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2016

New Publications - November 2016

Emsbo, Poul, Seal, R.R., Breit, G.N., Diehl, S.F., and Shah, A.K., 2016, Sedimentary exhalative (sedex) zinc-lead-silver deposit model: U.S. Geological Survey Scientific Investigations Report 2010–5070–N, 57 p., http://dx.doi.org/10.3133/sir20105070N.

Van Gosen, B.S., Johnson, M.R., and Goldman, M.A., 2016, Three GIS datasets defining areas permissive for the occurrence of uranium-bearing, solution-collapse breccia pipes in northern Arizona and southeast Utah: U.S. Geological Survey data release, https://dx.doi.org/10.5066/F76D5R3Z.

Yager, D.B., 2016, Potash—A vital agricultural nutrient sourced from geologic deposits: U.S. Geological Survey Open-File Report 2016-1167, 28 p., http://dx.doi.org/10.3133/ofr20161167.

Potash Cache: USGS Study Summarizes U.S. Sources of an Essential Nutrient for Agriculture

New USGS report summarizes the primary sources of potash in the United States. Potash is an essential nutrient that, along with phosphorus and nitrogen, is used as feretilizer for growing crops.

USGS at American Indian Science and Engineering Society 2016 Meeting

Maria Montour will be attending the American Indian Science and Engineering Society (AISES) 2016 National Conference in Minneapolis, MN, November 9-12. In addition to attending the AISES Government Relations Council meeting, USGS will have an exhibit booth at the career fair with information about USGS science programs and careers. The annual AISES conference is the premier event for American Indian and Alaska Native science, Technology, Engineering, and Math (STEM) students and professionals in the U.S.

New Publications - October 2016

Frank, D.G., Frost, T.P., Day, W.C., and the USGS SaMiRA team, 2016, U.S. Geological Survey mineral-resource assessment of Sagebrush Focal Areas in the Western United States: U.S. Geological Survey Fact Sheet 2016–3074, 4 p., http://dx.doi.org/10.3133/fs20163074.

Lund, K., Zürcher, L., Hofstra, A.H., Van Gosen, B.S., Benson, M.E., Box, S.E., Anderson, E.D., Bleiwas, D.I., DeAngelo, J., Drake, R.M., II, Fernette, G.L., Giles, S.A., Glen, J.M.G., Haacke, J.E., Horton, J., John, D.M., Robinson, G.R., Jr., Rockwell, B.W., San Juan, C.A., Shaffer, B.N., Smith, S.M., and Williams, C.F., 2016, Geology and mineral resources of the North-Central Idaho Sagebrush Focal Area: U.S. Geological Survey Scientific Investigations Report 2016–5089–C, 147 p., http://dx.doi.org/10.3133/sir20165089C.

Mauk, J.L., Zientek, M.L., Hearn, B.C., Jr., Parks, H.L., Jenkins, M.C., Anderson, E.D., Benson, M.E., Bleiwas, D.I., DeAngelo, J., Denning, P.D., Dicken, C.L., Drake, R.M., II, Fernette, G.L., Folger, H.W., Giles, S.A., Glen, J.M.G., Granitto, M., Haacke, J.E., Horton, J.D., Kelley, K.D., Ober, J.A., Rockwell, B.W., San Juan, C.A., Sangine, E.S., Schweitzer, P.N., Shaffer, B.N., Smith, S.M., Williams, C.F., and Yager, D.B., 2016, Geology and mineral resources of the North-Central Montana Sagebrush Focal Area: U.S. Geological Survey Scientific Investigations Report 2016–5089–D, 104 p., http://dx.doi.org/10.3133/sir20165089D.

Slack, J.F., Falck, H., Kelley, K.D., and Xue, G.G., 2016, Geochemistry of host rocks in the Howards Pass district, Yukon-Northwest Territories, Canada: implications for sedimentary environments of Zn-Pb and phosphate mineralization: Mineralium Deposita, First Online: 05 October 2016, doi:10.1007/s00126-016-0680-x.

Van Gosen, B.S., Bleiwas, D.I., Bedinger, G.M., Ellefsen, K.J., and Shah, A.K., 2016, Coastal deposits of heavy mineral sands--Global significance and US resources: Mining Engineering, 68(10), p. 36-43. View article preview.

Vikre, P.G., Benson, M.E., Bleiwas, D.I., Colgan, J.P., Cossette, P.M., DeAngelo, J., Dicken, C.L., Drake, R.M., II, du Bray, E.A., Fernette, G.L., Glen, J.M.G., Haacke, J.E., Hall, S.M., Hofstra, A.H., John, D.A., Ludington, S., Mihalasky, M.J., Rytuba, J.J., Shaffer, B.N., Stillings, L.L., Wallis, J.C., Williams, C.F., Yager, D.B., and Zürcher, L., 2016, Geology and mineral resources of the Sheldon-Hart Mountain National Wildlife Refuge Complex (Oregon and Nevada), the Southeastern Oregon and North-Central Nevada, and the Southern Idaho and Northern Nevada (and Utah) Sagebrush Focal Areas: U.S. Geological Survey Scientific Investigations Report 2016–5089–B, 220 p., http://dx.doi.org/10.3133/sir20165089B.

Wilson, A.B., Hayes, T.S., Benson, M.E., Yager, D.B., Anderson, E.D., Bleiwas, D.I., DeAngelo, J., Dicken, C.L., Drake, R.M., II, Fernette, G.L., Giles, S.A., Glen, J.M.G., Haacke, J.E., Horton, J.D., Parks, H.L., Rockwell, B.W., and Williams, C.F., 2016, Geology and mineral resources of the Southwestern and South-Central Wyoming Sagebrush Focal Area, Wyoming, and the Bear River Watershed Sagebrush Focal Area, Wyoming and Utah: U.S. Geological Survey Scientific Investigations Report 2016–5089–E, 128 p., http://dx.doi.org/10.3133/sir20165089E.

USGS Scientist on Volcano Research Cruise

Ian Ridley is participating on a National Science Foundation sponsored research cruise west of the East Pacific Rise through the month of November. The Off-Axis Seamount Investigations at Siqueiros (OASIS) cruise will examine a linear chain of volcanoes that haven't been explored before. The OASIS Science Team will use the D/S Alvin for up close and personal examination together with the autonomous underwater vehicle (AUV) Sentry, a night-time dredging program, and high resolution seafloor mapping to the guide the program. NSF cruise outreach requirements require that video is streamed to junior high schools. Video will be streamed every Monday and Thursday, with several pre-cruise videos already available on the OASIS Science Team YouTube Channel and Facebook page.

USGS Participates at the 2016 Alaska Miners Association Convention

USGS mineral-related research results will be presented at the Alaska Miners Association annual convention in Anchorage, Alaska, November 7-12. Research will be presented via poster presentations, an invited talk by Associate Director for Minerals and Energy Murray Hitzman, and talks on the 2016 Geochemical Atlas of Alaska (Jeff Mauk) and The application of indicator mineral methods to exploration: Examples from Southwest Alaska and British Columbia (Karen Kelley). A GIS applications short course, Analysis of Publicly Available GIS Data for Mineral Exploration, will utilize the data-driven analytical process developed by USGS for mineral resource assessment presented in 2015. The course will benefit from the expertise of USGS scientists along with GIS experts and geologists from the BLM and Alaska Division of Geological & Geophysical Surveys.

Surficial Mineralogy Map Featured in Article

The Land Process Distributed Active Archive Center (LP DAAC) posted an article about the USGS National Map of Surficial Mineralogy. The September 20 article, “USGS National Map of Surficial Mineralogy: Identifying Minerals Using ASTER,” discusses the map, which identifies exposed minerals on the Conterminous U.S., the map’s generation using ASTER data, its recent use for mineral resource assessments, and potential applications for other geologic- and minerals-related research.

USGS to Present Research at Water-Rock Interaction Conference

USGS scientists Rich Wanty, JoAnn Holloway, and Philip Verplanck are presenting their minerals-related research at the Water-Rock Interaction 15 conference, October 16-21, in Évora, Portugal. The presentations are: “The role of water in the formation of rare earth element deposits” (Verplanck), “Using large databases of groundwater chemistry in the northern Midwest USA: The effects of geologic and anthropogenic factors” (Wanty), and “Mobilization of mercury and arsenic from a carbonate-hosted ore deposit” (Holloway).

USGS at 2016 Annual Carolina Geological Society Meeting

Chris Holm-Denoma, Arthur Merschat, and Scott Southworth will lead the 2016 Annual Carolina Geological Society Meeting and Field Trip-Geology of the Mount Rogers area, revisited: Evidence of Neoproterozoic continental rifting, glaciation, and the opening and closing of the Iapetus ocean, Blue Ridge, VA–NC, October 28-30, 2016. Two papers will be published in the field trip guidebook that will be available on-line after the meeting: 1) Merschat, A.J., Southworth, C.S., Holm-Denoma, C.S., and McAleer, R.J., 2016, Geology of the Mount Rogers area, revisited: Evidence of Neoproterozoic continental rifting, glaciation, and the opening and closing of the Iapetus ocean, Blue Ridge, VA–NC–TN, , 2) McClellan, E.A., Holm-Denoma, C.S., Balderas, R., Brett, M., Stokes, D., Trout, P., and Yonts, J., 2016, Provenance analysis of conglomerates in the Neoproterozoic Mount Rogers Formation, SW Virginia.

USGS Participation at European Union Critical Element Workshop

Philip L. Verplanck was invited to be on the council for the European Union funded research project investigating critical elements in alkaline rocks. From October 1-9, Verplanck participated in a workshop with 30 research scientists and industry participants in the Republic of Malawi and presented a talk, “Reconnaissance survey of surface water samples at the Bear Lodge and Bokan Mountain rare earth element (REE) exploration targets”. Verplanck also spent 5 days visiting critical element exploration targets.

USGS Scientist Selected for Distinguished Lecturer Committee

Celestine Mercer has accepted a nomination to serve on the Society of Economic Geologists (SEG) Distinguished Lecturer Committee. The committee, whose members serve three-year terms, seeks and recommends candidates to give the SEG Distinguished Lecture for the following year.

USGS Assesses Mineral Potential for Sagebrush Habitats in Six Western States

At the request of Bureau of Land Management, USGS has completed a comprehensive assessment and inventory of potential mineral resources covering approximately 10 million acres of Federal and adjacent lands in Idaho, Montana, Nevada, Oregon, Utah and Wyoming.

USGS Visits World Class Iron Province in Sweden

During September 12-22, USGS scientists traveled north of the Arctic Circle to meet with experts on world class iron-oxide apatite and iron-oxide copper gold in Northern Sweden. The visit, which included a geologic field trip and an underground mine tour, was hosted by the Swedish Geological Survey and Luossavaara-Kiirunavaara AB (LKAB), and provided a forum to exchange information on the geology, geophysics, mineralization of Sweden’s iron province and a similar mineral province in southeast Missouri. USGS scientists John Slack, Ed du Bray, Al Hofstra, Anne McCafferty, and Craig Johnson presented talks on their Missouri minerals resources research to both the Swedish Geological Survey and LKAB headquarters.

New Publications and Data Releases - September 2016

Hammarstrom, J.M., Mihalasky, M.J., Ludington, Steve, Phillips, J.D., Berger, B.R., Denning, P.D., Dicken, C.L., Mars, J.C., Zientek, M.L., Herrington, R.J., and Seltmann, Reimar, In press-Accepted Manuscript, Undiscovered porphyry copper resources in the Urals—A probabilistic mineral resource assessment: Ore Geology Reviews, available online 6 September 2016, 78 p., doi: 10.1016/j.oregeorev.2016.09.007.

Hagadorn, J.W., Whitely, K.R., Lahey, B.L., Henderson, C.M., and Holm-Denoma, C.S., 2016, The Permian–Triassic transition in Colorado: GSA Field Guides, 44, p. 73-92, doi: 10.1130/2016.0044(03).

Van Gosen, B.S., 2016, Element concentrations in surface soils of the Coconino Plateau, Grand Canyon region, Coconino County, Arizona: U.S. Geological Survey Open-File Report 2016–1160, 9 p., http://dx.doi.org/10.3133/ofr20161160.

Yager, D.B., Fey, D.L., Chapin, T.P., and Johnson, R.H., 2016, New perspectives on a 140-year legacy of mining and abandoned mine cleanup in the San Juan Mountains, Colorado: GSA Field Guides, 44, p. 377-419, doi:10.1130/2016.0044(16).

USGS Hosts Geochronology Workshop

USGS is hosting a geochronology workshop at the Denver Federal Center called “New Directions for the EARTHTIME Community” on September 28-29. Nearly 60 geochronologists from around the world will meet following the Geological Society of America conference in Denver to discuss challenges and opportunities in geochronology. USGS participants are Leah Morgan, Mike Cosca, Leonid Neymark, Andy Calvert, Bob Fleck, and Seth Burgess.

USGS Participation at Society of Economic Geologists 2016 Conference

Several USGS scientists will be discussing their mineral resources related research at the 2016 Society of Economic Geologists Annual Conference in Çeşme, Turkey, September 25-28.

USGS Mineral Resources Science at Geological Society of America Annual Meeting 2016

USGS scientists will present their latest research at the Geological Society of American annual meeting in Denver, CO, September 25-28. Topics include rare earth and critical elements in ore deposits, economic geology, mineral resources and the environment, microanalytical and geochemical techniques and applications in ore deposit research.

New Publications and Data Releases - August 2016

Carr, S.A., Mills, C.T., and Mandernack, K.W., 2016, The use of amino acid indices for assessing organic matter quality and microbial abundance in deep-sea Antarctic sediments of IODP Expedition 318: Marine Chemistry 186, p. 72-82, http://dx.doi.org/10.1016/j.marchem.2016.08.002.

Day, W.C., Frost, T.P., Hammarstrom, J.M., and Zientek, M.L., eds., 2016, Mineral Resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming: U.S. Geological Survey Scientific Investigations Report 2016–5089, http://dx.doi.org/10.3133/sir20165089.

Day, W.C., Hammarstrom, J.M., Zientek, M.L., and Frost, T.P., eds., 2016, Overview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming: U.S. Geological Survey Scientific Investigations Report 2016–5089–A, 211 p., http://dx.doi.org/10.3133/sir20165089A.

Dicken, C.L., and San Juan, C.A., 2016, Bureau of Land Management's Land and Mineral Legacy Rehost System (LR2000) mineral use cases for the Sagebrush Mineral-Resource Assessment, Idaho, Montana, Nevada, Oregon, Utah, and Wyoming: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7RX996K.

du Bray, E.A., 2017, Geochemical characteristics of igneous rocks associated with epithermal mineral deposits—A review: Ore Geology Reviews, 80, p. 767-783, doi:10.1016/j.oregeorev.2016.08.023.

Fernette, G.L., Bellora, J.D., Bartels, M. P., Gallegos, S.M., Jordan, J.K., Tureck, K.R., and Chapman, A.L., 2016, USMIN Mineral Resource Data for the U.S. Geological Survey Sagebrush Mineral-Resource Assessment Project: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7J964GW.

Fernette, G.L., Horton, J.D., King, Zachary, San Juan, C.A., and Schweitzer, P.N., 2016, Prospect- and Mine-Related Features from U.S. Geological Survey 7.5- and 15-Minute Topographic Quadrangle Maps of the Western United States: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7JD4TWT.

Hou, B., Keeling, J., and Van Gosen, B.S., 2016, Geological and Exploration Models of Beach Placer Deposits, Integrated from Case-Studies of Southern Australia: Ore Geology Reviews, 80, p. 437-459, doi:10.1016/j.oregeorev.2016.07.016.

Ranalli, A.T., and Yager, D.B., In Press; Accepted Manuscript, Use of mineral/solution equilibrium calculations to assess the potential for carnotite precipitation from groundwater in the Texas Panhandle, USA: Applied Geochemistry, Available online 11 August 2016, doi:10.1016/j.apgeochem.2016.08.004.

San Juan, C.A., Horton, J.D., Parks, H.L., Mihalasky, M.J., Anderson, E.D., Benson, Mary Ellen, Box, S.E., Cossette, P.M., Denning, P.D., Giles, S.A., Hall, S.M., Hayes, T.S., Hearn, Jr., C.B., Hofstra, A.H., John, D.A., Ludington, S.D., Lund, Karen, Mauk, J.L., Robinson, G.R., Rockwell, B.W., Rytuba, J.J., Smith, S.M., Stillings, L.L., Van Gosen, B.S., Vikre, P.G., Wallis, John, Wilson, A.B., Zientek, M.L., and Zürcher, Lukas, 2016, Locatable Mineral Assessment Tracts for the U.S. Geological Survey Sagebrush Mineral-Resource Assessment Project: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7833Q4R.

USGS at International Geological Congress

August 29-September 4, USGS scientists Raymond Kokaly, Garth Graham, Poul Emsbo, and Ryan Taylor will present their mineral resources-related research at the International Geological Congress in Cape Town, South Africa. Presentation topics are on the applications of imaging spectrometer data in Alaskan mineral resource studies (Kokaly), intrusions and associated Alaskan porphyry copper deposits (Graham), and availability of rare earth elements in sedimentary phosphate deposits (Emsbo). Ryan Taylor will give a keynote presentation, “Determining hydrothermal fluid source for gold deposits through geochemistry of monazite and xenotime crystals”, and Mineral Resources Program Coordinator Lawrence Meinert will present a talk, “Mineral Resources - Supply, Demand, and the Future”. USGS is also sponsoring an exhibit booth to provide information on USGS science and how to find USGS products and data.

New Publications - July 2016

Day, W.C., Granitto, Matthew, Slack, J.F., and Ayuso, R.A., 2016, Geochemical Database for Iron Oxide-Copper-Cobalt-Gold-Rare Earth Element Deposits of Southeast Missouri: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7P26W67.

Ellefsen, K.J., and Smith, D.B., 2016, Manual hierarchical clustering of regional geochemical data using a Bayesian finite mixture model: Applied Geochemistry, In Press, Corrected Proof, doi:10.1016/j.apgeochem.2016.05.016.

Kokaly, R.F., Graham, G.E., Hoefen, T.M., Kelley, K.D., Johnson, M.R., and Hubbard, B.E., Hyperspectral surveying for mineral resources in Alaska: U.S. Geological Survey Fact Sheet 2016-3029, 2 p., http://dx.doi.org/10.3133/fs20163029.

Colorado School of Mines and USGS To Sign Addendum to Research Collaboration MOU

On August 3rd, USGS and the Colorado School of Mines will sign an Addendum to the Memorandum of Understanding between them (MOU GS11000618 signed in 2011). The MOU’s end result is a research center between Colorado School of Mines and USGS.

New Publications - June 2016

Lee, G.K., Yager, D.B., Mauk, J.L, Granitto, Matthew, Denning, P.D., Wang, Bronwen, and Werdon, M.B., 2016, The Geochemical Atlas of Alaska, 2016: U.S. Geological Survey Data Series 908, 25 p., 272 sheets (11"×17"), GIS database, http://dx.doi.org/10.3133/ds908.

Witt, E.C., Pribil, M.J., Hogan, J.P., and Wronkiewicz, D.J., 2016, Isotopically constrained lead sources in fugitive dust from unsurfaced roads in the southeast Missouri mining district: Environmental Pollution, in press, Corrected Proof, doi: 10.1016/j.envpol.2016.05.070.

USGS Presentations at European Workshop on Laser Ablation

USGS scientists Ian Ridley and Michael Cosca will be presenting their research at the European Workshop on Laser Ablation, Ljubljana, Slovenia, July 12-15. Ian Ridley is presenting a paper, "Measurement and utility of sulfur stable isotopes in economic geology by laser ablation MC-ICP-MS", and Michael Cosca is giving a talk titled "Advances, challenges and the need for matrix matched isotopic reference material for high precision S, Sr and Pb in situ laser ablation MC-ICP-MS analysis".

Presentation at Gordon Research Conference on the Geochemistry of Mineral Deposits

Celeste Mercer attended the 2016 Gordon Research Conference on the Geochemistry of Mineral Deposits in Les Diablerets, Switzerland, to give an invited talk entitled, "Time Scales of Porphyry Cu Deposit Formation: Insights from Chemical and Physical Modeling". Celeste also coauthored a poster, "Geochemical and Geochronologic Investigations of Zircon-hosted Melt Inclusions in Rhyolites from the Mesoproterozoic Pea Ridge IOA-REE Deposit, St. Francois Mountains, Missouri" (Kathryn Watts & Celestine Mercer), presenting new results from our current Magmas to Metals project.

New USGS Alaska Geochemical Atlas Tells Rich Tales About the Last Frontier

The U.S. Geological Survey has produced a new compilation of landscape-scale sediment and soil geochemical data for Alaska using modern modeling and analysis techniques.

USGS scientists co-author Alaska chapter of newly-released book, Mineral Resources in the Arctic

USGS scientists Richard J. Goldfarb, Corey Meighan, Larry Meinert, and Frederic H. Wilson, are co-authors of the chapter, “Alaska - Mineral Deposits and Metallogeny,” in a new, comprehensive book, Mineral Resources in the Arctic, a Special Publication by the Geological Survey of Norway. This is the first compilation of the most important mineral deposits north of 60 degrees N., written by authors from the Geological Surveys of Canada, Finland, Greenland, Iceland, Norway, Russia, Sweden, and USA. Many world-class deposits are in the Circum-Arctic of Alaska; the chapter describes the region’s tectonic history, major ore deposit classes, and details of individual deposits. The book was released June 15, 2016, along with a briefer version for general-interest readers, to be published in English, French, and Russian.

Presentation at Central Anatolian Tectonics Workshop

Mike Cosca is attending a scientific workshop in Avanos, Turkey, June 7-9, to present recent research results from several areas within central Turkey and finalize scientific articles in collaboration with scientists from the U.S., Canada, Germany, and Turkey. The National Science Foundation supports the workshop as part of a 5-year Continental Dynamics project to study Central Anatolian Tectonics. The broader goals of the project are to understand how deep mantle processes affect tectonic processes occurring at the surface (rock uplift, basin subsidence, volcanism, seismicity, and faulting).

Invited Presentation at Rare Earth Society Conference

Philip L. Verplanck presented an invited talk at the Rare Earth Society of Japan’s international conference in Sapporo, Japan, June 5-10. The talk, “Rare Earth Element Resources of the United States,” is by Verplanck, P.L. and Van Gosen, B.S. From June 10-23, Philip collaborated with Chinese researchers at the University of Science and Technology, Beijing, on critical element deposits in Inner Mongolia. He presented a lecture entitled “Hardrock mining the United States: past, present, and future”.

New Publication - May 2016

Ault, Timothy, Van Gosen, Bradley, Krahn, Steven, and Croff, Allen, 2016, Natural thorium resources and recovery—Options and impacts: Nuclear Technology, v. 194, no. 2, p. 136–151, http://dx.doi.org/10.13182/NT15-83.

USGS Scientist Selected as Award Recipient

Celestine Mercer was selected as the 2015 recipient of the Society of Economic Geologists Brian J. Skinner award for her paper, “Time Scales of Porphyry Cu Deposit Formation: Insights from Titanium Diffusion in Quartz”. The award will be presented during the Society of Economic Geologists 2016 Annual Meeting, September 25-28, in Çeşme, Turkey. The Brian J. Skinner Award is presented annually to the author(s) of an outstanding paper published in Economic Geology.

USGS Presentations on Eastern Alaska-Yukon Research

On June 1-3, USGS scientists are presented their research on the east-central Alaska-Yukon region​ at the ​​Geological Association of Canada–Mineralogical Association of Canada Annual Meeting in Whitehorse, Yukon​. ​​​Presentations focused on recent research for the Mineral Resources Program's Tectonic and Metallogenic Evolution of the Eastern Yukon-Tanana Upland, Alaska​ project.

Meetings on Tellurium Research

April 26-29, USGS scientists Karen Kelley, Erin Marsh, Mitchell Bennett, and Eric Anderson met with scientists from University of Leichester and the New Mexico Bureau of Geology and Mineral Resources to plan work related to USGS research into tellurium enrichment in alkali epithermal gold systems. The meetings resulted in planned field work in Colorado (April 26-29) and in New Mexico (May 9-14).

USGS Research at Pan-American Current Research on Fluid Inclusions Conference

Fluid Inclusions Conference (PACROFI XIII), May 24-26, in Columbia, MO. Presentations focus on the information fluid inclusion research provides about the genesis of ore deposits and related processes.

  • Chemical and isotopic comparison of Illinois Basin brines and fluid inclusions in the Illinois-Kentucky Fluorspar District: Implications for the origin, paleohydrology, and preservation of Permian ore fluids (A. Hofstra, P. Emsbo, L. Logan)
  • Cathodoluminescence and fluid inclusion investigations in quartz: Preliminary results from the Yellow Pine Au-Sb deposit, Idaho (M. Bennett)

New Publications - April 2016

Ellefsen, K.J, and Smith, D.B., 2016, User's guide for GcClust—An R package for clustering of regional geochemical data: U.S. Geological Survey Techniques and Methods 7–C13, 21 p., http://dx.doi.org/10.3133/tm7c13.

Sholeh, A., Rastad, E., Huston, D., Gemmell, J.B., and Taylor, R.D., 2016, The Chahnaly low sulfidation epithermal gold deposit, western Makran volcanic arc, southeastern Iran: Economic Geology, 111(3), p. 619-639, doi: 10.2113/econgeo.111.3.619.

Participation at 62nd Annual Institute on Lake Superior Geology Meeting

Andrew Manning presesnted about his research on the Duluth Complex at the 62nd Annual Institute on Lake Superior Geology Meeting, May 4-8, in Madison, WI. The presentation was titled, "Preliminary groundwater age and chemistry data from cover overlying Duluth Complex Ni-Cu-PGE deposits, NE Minnesota."

USGS Participation at Electron Probe Microanalysis Conference (EPMA 2016)

Heather Lowers presented a talk, “Comparison of WDS and EDS Analysis of REE Minerals,” at the 2016 Electron Probe Microanalysis Conference (EPMA 2016), May 16-19, in Madison, WI. Heather was also on the conference organizing committee, edited the conference program, and served as committee chair for the Early Career Scholar program, which aimed to bring undergraduates, graduates, post docs, and early career professionals to the meeting through a grant from NSF.

USGS Scientists Serves as Delegate to United Nations Group

On April 25-29 Brad Van Gosen served as the U.S. delegate to the 7th Session of the Expert Group on Resource Classification, an annual conference in Palais des Nations, Geneva, Switzerland that is comprised of members from more than 50 countries. The group, brought together by the United Nations Economic Commission for Europe (UNECE), has developed, and continues to refine, the United Nations Framework Classification for Fossil Energy and Mineral Reserves and Resources.

New Publications - March 2016

du Bray, E.A., John, D.A., Cousens, B.L., Hayden, L.A., and Vikre, P.G., 2016, Geochemistry, petrologic evolution, and ore deposits of the Miocene Bodie Hills Volcanic Field, California and Nevada: American Mineralogist, v. 101, p. 644-677, doi: 10.2138/am-2016-5440.

Eckley, C.S., Tate, M.T., Lin, C., Gustin, M., Dent, S., Eagles-Smith, C., Lutz, M.A., Wickland, K.P., Wang, B., Gray, J.E., Edwards, G.C., Krabbenhoft, D.P., and Smith, D.B., In Press, Surface-air mercury fluxes across Western North America: A synthesis of spatial trends and controlling variables: Science of the Total Environment, Available online 28 February 2016, Corrected Proof, doi: 10.1016/j.scitotenv.2016.02.121.

Qiu, K., Deng, J., Taylor, R.D., Song, K., Song, Y., Li, Q., and Goldfarb, R.J., 2016, Paleozoic magmatism and porphyry Cu-mineralization in an evolving tectonic setting in the North Qilian Orogenic Belt, NW China: Journal of Asian Earth Sciences, 122, p. 20-40, doi: 10.1016/j.jseaes.2016.02.007.

Strong, T.R., and Driscoll, R.L., 2016, A process for reducing rocks and concentrating heavy minerals: U.S. Geological Survey Open-File Report 2016–1022, 16 p., http://dx.doi.org/10.3133/ofr20161022.

Van Gosen, B.S., and Tulsidas, H., 2016, 10 – Thorium as a nuclear fuel, in Hore-Lacy, I., ed., Uranium for Nuclear Power: Resources, Mining and Transformation to Fuel, Woodhead Publishing Series in Energy: Number 93, Elsevier, p. 253-296, doi:10.1016/B978-0-08-100307-7.00010-7.

Participation at Geological Society of America 2016 Southeastern Section Meeting

USGS mineral resources science was presented at Geological Society of America Southeastern Section Meeting, March 31-April 1, Colombia, SC.

Technical Announcement: Special Reviews Book Published

Special Review and Webinar Showcase Critical Minerals Research at USGS was released March 30 regarding the publication of Reviews in Economic Geology Volume 18, Rare Earth and Critical Elements in Ore Deposits, featuring several papers authored and co-authored by USGS.

Collaboration with New York State Geological Survey

On March 23-25, USGS scientists met with scientists from the New York State Geological Survey for a field visit to the Eastern Adirondacks of upstate New York. The field work included sampling and survey efforts geared toward understanding and evaluating rare earth element-bearing mineral deposits throughout the area. The visit followed attendance at the Geological Society of America Northeastern Section meeting, which included several sessions on the region.

Presentation at MIT

Leah Morgan presented a talk, “Variability in stable potassium isotopes in geological and biological systems”, Friday, April 1 for the Earth, Atmospheric and Planetary Sciences Department at Massachusetts Institute of Technology, Cambridge, MA.

Participation at Geological Society of America 2016 Northeastern Section Meeting

USGS research about U-Pb zircon geochronology research on northeastern U.S. located studies was presented at the Geological Society of America 2016 Northeastern Section Meeting.

Scientist Receives Journal Reviewer Award

The Geological Society of America named Karen Lund a “2015 Exceptional Reviewer" for their journal Geosphere.

Article Features USGS Asbestos Research

On February 17, the news service FAIRWARNING published an on-line article "Report Renews Concern About Asbestos-Like Minerals at Sites in Arid West", which highlights a USGS study and journal paper, "Geologic occurrences of erionite in the United States: An emerging national public health concern for respiratory disease," that identified 95 natural occurrences of erionite in the western U.S.. USGS scientists Brad Van Gosen, Thomas Blitz, Geoff Plumlee, Greg Meeker and USFS scientist M. Patrick Pierson authored the study and paper cited in the web article. A map of known erionite occurrences in the U.S., reproduced from the journal article, was also used in the web article.

EPA and USGS Study Results in Remediation Agreement for Chicago, IL Neighborhood

A source attribution study conducted by the Environmental Protection Agency (Region V and National Enforcement Investigations Center) and USGS in the Pilsen neighborhood of Chicago, IL, resulted in an agreement and ongoing remediation for lead contamination. USGS performed geochemical analyses of EPA samples to help determine responsible parties for the neighborhood’s elevated lead concentrations. The EPA and USGS collaboration produced a comprehensive analytical report demonstrating a nearby foundry is partly responsible for elevated lead, resulting in remediation of the affected areas. In addition to EPA news releases, the Chicago Tribune has published articles and it remains a high profile issue in the community.

USGS Enters Technical Assistance Agreement with Rio Tinto to Reanalyze NURE Samples

USGS enters into a $1.3 million Technical Assistance Agreement with the Rio Tinto Group to reanalyze 60,000 samples collected in the 1970s by the National Uranium Resource Evaluation (NURE) program. The stream sediment samples, collected from the southwestern U.S., are being reanalyzed to increase the reliability of the data and to add concentration data of 48 elements for mineral exploration. The new data from the USGS sample repository will be publically available and can be used by other agencies for historical baseline information and to help with current environmental and economic issues.

New Publications - January 2016

Bern, C.R., Shah, A.K., Benzel, W.M., and Lowers, H.A., 2016, The distribution and composition of REE-bearing minerals in placers of the Atlantic and Gulf coastal plains, USA: Journal of Geochemical Exploration, 162 (March 2016), p. 50-61. doi: 10.1016/j.gexplo.2015.12.011

Doyle, J.M., Gleeson, Tom, Manning, A.H., and Mayer, K.U., 2015, Using noble gas tracers to constrain a groundwater flow model with recharge elevations: A novel approach for mountainous terrain: Water Resources Research, 51 (10), p. 8094-8113. doi: 10.1002/2015WR017274

Fisher, S.C., Reilly, T.J., Jones, D.K., Benzel, W.M., Griffin, D.W., Loftin, K.A., Iwanowicz, L.R., and Cohl, J.A., 2015, Standard operating procedure for collection of soil and sediment samples for the Sediment-bound Contaminant Resiliency and Response (SCoRR) strategy pilot study: U.S. Geological Survey Open-File Report 2015–1188b, 37 p., http://dx.doi.org/10.3133/ofr20151188B.

Manning, A.H., Mills, C.T., Morrison, J.M., and Ball, L.B., 2015, Insights into controls on hexavalent chromium in groundwater provided by environmental tracers, Sacramento Valley, California, USA: Applied Geochemistry, 62, November 2015, p. 186-199. doi: 10.1016/j.apgeochem.2015.05.010

Poole, F.G., and Sandberg, C.A., editors, 2015, Unusual Central Nevada Geologic Terranes Produced by Late Devonian Antler Orogeny and Alamo Impact: GSA Special Papers 517, 104 p. ISBN: 978-0-8137-2517-8. doi: 10.1130/9780813725178

Taylor, C.D., ed., 2015, Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II) phase V: U.S. Geological Survey Open-File Report 2013‒1280, 20 chaps., pages variable, pls. variable, http://dx.doi.org/10.3133/ofr20131280. [In English and French.]

USGS Work with Brazailian National Water Agency

Brad Van Gosen and Katie Walton-Day are meeting with the Brazilian National Water Agency (Agência Nactional de Águas - ANA) in Brazil, January 11-15. They will be consulting and advising the ANA on the development of a sampling plan for the Bento Rodrigues dam failure that occurred on November 5, 2015. In addition to meetings, a planned field trip will fly from the dam failure site to the Atlantic Ocean.

USGS Contributes to United Nations Report

Brad Van Gosen and Susan Hall authored separate chapters (case studies) in the recently released United Nations report, Application of UNFC 2009 to Nuclear Fuel Resources - Case Studies, published by the United Nations Economic Commission for Europe as ECE Energy Series No. 46. This publication includes eight case studies that demonstrate the classification of uranium or thorium resources at different scales, with examples in different countries, to test the application of the United Nations Framework Classification for Fossil Energy and Mineral Reserves and Resources 2009 (UNFC-2009) to Nuclear Fuel Resources. Brad and Susan authored deposit-specific examples in the U.S. designed to demonstrate the classification of uranium and thorium resources, respectively, using the principles of UNFC-2009. Brad also served as the principal editor of this report.

USGS Research in Asbestos Article

Brad Van Gosen was interviewed and provided graphics for the news article "Asbestos Dangers are Still Lurking", published in the Health section of the U.S. News & World Report on-line edition of January 5.

USGS Interviewed About Uranium in Arizona

Brad Van Gosen and Katie Walton-Day were interviewed and acknowledged in a news article, "Elevated uranium levels near mines a concern", posted January 1 in the online edition of the Arizona Daily Sun, a newspaper serving Flagstaff and northern Arizona. The article describes concerns about elevated levels of uranium measured in soil adjacent to a northern Arizona uranium mine, a circumstance that has spurred state regulators to reevaluate dust and air pollution controls for three Grand Canyon-area mines. USGS scientists are conducting a multidisciplinary USGS project designed to address scientific data gaps related to the potential environmental effects of uranium exploration and mining activities in the Grand Canyon region.

Top

2015

New Publications - December 2015

Gallegos, T.J., Campbell, K.M., Zielinski, R.A., Reimus, P.W., Clay, J.T., Janot, N., Bargar, J.R., and Benzel, W.M., 2015, Persistent U(IV) and U(VI) following in-situ recovery (ISR) mining of a sandstone uranium deposit, Wyoming, USA: Applied Geochemistry, 63, December 2015, p. 222-234. doi: 10.1016/j.apgeochem.2015.08.017

Guo, Huaming, Jia, Yongfeng, Wanty, R.B., Jiang, Yuxiao, Zhao, Weiguang, Xiu, Wei, Shen, Jiaxing, Li, Yuan, Cao, Yongsheng, Wu, Yang, Zhang, Di, Wei, Chao, Zhang, Yilong, Cao, Wengeng, and Foster, A.L., 2015, Contrasting distributions of groundwater arsenic and uranium in the western Hetao basin, Inner Mongolia: Implication for origins and fate controls: Science of The Total Environment, 541, 15 January 2016, p. 1172-1190. doi: 10.1016/j.scitotenv.2015.10.018

Participation at American Exploration and Mining Association 2015 Meeting

The American Exploration and Mining Association funded five USGS student contractors to attend their annual meeting, November 30-December 4, in Spokane, Washington. The students presented a poster on the USGS Mineral Deposit Database Project (USMIN). Janice M. Schneider, Assistant Secretary of Interior, Land and Minerals Management visited the USMIN Project Poster and met the students, USMIN Project Chief Greg Fernette, Minerals Program Deputy Coordinator Jeff Doebrich, and Spokane Science Center Deputy Directory Tom Frost. The USGS Mineral Resources Program had an exhibit booth at this meeting.

Presentation for Wyoming Organizations

Anna Wilson will be presenting at The Wyoming Chapter of The Wildlife Society and the Wyoming Landscape Conservation Initiative 2015 Joint Conference, in Lander, WY, December 1-3, 2015. Her presentation is titled, “Inorganic mineral resources in the Wyoming Landscape Conservation Initiative (WLCI) Study Area.”

Invited Presentation for British Columbia Geological Survey

On November 13, USGS scientist Philip Verplanck gave a talk at the British Columbia Geological Survey’s Symposium on critical and strategic materials in Victoria, British Columbia entitled “Nd and Sr isotopic compositions of rare earth element mineralized carbonatites.”

New Publication - November 2015

Dekov, V.M., Lalonde, S.V., Kamenov, G.D., Bayon, G., Shanks III, W.C., Fortin, D., Fouquet, Y., and Moscati, R.J., 2015, Geochemistry and mineralogy of a silica chimney from an inactive seafloor hydrothermal field (East Pacific Rise, 18S): Chemical Geology, 415:126-140. doi: 10.1016/j.chemgeo.2015.09.017

Participation at American Geophysical Union Fall Meeting 2015

Our scientists are presenting their research at the AGU Fall Meeting in San Francisco, CA, December 14-18.

  • Michael Cosca, 40Ar/39Ar Geochronology and Chemical and Isotopic Compositions of Basaltic Rocks Near the Iskenderun Gulf, Turkey
  • Leah Morgan, Metrologically-Calibrated 40Ar Concentrations and Ages of Mineral Standards Used in 40Ar/39Ar Geochronology

Presentations in China

Leah Morgan is traveling to China November 7-14, 2015. She is visiting laboratories at Nanjing University, Nanjing, and China University of Geosciences, Wuhan. Morgan is presenting talks titled “Variability in stable potassium isotopes in geological and biological systems,’ and ‘Precision and accuracy in 40Ar/39Ar geochronology and its application to the Pleistocene geomagnetic timescale.'

USGS at AISES Conference, Phoenix, AZ

Robert Horton and Maria Montour will be attending the American Indian Science and Engineering Society (AISES) 2015 National Conference in Phoenix, AZ, November 19-21. In addition to attending the AISES Government Relations Council, USGS will be hosting an exhibit booth at the career fair with information about USGS science programs and careers. The annual AISES conference is the premier event for American Indian and Alaska Native science, Technology, Engineering, and Math (STEM) students and professionals in the U.S.

New Publications - October 2015

Fishman, N.S., Egenhoff, S.O., Boehlke, A.R., and Lowers, H.A., 2015, Petrology and diagenetic history of the upper shale member of the Late Devonian–Early Mississippian Bakken Formation, Williston Basin, North Dakota: GSA Special Papers, 515, p. 125-151. doi: 10.1130/2015.2515(07)

Reilly, T.J., Jones, D.K., Focazio, M.J., Aquino, K.C., Carbo, C.L., Kaufhold, E.E., Zinecker, E.K., Benzel, W.M., Fisher, S.C., Griffin, D.W., Iwanowicz, L.R., Loftin, K.A. and Schill, W.B., 2015, Strategy to evaluate persistent contaminant hazards resulting from sea-level rise and storm-derived disturbances—Study design and methodology for station prioritization: U.S. Geological Survey Open-File Report 2015–1188A, 20 p., http://dx.doi.org/10.3133/ofr20151188A.

Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Zane Hills, Hughes and Shungnak quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Raw Data File 2015-9, 5 p. doi: 10.14509/29453

Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Tonsina area, Valdez Quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Raw Data File 2015-8, 5 p. doi: 10.14509/29452

Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the northeastern Alaska Range, Healy, Mount Hayes, Nabesna, and Tanacross quadrangles, Alaska: Alaska Division of Geological & Geophysical Surveys Raw Data File 2015-7, 6 p. doi: 10.14509/29451

Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Kougarok area, Bendeleben and Teller quadrangles, Seward Peninsula, Alaska: Alaska Division of Geological and Geophysical Surveys Raw Data File 2015-6, 5 p. doi: 10.14509/29450

Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Haines area, Juneau and Skagway quadrangles, southeast Alaska: Alaska Division of Geological and Geophysical Surveys Raw Data File 2015-5, 5 p. doi: 10.14509/29449

Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Raw Data File 2015-4, 5 p. doi: 10.14509/29448

Wilson, A.B., 2015, Uranium in the Wyoming Landscape Conservation Initiative Study Area, southwestern Wyoming: U.S. Geological Survey Open-File Report 2014–1123, 33 p., 1 plate, http://dx.doi.org/10.3133/ofr20141123.

Participation at Geological Society of America 2015 Annual Meeting

On November 1-4, multiple scientists are presenting their research on mineral resources, geochemistry, geophysics, and analytical methods development at the Geological Society of America 2015 Annual Meeting in Baltimore, MD.

Presentation to California Interagency Abandoned Mine Lands Group

On October 28, Greg Fernette will be presenting via WebEx to the California Interagency Abandoned Mine Lands Group on the USMIN project. The USMIN project objective is to develop a geospatial database of the mines and mineral deposits of the U.S. The USGS Minerals Program and the BLM Solid Minerals Program have an interagency agreement covering the project, under which BLM has provided $1.5 million in project funding.

Invited Presentation on Geochronology

On October 9, Christopher Holm-Denoma was an invited speaker for the University of Northern Colorado Earth Sciences Seminar. The presentation, "The ABC’s of U-Pb Geochronology- Apatite to Zircon from Alaska to the Appalachians," discussed the applications of laser-ablation inductively coupled plasma mass spectrometry at the U.S. Geological Survey, Denver.

New Publications - September 2015

Plumlee, G.S., Alpers, C.N., Morman, S.A., and San Juan, C., 2015, Anticipating environmental and environmental-health implications of extreme storms: ARkStorm Scenario: Natural Hazards Review, 11 p. plus supplementary maps and 22 p. supplementary text. http://dx.doi.org/10.1061/(ASCE)NH.1527-6996.0000188

Vikre, P.G., John, D.A., du Bray, E.A., and Fleck, R.J., 2015, Gold-silver mining districts, alteration zones, and paleolandforms in the Miocene Bodie Hills volcanic field, California and Nevada: U.S. Geological Survey Scientific Investigations Report 2015–5012, 160 p., http://dx.doi.org/10.3133/sir20155012.

Participation at EPA Lead in Urban Soils Workshop

Michael Pribil will be virtually participating in an EPA Region III Lead in Urban Soils Workshop, September 15-16, 2015, Philadelphia, PA. Mike will present his results of previously published / reported Pb and Mn source attribution studies in collaboration with EPA NEIC and EPA Regions II and V, where Pb isotopes constrained the sources of Pb and Mn. More than 100 state and federal EPA on scene coordinators and other principle investigators will be in attendance.

Participation at 30th Florida SME and Dreyer Conference

To advance current phosphate and future nonmetallic industrial minerals projects, Mary Ellen Benson and Anna Wilson will attend the 30th Florida Society for Mining, Metallurgy and Exploration Inc. (SME) and Dreyer Conference in Lakeland, Florida, from October 6-8, 2015, that focuses on Florida's industrial minerals mining and production and includes a field trip to Mosaic's Four Corners sedimentary phosphate mine, one of only four currently operating phosphate mines in the state.

Presentation at Society for Geology Applied to Mineral Deposits Conference

Karen Kelley presented work on the "Critical metals in black shales" project at the Society for Geology Applied to Mineral Deposits (SGA) Conference held in Nancy, France, August 24-27. The title of the paper and presentation was "Extent of metalliferous intervals and principal hosts of Mo, Ni, V, and Zn in oil shale of the Heath Formation, Montana, USA".

Presentations at 2015 Society of Economic Geologists Meeting

Warren Day, John Aleinikoff, Celeste Mercer, Corey Meighan, and Anne McCafferty are presenting their research on the characterization and origin of Iron Oxide-Copper-Gold-Rare Earth Element deposits in Missouri at the upcoming the Annual meeting of the Society of Economic Geology in Hobart, Tasmania, September 27-30, 2015. The meeting will bring together over 650 international scientists to discuss the latest research findings on world-class ore deposits. They will also attend a field excursion to the giant Olympic Dam ore deposit, which shares many characteristics as those of a similar type being studied by the USGS.

  • Shallow to deep crustal controls on localization of Mesoproterozoic iron oxide copper-gold-rare earth element deposits in southeast Missouri (USA): Evidence from gravity and magnetic data (Anne McCafferty, J. Phillips) - Presentation
  • Still stuck in the mud: Reevaluation of stratiform gold in the Upper Popovich Formation, northern Carlin trend, Nevada (Robert Scott, P. Emsbo, K. Goemann) - Presentation
  • Ore controls in the White Mountain breccia-hosted gold deposit, Jilin Province, northeastern China (Halley Keevil, T. Monecke, R. Goldfarb, G. Collins, T. Feng, T. Baker) – Presentation
  • Mineral and melt inclusion constraints on the petrogenesis of regional magmas and magnetite ore from the Pea Ridge (IOA-REE) and Boss Bixby (IOCG) deposits, USA (Celestine Mercer) – Poster

Participation at 11th International Meeting on Applied Isotope Geochemistry

Rich Wanty and Ian Ridley will be attending the 11th international meeting on Applied Isotope Geochemistry at the French Geological Survey in Orleans, France September 21-25. Wanty will deliver an invited keynote talk, “Isotopic insights into biological regulation of zinc in contaminated systems.” Ridley will present results of in situ measurement of sulfur isotopes using laser ablation. The meeting covers a spectrum of topics, including economic geology, biogeochemistry, climate change, hydrology, forensics, and instrument development.

Technical Announcement: Publication in Nature Communications

"Mutant" Fossils Reveal Toxic Metals May Have Contributed to World’s Largest Extinctions
Released: 8/31/2015 10:29:49 AM

New Publications - August 2015

Benson, M.E., and Wilson, A.B., 2015, Frac sand in the United States—A geological and industry overview: U.S. Geological Survey Open-File Report 2015–1107, 78 p., http://dx.doi.org/10.3133/ofr20151107.

du Bray, E.A., Holm-Denoma, C.S., San Juan, C.A., Lund, Karen, Premo, W.R., and DeWitt, Ed, 2015, Geochemical, modal, and geochronologic data for 1.4 Ga A-type granitoid intrusions of the conterminous United States: U.S. Geological Survey Data Series 942, 19 p., http://dx.doi.org/10.3133/ds942.

Mercer, C.N., 2015, Germanium—Giving microelectronics an efficiency boost: U.S. Geological Survey Fact Sheet 2015–3011, 2 p., http://dx.doi.org/10.3133/fs20153011.

Mercer, C.N., 2015, Indium—Bringing liquid-crystal displays into focus: U.S. Geological Survey Fact Sheet 2015-3012, 2 p., http://dx.doi.org/10.3133/fs20153012.

Pribil, M.J., Ridley, W.I., and Emsbo, Poul, 2015, Sulfate and sulfide sulfur isotopes (δ34S and δ33S) measured by solution and laser ablation MC-ICP-MS: An enhanced approach using external correction: Chemical Geology, 42, 27 September 2015, p. 99-106. http://dx.doi.org/10.1016/j.chemgeo.2015.07.014

Ridley, w.I., Pribil, M.J., Koenig, A.E., and Slack, J.F., 2015, Measurement of in Situ Sulfur Isotopes by Laser Ablation Multi-Collector ICPMS: Opening Pandora's Box: Procedia Earth and Planetary Science 13 (2015), p. 116-119. http://dx.doi.org/10.1016/j.proeps.2015.07.028

Vandenbroucke, Thijs R.A., Emsbo, Poul, Munnecke, Axel, Nuns, Nicholas, Dupponchel, Ludovic, Lepot, Kevin, Quijada, Melesio, Paris, Florentin, Servais, Thomas, and Kiessling, Wolfgang, 2015, Metal-induced malformations in early Palaeozoic plankton are harbingers of mass extinction: Nature Communications 6, Article number 7966, http://dx.doi.org/10.1038/ncomms8966.

Invited Talk on Erionite

On September 1, Brad Van Gosen will present an invited talk at the annual Resource Agency meeting of the U.S. Department of Transportation, Federal Highway Administration, to be held in Carson City, Nevada. His talk will provide an overview of naturally occurring asbestos and describe preliminary progress towards a national map showing potential for natural occurrences of asbestos and erionite.

Goldschmidt 2015 Participation, August 16-21, Prague, CZ

  • High Spatial Resolution SHRIMP and LA-ICPMS U-Pb Geochronology of Pea Ridge Fe-Ree-Au Deposit, USA (Presentation)
    Neymark, L., Aleinikoff, J., Holm-Denoma, C., Pietruszka, A., Pillers, R., & Moscati, R.
  • High Precision Pb Isotope Analyses by LA-MC-ICP-MS: A Novel Approach Using a USGS Synthetic Glass Spiked with NIST SRM 981(BPbISO-1) (Presentation)
    Pribil, M., Koenig, A., Wilson, S., Rutherford, D., & Ridley, I.
  • Silicate Weathering of Igneous Rocks, Elemental Mobility, and Sources of Chemical Solutes in Rivers of Panama (Poster)
    Wörner, G, Harmon, R.S., Pribil, M.J., & Lyons, W.B.
  • Petrology and Geochemical Evolution of Lavas from the Ongoing and Voluminous Puu Oo Eruption of Kilauea Volcano, Hawaii (Presentation)
    Garcia, M., Pietruszka, A., Marske, J., Norman, M., Rhodes, J.M., & Greene, A.
  • Invited: Cr Isotope Variability in the Oceans: Implications for the Cr Isotope Proxy (Presentation) Holmden, C., Scheiderich, K., Amini, M., & Francois, R.
  • Determination of Ce Isotope Ratios on the Nu Plasma II MC-ICP-MS Using a High-Gain Detection System (Poster)
    Zhao, Y., Scheiderich, K., & Pietruszka, A.
  • Invited: Do Hyperenriched Black Shales Correspond with Periods of Elevated Atmospheric O2? (Presentation)
    Large, R., Johnson, S., Kelley, K., Slack, J., & Coveney, R.

Visits to Phosphate Mines and Meeting with BLM

On August 3-4, as a part of her work on sedimentary phosphate deposits, Mary Ellen Benson visited two active phosphate mines in southeastern Idaho (Caribou County) and met with geologist Bill Stout of the BLM in Pocatello, who gave an overview of the current industry activity in the region. Simplot’s geologist Katie Wilkes provided a tour of their Smoky Canyon Mine, and Monsanto’s senior exploration geologist David Carpenter showed her the Blackfoot Bridge Mine.

New Publications - July 2015

Aleinikoff, J.N., Lund, Karen, and C. Mark Fanning, 2015, SHRIMP U-Pb and REE data pertaining to the origins of xenotime in Belt Supergroup rocks: Evidence for ages of deposition, hydrothermal alteration, and metamorphism: Canadian Journal of Earth Sciences, 52(9), p. 722-745, http://dx.doi.org/10.1139/cjes-2014-0239.

Johnson, M.R., Graham, G.E., Hubbard, B.E., and Benzel, W.M., 2015, Geospatial compilation of results from field sample collection in support of mineral resource investigations, Western Alaska Range, Alaska, July 2013: U.S. Geological Survey Data Series 943, 12 p., http://dx.doi.org/10.3133/ds943.

Presentation at 2015 ESRI International Users Conference

Stuart Giles is presenting at the 2015 ESRI International Users Conference, San Diego, CA, July 20-24. Giles will be an oral presentation: “The Afghanistan Hyperspectral Quadrangle Map Series”, and Map Gallery presentations including a poster: “Surface Minerals in the Hindu Kush Mountains, Takhar–Badakhshan–Parwan Provinces, Afghanistan” and several selections from the Hyperspectral Quadrangles of Afghanistan map series.

Geophysical Field Work in Western Alaska Ranges

Paul Bedrosian and Bethany Burton are in Lake Clark National Park and Preserve, Alaska through August 7 carrying out geophysical field work examining crustal structure and mineral resources within the Western Alaska Ranges. This work is part of a multi-disciplinary collaborative effort between the USGS Mineral Resources Program and researchers from the University of Alaska Fairbanks.

USGS Tour of Hydraulic Fracturing (Frac) Sand Mining Companies

Anna Wilson and Mary Ellen Benson were hosted by frac sand mining companies from July 7-16 as they toured the following mining operations: (1) Preferred Sands of Genoa's Loup River sand dredge site in Genoa, Nebraska; (2) U.S. Silica's mine in Pacific, Missouri; (3) Unimin's mines in Utica and Oregon, Illinois; (4) Superior Silica's Arland mine in Barron County, Wisconsin; (5) Fairmount-Santrol's mine at Maiden Rock, Wisconsin; (6) Pattison Sand's mine at Clayton, Iowa; and (7) South Dakota Proppants' permitted mining project in the Black Hills, South Dakota. At their Loup River stop in Nebraska, Anna and Mary Ellen were joined by USGS colleagues from the Midwest Region, Ron Zelt (Associate Director of NAWQA) and Bob Swanson (Director of Nebraska Water Science Center), who are part of the Midwest Region Energy and Mining Initiative that is working on projects that relate to frac sand mining.

New Publications - June 2015

Ellefsen, K.J., Van Gosen, B.S., Fey, D.L., Budahn, J.R., Smith, S.M., and Shah, A.K., 2015, First steps of integrated spatial modeling of titanium, zirconium, and rare earth element resources within the Coastal Plain sediments of the southeastern United States: U.S. Geological Survey Open-File Report 2015–1111, 40 p., http://dx.doi.org/10.3133/ofr20151111.

Graham, G.E., Taylor, R.D., and Buckley, S., 2015, Hydrogeochemical exploration—A reconnaissance study on northeastern Seward Peninsula, Alaska, in Dumoulin, J.A., ed., Studies by the U.S. Geological Survey in Alaska, vol. 15: U.S. Geological Survey Professional Paper 1814–A, 16 p., http://dx.doi.org/10.3133/pp1814A.

Graham, G.E., Taylor, R.D., Tripp, R.B., 2015,Targeting Cu-Au and Mo resources using multi-media exploration geochemistry: An example from Tyonek Quadrangle, Alaska Range, Alaska: Journal of Geochemical Exploration, 157, October 2015, p. 52-65. http://dx.doi.org/10.1016/j.gexplo.2015.05.014

Manning, A.H., Mills, C.T., Morrison, J.M., and Ball, L.B., in press, Insights into controls on hexavalent chromium in groundwater provided by environmental tracers, Sacramento Valley, California, USA: Applied Geochemistry, In Press, Available online 21 May 2015. http://dx.doi.org/10.1016/j.apgeochem.2015.05.010

Nadoll, P., Mauk, J.L., Leveille, R.A., and Koenig, A.E., 2015, Geochemistry of magnetite from porphyry Cu and skarn deposits in the southwestern United States: Mineralium Deposita, 50(4), p. 493–515. http://dx.doi.org/10.1007/s00126-014-0539-y

Taylor, R.D., Goldfarb, R.J., Monecke, Thomas, Fletcher, I.R., Cosca, M.A., and Kelly, N.M., 2015, Application of U-Th-Pb Phosphate Geochronology to Young Orogenic Gold Deposits: New Age Constraints on the Formation of the Grass Valley Gold District, Sierra Nevada Foothills Province, California: Economic Geology, 110(5), p. 1313-1337, http://dx.doi.org/ 10.2113/econgeo.110.5.1143.

Participation in Thorium Deposit and Resource Meeting

At the invited request of the International Atomic Energy Agency (IAEA), Brad Van Gosen will attend and participate in the consultancy conference Maintaining and Updating World Thorium Deposits and Resources. Brad will also serve on the thorium expert group that will finalize the IAEA Technical Report on World Thorium Deposits and Resources. The meeting will be held July 20–24, 2015, at IAEA headquarters in Vienna, Austria.

USGS and Office of Surface Mining Meeting

On May 28, USGS staff from the USGS USMIN project, National Map, and Core Science Systems met with Office of Surface Mining Reclamation and Enforcement (OSM) to discuss: how USGS and OSM are mapping mines in the U.S., future cooperation, and the possibility of including OSM mine mapping data in the National Map. Meeting outcomes were continuing regular communication between the USMIN project and OSM to share data and avoid duplication of work, and Core Science Systems/National Map staff got a better understanding of OSM’s work and whether it could be included in the National Map.

New Publications - May 2015

Hageman, P.L., Seal, R.R., Diehl, S.F., Piatak, N.M., and Lowers, H.A., 2015, Evaluation of selected static methods used to estimate element mobility, acid-generating and acid-neutralizing potentials associated with geologically diverse mining wastes: Applied Geochemistry, 57, June 2015, p. 125-139. http://dx.doi.org/10.1016/j.apgeochem.2014.12.007

Van Gosen, B.S., Book Review: Rare Earth Elements—A New Approach to the Nexus of Supply, Demand and Use: Exemplified Along the Use of Neodymium in Permanent Magnets: Economic Geology, 110(4), p. 1137-1138. http://dx.doi.org/10.2113/econgeo.110.4.1137

News Release on Frac Sand Article

Hydraulic Fracturing (Frac) Sand Sources and Production in the United States. Released May 27th.

USGS Participation on Environmental Protection Agency National Technical Review Workgroup

Michael Pribil was invited to serve on an Environmental Protection Agency (EPA) national technical review workgroup (TRW) to review the state of science on lead (Pb) source attribution and advance analytical procedures for determining source attribution for lead (Pb) contamination at superfund sites. The workgroup’s goal is to develop a fact sheet on analytical techniques and source attribution targeted towards On-Scene Coordinators to use a consistent framework to support decisions for lead-contaminated residential sites that are being addressed under Superfund authority. The TRW Kickoff Teleconference on 5 May included experts from EPA Regions, EPA Office of Research and Development (ORD), EPA National Enforcement and Investigation Center, Utah Department of Environmental Quality, Office of Superfund Remediation and Technology Innovation (OSRTI), and the Office of Solid Waste and Emergency Response (OSWER).

USGS Participation on American Chemical Society Scholars Program Selection Committee

Maria Montour participated on the 2015 Selection Committee for the American Chemical Society’s Scholars Program. Established in 1994, the Scholars Program awards renewable scholarships to underrepresented minority students who want to enter chemistry or chemistry-related fields, such as environmental science, toxicology, and chemical technology. As of December 2014, 2679 students have received a scholarship: 1512 students graduated with a chemical science bachelors degree, 42% continued on to graduate school, and 34% entered the chemical science workforce. American Chemical Society is anticipating the 130th scholar to obtain a PhD. Montour has been serving annually on the Committee since 1997.

Geological Society of Nevada 2015 Symposium Participation, 14-23 May, Reno, NV

USGS is co-hosting the symposium and USGS research is being presented at this quinquennial meeting. Society of Economic Geologists Forum on Diversity of Carlin-Style Gold Deposits:

  • Al Hofstra, An Overview of Carlin-Style Mineralization Outside the Great Basin
  • Poul Emsbo, Genesis of Carlin-Types: A RorschachTest
  • Chuck Thorman, The Metamorphic Core Complex Burial Problem: The Alfred Hitchcock Case of the Missing Rocks? [Luncheon Keynote Speaker]
  • Chuck Thorman, The Middle Jurassic Elko Orogeny in Nevada and Utah

New Publications - April 2015

Cole, C.J., Johnson, M.R., and Graham, G.E., 2014, Advanced Land Observing Satellite (ALOS) Phased Array Type L-Band Synthetic Aperture Radar (PALSAR) mosaic for the Kahiltna terrane, Alaska, 2007–2010: U.S. Geological Survey Scientific Investigations Map, 1 sheet, scale 1:1,000,000, http://dx.doi.org/10.3133/sim3323

Simpson, M.P., Strmic Palinkas, Sabina, Mauk, J.L., and Robert J. Bodnar, R.J., 2015, Fluid Inclusion Chemistry of Adularia-Sericite Epithermal Au-Ag Deposits of the Southern Hauraki Goldfield, New Zealand: Economic Geology, 110(3), p. 763-786, doi: 10.2113/econgeo.110.3.763.

Geological Society of America Cordilleran Section Meetimg

USGS scientists presented talks and posters at the Geological Society of America Cordilleran Section Meeting, May 11-13, Anchorage AK.

  • Refining the Characteristics, Age, and Extent of the Permian Klondike Assemblage in Eastern Alaska (Jones, J.V., III, Caine, J.S., Holm-Denoma, C.S., Lease, R.O., Saltus, R.W., and Todd, E.)
  • Formation of the Kahiltna Basin, Alaska, by Time-Transgressive Early to Late Cretaceous Dextral-Oblique Juxtaposition of Two Independent Depositional Systems (Karl, S.M., Box, S.E., Lease, R.O., Jones, J.V., III, Holm-Denoma, C., Bradley, D., Haeussler, P.J.)
  • New 1:250,000 Geologic Map of the Western Alaska Range: Portions of the Lime Hills, McGrath, Talkeetna and Tyonek Quadrangles (Box, S.E., Jones, J.V., III, Todd, E., Karl, S.M., Dumoulin, J.A., Ayuso, R.A., Haeussler, P.J., Bradley, D.W., Graham, G., Lease, R.O.)
  • Elemental Distribution in the Alaskan Landscape (Wang, B., Yager, D.B., Lee, G., Ellefsen, K.J., Granitto, M., Hults, C.P., Rockwell, B.W., Mauk, J.L.)

Invited Talk on Rare Earth Elements

On April 15, USGS scientist Philip Verplanck gave an invited talk for the Society of Economic Geologists student chapter at the Colorado School of Mines entitled "Rare earth element and niobium mineralization in carbonatites."

Presentations at 27th International Applied Geochemistry Symposium

Karen Kelley presented "Overview of porphyry Cu indicator minerals" as part of a short course at the 27th International Applied Geochemistry Symposium (April 20-24) in Tucson, AZ. David B. Smith delivered an oral presentation, "Mapping the soil geochemistry and mineralogy of the conterminous United States—Evolution and successful completion of a continental-scale government-sponsored survey". He also participated in a meeting of the Steering Committee for the International Union of Geological Sciences’ Task Group on Global Geochemical Baselines. Jeff Mauk delivered a presentation entitled "How quickly do soil gas anomalies form? Constraints from the Golden Cross deposit, New Zealand".

USGS Scientist Serves as U.S. Delegate on Multinational Resource Classification Group

At the request of the International Atomic Energy Agency (IAEA), Brad Van Gosen will serve as the U.S. delegate in the 6th Session of the Expert Group on Resource Classification, held April 29 to May 1, 2015, at the Palais des Nations in Geneva, Switzerland. On April 27–28, Brad will contribute to a multi-national group of uranium and thorium resource experts organized by the IAEA, also meeting in Geneva, to prepare a guidebook to classify these resources. Brad serves as the chief editor and a coauthor of this guidebook.

USGS Participation at the 27th International Applied Geochemistry Symposium

USGS scientists are presenting minerals-related research at the 27th International Association of Applied Geochemistry Symposium, April 20-24, in Tucson, AZ. Richard Wanty is giving an invited 1-hour talk at a short course, "Using metal isotopes in mining-environmental applications". Kathy Smith will be giving a keynote presentation, “Potential Metal Recovery from Waste Streams,” and Steven Smith will be presenting “Levelling and Merging of Two Discrete National-Scale Geochemical Databases: A Case Study Showing the Surficial Expression of Metalliferous Black Shales”.

Presentation at Volcano Hazards Team Seminar Series

Celeste Mercer gave a talk for the March 11 Geology, Minerals, Energy, & Geophysics seminar series at Menlo Park entitled, "Pre-eruptive conditions of the Hideaway Park topaz rhyolite: Insights into metal source and evolution of magma parental to the Henderson Porphyry Molybdenum Deposit, Colorado". The talk was webcast and is archived at the Volcano Hazards Team Seminar Series website: http://volcanoes.usgs.gov/vhp/seminar/seminar15.php. The direct link to the talk is: http://media.wr.usgs.gov/vhz/VHZ_11mar15.mp4.

Department of the Interior Meritorious Service Award Presented to USGS Scientist

Philip Verplanck will receive the Department of the Interior Meritorious Service Award in a ceremony at the National Center, May 5, for his numerous contributions to the economic geology of critical minerals and to environmental geochemistry.

New Publications - March 2015

Grauch, V.J.S., Skipp, G.L., Thomas, J.V., Davis, J.K., and Benson, M.E., 2015, Sample descriptions and geophysical logs for cored well BP-3-USGS, Great Sand Dunes National Park and Preserve, Alamosa County, Colorado: U.S. Geological Survey Data Series 918, 53 p., http://dx.doi.org/10.3133/ds918.

Eppinger, R.G., Giles, S.A., and Klein, T.L., 2015, Geochemical maps of stream sediments in central Colorado, from New Mexico to Wyoming: U.S. Geological Survey Open-File Report 2015–1025, 120 p., http://dx.doi.org/10.3133/ofr20151025.

Barineau, Clinton, Tull, J.F., and Holm-Denoma, C.S., 2015, A Laurentian margin back-arc: The Ordovician Wedowee-Emuckfaw-Dahlonega basin: Field Guides, 39, p. 21-78, doi:10.1130/2015.0039(02).

Jones, J.V., III, Karl, S.M., Labay, K.A., Shew, N.B., Granitto, M., Hayes, T.S., Mauk, J.L., Schmidt, J.M., Todd, E., Wang, B., Werdon, M.B., and Yager, D.B., 2015, GIS-based identification of areas with mineral resource potential for six selected deposit groups, Bureau of Land Management Central Yukon Planning Area, Alaska: U.S. Geological Survey Open-File Report 2015–1021, 78 p., 5 appendixes, 12 pls., http://dx.doi.org/10.3133/ofr20151021.

Fleck, R.J., du Bray, E.A., John, D.A., Vikre, P.G., Cosca, M.A., Snee, L.W., and Box, S.E., 2015, Geochronology of Cenozoic rocks in the Bodie Hills, California and Nevada: U.S. Geological Survey Data Series 916, 26 p., http://dx.doi.org/10.3133/ds916.

Geological Society of America Northeastern Section Meeting Participation, 23-25 March 2015, Bretton Woods, NH

  • New SHRIMP U-Pb Zircon Ages for Felsic Ammonoosuc Volcanics, Northern NH-VT (Aleinikoff, J.N., Rankin, D.W., Moench, R.H., Walsh, G.J.)
  • Unravelling the Prolonged History of the Ganderian Margin of Southeastern New England (Walsh, G.J., Aleinikoff, J.N., Wintsch, R.P., Ayuso, R.A., McAleer, R.J., Merschat, A.J.)
  • Late Pre-Cambrian Continental Rifting in the Southern Blue Ridge, VA-NC-TN, Revisited: Honoring 50 Years of Doug Rankin’s Contributions to Appalachian Geology (Merschat, A.J., Holm-Denoma, C.S., Southworth, S., Mundil, R.)

Geological Society of America Southeastern Section Meeting Participation, 19-20 March 2015, Chattanooga, TN

  • Alleghanian Disassembly of the Eastern Blue Ridge Ordovician Back-Arc Basin: Perspectives from the Mulberry Rock Recess (34°N), Northwest Georgia (Tull, J.F., Holm-Denoma, C.)
  • Ordovician Events in the Southern Appalachians: Synthesizing the Igneous, Sedimentary, and Metamorphic Record of the Taconic Orogeny (Barineau, C.I., Tull, J.F., Holm-Denoma, C.S.)
  • New Geologic Mapping and Geophysical Surveys in the Epicentral Region of the 2011 Mineral, Virginia Earthquake (Burton, W.C., Harrison, R.W., Spears, D.B., Shah, A.K., Evans, N.H., Horton, J.W., Carter, M.W.)

USGS Scientist Interviewed About Paper on Kilauea Magmas by Hawaiian Newspaper

Aaron Pietruszka was interviewed on March 13 by the Dan Nakaso, Star Advertiser, about his recently published study, “Two magma bodies beneath the summit of Kilauea Volcano unveiled by isotopically distinct melt deliveries from the mantle,” in Earth and Planetary Science Letters. The Star Advertiser published an article, “Lava supplied by 2 sources,” on March 16.

Karen Kelley 2015 Thayer-Lindsley Visiting Lecturer for the Society of Economic Geologists

Karen Kelley was chosen by the Society of Economic Geologists (SEG) as the 2015 Thayer-Lindsley Visiting Lecturer. Her duties will include presenting her research on the Pebble, Red Dog, and Howards Pass Deposits for students at several universities around the country and internationally over the course of the year. https://www.segweb.org/SEG/About_SEG/Lecturer_Series/SEG/_About_SEG/_Lecturer_Series/Thayer_Lindsley_Visiting_Lecturer.aspx

USGS Scientists Activities in China

Karen Kelley, Craig Johnson, Julie Dumoulin, and John Slack, are attending a field workshop with Chinese colleagues from March 20 to April 3. The collaborative research is part of a USGS project that is focused on the processes of enrichment of critical metals (nickel, molybdenum, platinum group elements, vanadium) in carbonaceous black shales. Three days will be spent with colleagues/collaborators at the Chinese Academy of Geological Sciences (CAGS) in Beijing followed by visits to polymetallic shale deposits in Guizhou and Jiangxi Provinces. Karen, Craig, Julie, and John will present their research on metalliferous shales in Montana and Alaska, USA at the CAGS as well as the Chinese Geological University in Beijing (CUGB) and Chinese Academy of Sciences in Beijing and Guangzhou.

USGS Participation at the 46th Lunar and Planetary Science Conference March 16-20, The Woodlands, TX

Szynkiewicz, Anne, Goff, F., Faiia, A.M., Vaniman, D.T., Subia, T., Sanchez, D., Coleman, J., Pribil, M.J., 2015, Aqueous sulfur budget and oxidation of fumarolic H2S in the volcanic complex of Valles Caldera, New Mexico – geochemical implications for mars (http://www.hou.usra.edu/meetings/lpsc2015/pdf/1303.pdf). [PDF file, 216 KB]

New USGS Paper on Kilauea Science Featured in Live Science

Aaron Pietruszka’s recently published study, “Two magma bodies beneath the summit of Kilauea Volcano unveiled by isotopically distinct melt deliveries from the mantle,” in Earth and Planetary Science Letters, “ was featured in Becky Oskin’s March 5 article in Live Science, “Double the Trouble Found Under Hawaii’s Kilauea Volcano.” Article at http://www.livescience.com/50036-hawaii-kilauea-volcano-lava-sources.html. [Update from 2/25/15 submittal]

USGS Laboratory Collaboration with Environmental Protection Agency on Superfund Sites

Michael Pribil’s recent collaborative report with Environmental Protection Agency (EPA) National Enforcement Investigations Center (NEIC) on a Super Fund investigation for EPA Region V, and work with EPA Region II investigating a Staten Island, NY Superfund site, resulted in a February 25 teleconference call with Kirk Schekel, EPA Office of Research and Development (ORD). Pribil was asked to assist with a Super Fund investigation in Region VII using Pb and Zn isotope ratios and other analytical techniques to conduct a source receptor study for the site. Pribil was also asked to write a review article on Pb isotope analyses and how Pb isotopes have been implemented in recent apportionment studies. The report lays the foundation for establishing a larger collaboration between EPA ORD and EPA Regions and the USGS multicollector (MC-ICP-MS) lab.

Invited Presentation at Geological Society of America Northeastern Section Meeting

John Aleinikoff is giving an invited presentation, “New SHRIMP U-Pb zircon ages for felsic Ammonoosuc Volcanics, northern NH-VT” at the Geological Society of American Northeastern Section Meeting, March 23-25, Bretton Woods, NH. U-Pb geochronology was used to date the Ordovician Ammonoosuc Volcanics to reconcile previously disparate interpretations of metamorphosed Paleozoic rocks in the Upper Connecticut Valley.

New Publications - February 2015

Lund, Karen, Box, S.E., Holm-Denoma, C.S., San Juan, C.A., Blakely, R.J., Saltus, R.W., Anderson, E.D., and DeWitt, E.H., 2015, Basement domain map of the conterminous United States and Alaska: U.S. Geological Survey Data Series 898, 41 p., http://dx.doi.org/10.3133/ds898.

Fordham, M.A. and Montour, M.R., 2015, U.S. Geological Survey activities related to American Indians and Alaska Natives—Fiscal years 2009 and 2010: U.S. Geological Survey Circular 1403, 112 p., http://dx.doi.org/10.3133/cir1403.

du Bray, E.A., Wilson, A.B., and Van Gosen, B.S., 2015, Geochemical and petrographic data for intrusions peripheral to the Big Timber stock, Crazy Mountains, Montana: U.S. Geological Survey Data Series 895, 19 p., http://dx.doi.org/10.3133/ds895.

John, D.A., du Bray, E.A., Box, S.E., Vikre, P.G., Rytuba, J.J., Fleck, R.J., and Moring, B.C., 2015, Geologic map of the Bodie Hills, California and Nevada: U.S. Geological Survey Scientific Investigations Map 3318, 64 p., 2 sheets, scale 1:50,000, http://dx.doi.org/10.3133/sim3318.

USGS Presentations at Society of Mining, Metallurgy, & Exploration Society Conference 2015

On February 16, USGS presented talks about frac sand research at the Society of Mining, Metallurgy, & Exploration (SME) annual meeting, Denver, CO. Mary Ellen Benson’s talk was “A Geological Overview of Frac Sand in the United States,” and Anna Wilson’s talk was “Where in the United States is the Naturally Occurring Frac Sand?”.

USGS Scientist Interviewed by Live Science About Kilauea Lavas

Aaron Pietruszka was interviewed February 19 by Becky Oskin, “Live Science” website, about his recent Earth and Planetary Science Letters paper on the Kilauea Volcano. They discussed the lead isotopic evolution of Kilauea lavas from 1959 to present, and the evidence for two small magma bodies beneath the summit of the volcano. Oskin is going to write an article on this topic and it’s expected to appear online in a few weeks.

USGS Collaboration with EPA on Superfund Investigation

Michael Pribil coauthored a technical report in support of an open superfund investigation that was released to Environmental Protection Agency (EPA) Region V on February 9. The report was in collaboration with EPA’s National Enforcement Investigations Center (NEIC) and concludes a two-year source receptor study which implemented scanning electron microscope (SEM), trace metal composition, and lead isotope ratio analyses of source material, air filters and soils from Pilsen neighborhood, Chicago, IL. More information regarding the area of interest can be found at: http://articles.chicagotribune.com/2011-04-01/health/ct-met-pilsen-lead-problems-20110331_1_lead-pollution-lead-poisoning-perez-elementary-school.

USGS Asbestos Science Mentioned in Earth Magazine

Brad Van Gosen is quoted regarding asbestos occurrence and asbestos-forming environments in the Earth Magazine March 2015 cover story, “Asbestos found in Nevada and Arizona: Roadblock and potential health hazard?” http://www.earthmagazine.org/article/asbestos-found-nevada-and-arizona-roadblock-and-potential-health-hazard

New Publications - January 2015

Pietruszka, A.J., Heaton, D.E., Marske, J.P., and Garcia, M.O., 2015, Two magma bodies beneath the summit of Kilauea Volcano unveiled by isotopically distinct melt deliveries from the mantle: Earth and Planetary Science Letters 413, p. 90-100, http://dx.doi.org/10.1016/j.epsl.2014.12.040.

Gray, J.E., Theodorakos, P.M., Fey, D.L., and Krabbenhoft, D.P., 2014, Mercury concentrations and distribution in soil, water, mine waste leachates, and air in and around mercury mines in the Big Bend region, Texas, USA: Environmental Geochemistry and Health, v. 37, no. 1, p. 35-48, doi: 10.1007/s10653-014-9628-1.

Gray, J.E., Van Metre, P.C., Pribil, M.J., and Horowitz, A.J., 2015, Tracing historical trends of Hg in the Mississippi River using Hg concentrations and Hg isotopic compositions in a lake sediment core, Lake Whittington, Mississippi, USA, Chemical Geology, v. 395, p. 80-87, http://dx.doi.org/10.1016/j.chemgeo.2014.12.005.

USGS Scientist Emeritus Recipient of AIME Hal Williams Hardinge Award

USGS emeritus William (Bill) Langer has been selected as recipient for the 2015 American Institute of Mining, Metallurgical, and Petroleum Engineers (AIME) Hal Williams Hardinge Award “for his extraordinary contribution to the science and sustainable development of industrial minerals and aggregates.” Langer worked for the USGS from 1971 to 2012, and served as the USGS resource geologist for aggregates since 1976. From SME News – AIME Awards, Mining Engineering Magazine, January 2015, p. 54 (http://me.smenet.org/).

Top

2014

New Publication - December 2014

Harper, Martin, Van Gosen, Bradley, Crankshaw, O.S., Doorn, S.S., Ennis, T.J., and Harrison, S.E., 2014, Characterization of Lone Pine, California, tremolite asbestos and preparation of research material: Annals of Occupational Hygiene, Advance Access article first published online September 29, 2014, 13 p., doi: 10.1093/annhyg/meu074.

USGS Presentations at Frac Sand Insider 2014 Conference Released Online

USGS presentations at the Frac Sand Insider Conference 2014 have been released online: Mary Ellen Benson – “A Geological Overview of Frac Sand in the United States[PDF, 2.8 MB], and Anna Wilson – “Where in the U.S. is the naturally-occurring Frac Sand?[PDF, 3.9 MB]. Their presentations focused on the geology and location of frac sand deposits.

Hyperspectral Surveys Presentation at Esri 2014 Southwest User Conference

Stuart Giles attended the Environmental Systems Research Institute (Esri) 2014 Southwest User Conference in Santa Fe, NM, on December 2-4, and gave a talk titled Potential for Regional Hyperspectral Imaging Surveys in the American Southwest.

Participation at American Geophysical Union 2014 Fall Meeting

USGS scientific research from minerals-funded science centers is being presented in over 60 talks and posters at the American Geophysical Union (AGU) 2014 Fall Meeting, December 15-19, San Francisco, CA. The wide-ranging topics of planned AGU posters and talks can be found at http://minerals.usgs.gov/documents/AGU-Dec2014-MRPandSC-participation.pdf. [PDF file, 902 KB]

National Science Foundation Review Panel

Ian Ridley recently sat on a National Science Foundation panel to review research proposals submitted to the Marine Geology and Geophysics Panel and Chemical Oceanography Panel. The proposals covered a wide range of subjects in marine geosciences, including requests for University-National Oceanographic Laboratory System (UNOLS) ship time and science in support of the Integrated Ocean Drilling Program (IODP).

New Publication - November 2014

Emsbo, Poul, McLaughlin, P.I., Breit, G.N., du Bray, E.A., and Koenig, A.E., in press, Rare Earth Elements in Sedimentary Phosphate Deposits: Solution to the Global REE Crisis?: Gondwana Research, (available online 5 November 2014), doi: 10.1016/j.gr.2014.10.008.

USGS Scientist Teaching Gold Deposit Class in Columbia

Rich Goldfarb will be teaching a class, “The Geology of Gold Deposits,” at the Universidad Industrial de Santander in Bucaramanga, Colombia, December 2-4. The university's student chapter of Society of Geology Applied to Mineral Deposits (SGA) is sponsoring the 3-day class, which covers all types of gold deposits.

USGS Thorium Work Featured in Nuclear Cafe Blog

The American Nuclear Society’s ANS Nuclear Cafe November 14 blog “Thorium shines brightly at ANS Winter Meeting” mentions the USGS paper, Thorium Recovery from Rare Earth Element Deposits in the US (Bradley Van Gosen, Steven Krahn, Timothy Ault). The USGS paper, presented by Ault, discusses thorium’s abundance in the U.S. sinc thorium is found in rare earth elements deposits.

Participation in Denmark and Greenland Mineral Resource Assessment Workshop

Rich Goldfarb is an invited overseas expert to a meeting, "Assessment of the orogenic gold potential of Greenland," November 19-21, in Copenhagen, Denmark. The Geological Survey of Denmark and Greenland (GEUS) is sponsoring the mineral resource assessment workshop. Rich will be presenting an overview of gold deposit geology and helping to define favorable tracts for future resource discovery throughout exposed parts of Greenland.

New Publications - October 2014

Cosca, M.A., 2014, Potassium-Argon (Argon-Argon), Structural Fabrics, in Rink, W.J., and Thompson, J., editors, Encyclopedia of Scientific Dating Methods: Springer Netherlands, p. 1-8, doi: 10.1007/978-94-007-6326-5_124-1.

Gray, J.E., Hines, M.E., Goldstein, H.L., and Reynolds, R.L., 2014, Mercury deposition and methylmercury formation in Narraguinnep Reservoir, southwestern Colorado, USA: Applied Geochemistry, v. 50, p. 82-90. DOI: 10.1016/j.apgeochem.2014.09.001.

New Fact Sheet on Rare Earth Elements

Van Gosen, B.S., Verplanck, P.L., Long, K.R., Gambogi, Joseph, and Seal, R.R., II, 2014, The rare-earth elements—Vital to modern technologies and lifestyles: U.S. Geological Survey Fact Sheet 2014–3078, 4 p., http://dx.doi.org/10.3133/fs20143078

Participation in Chinese Mineral Deposit Workshop

Rich Goldfarb will be helping teach the 9th Annual China Mineral Deposits and Exploration Workshop in Fujian, China, during the week of November 9-15. The workshop will have over 300 attendees from throughout China, and will include both lecture and laboratory components. The Government of the People's Republic of China, the Society of Economic Geologists (SEG), and the Society of Geology Applied to Mineral Deposits (SGA) sponsor the workshop.

Presentations at Frac Sand Insider 2014 Conference

USGS geologists Mary Ellen Benson and Anna Wilson are presenting summary information and map products from their investigation of frac sand (used as a proppant in hydraulic fracturing of petroleum reservoirs) at the Frac Sand Insider 2014 Conference and Exhibition in Pittsburgh, Pennsylvania, November 16-18. The presentations, “Where in the United States is the naturally occurring Frac Sand?” (Wilson) and “A Geological Overview of Frac Sand in the United States” (Benson) generated advance interest and they were invited to contribute an article to a future issue of Rock Products, a publication for the aggregate industry.

Mineral Deposit Database Briefings for BLM and House Committee

Greg Fernette will be meeting with BLM Assistant Director Michael Nedd and Solid Minerals Program Chief Mitchell Leverette October 27-28, and briefing Committee Staff of the U.S. House Committee on Natural Resources, on the USGS Mineral Deposit Database Project (USMIN). The objective of the project, which started in 2012, is to develop a comprehensive geospatial database of the mines, mineral deposits and mineral regions of the U.S. BLM is providing funds to assist the Project under an Interagency Agreement between BLM and USGS, which is administered by the BLM Solid Minerals Program and the USGS Mineral Resources Program.

Participation at Thorium Conference

Brad Van Gosen, at the invitation of the International Atomic Agency (IAEA), will participate in the consultancy conference, "Maintaining and Updating Thorium Resources Information System (ThDEPO)", and also contribute to finalizing the "IAEA Technical Report on World Thorium Deposits and Resources". The meeting will be held October 28–30, 2014, at the IAEA headquarters in Vienna, Austria.

Communicating about Soil Geochemistry

David B. Smith will present USGS soil geochemical research at the 30th Annual International Conference on Soils, Sediments, Water, and Energy in Amherst, MA, Oct. 20-23, 2014. His oral presentation, “Arsenic in soils of the conterminous United States: Results from the new national-scale soil geochemical study by the U.S. Geological Survey,” will be accompanied by two poster presentations, “Distribution of Pb, Cd, Cr, Cu, Zn, Ni, and Ba in soils of the conterminous United States,” and “Phosphorus in soils of the Upper Midwest, United States”.

Field Workshop in Poland

Karen Kelley will be joining a group of scientists for a field workshop in Poland from October 19-23. They will visit the Kupferschiefer shale-hosted Cu deposit and the Wieliczka salt mine. Other participants are from the Czech Republic Geological Survey and the University of Technology in Krakow, Poland.

Meetings on Improving Analytical Chemistry Facilities

Ian Ridley will be travelling with Greg Delzer (USGS South Dakota Water Science Center) to Kabul, Afghanistan October 14-25, to meet with the Afghan Geological Survey and World Bank and discuss progress toward improving the analytical chemistry facilities at Afghan Geological Survey. This is part of a wide-ranging program initiated by the DoD Task Force for Business and Stability Operations that has an impressive history of USGS involvement.

Ian Ridley and Aaron Pietruszka recently returned from a successful visit to Nu Instruments to discuss requirements for the new isotope instrument being built at their UK factory. The instrument will be delivered mid-2015 and housed in the new isotope facilities in Buiding 95, Denver Federal Center.

Participation at Society of Economic Geologists 2014 Meeting

Al Hofstra attended the Society of Economic Geologists 2014 meeting on September 27-30 in Keystone, Colorado where he gave a presentation on "Advanced argillic lithocaps above Climax-type Mo porphyries? Evidence from porphyry clusters in New Mexico, Utah and Colorado" coauthored by Mike Cosca and Barnaby Rockwell.

Presentations at International Mineralogical Association General Meeting

Jeff Mauk attended the 21st General Meeting of the International Mineralogical Association September 1-5, in Johannesburg South Africa. He presented two papers "Nuggets to nanoscale: The distribution of Au in adularia-sericite epithermal deposits", coauthored by Alan E. Koenig, Andrew H. Menzies, Sarah J. Fyfe, Alicia A. Newton, and Heather A. Lowers, and "Controls on regional gaps in sediment-hosted stratiform copper mineralization: Evidence from the Midcontinent Rift System, USA", coauthored by Laurel Woodruff.

New Publications - September 2014

Van Gosen, B.S., Fey, D.L., Shah, A.K., Verplanck, P.L., and Hoefen, T.M., 2014, Deposit model for heavy-mineral sands in coastal environments: U.S. Geological Survey Scientific Investigations Report 2010–5070–L, 51 p., http://dx.doi.org/10.3133/sir20105070L.

du Bray, E.A., 2014, Geochemical and modal data for igneous rocks associated with epithermal mineral deposits: U.S. Geological Survey Data Series 875, 13 p., http://dx.doi.org/10.3133/ds875.

Partication in Canada Foundation for Innovation Expert Committee

Robert Eppinger, emeritus, was asked by the Canada Foundation for Innovation to serve as a member of an Expert Committee for the 2015 cycle of the Earth and Space Science Innovation Fund competition and participated in the committee’s August 28th meeting in Toronto, ON. Larry Meinert was also one of the committee members.

Participation at Chinese Ore Deposit Meeting

Philip Verplanck presented a paper at the International Association for the Genesis of Ore Deposits in Kunming, China, on August 19, 2014 entitled “Rare earth element enrichments in the Elk Creek Carbonatite, Nebraska, USA” and was invited to spend a week working at the Maoniuping deposit, the world’s second largest rare earth element deposit.

Invited Lectures in New Mexico

Mike Cosca is traveling to New Mexico to present invited lectures at the University of New Mexico and the New Mexico Institute of Technology (Sept. 11-12). Mike will present research results on the timing of volcanic activity in New Mexico and Colorado and significance to the tectonic evolution of the Rio Grande Rift corridor. The talks will present collaborative research with GEC scientists Ren Thompson and Kenzie Turner and highlight recent discoveries andbroader geologic implications for these areas.

Invited Presentations and Short Courses in China

Rich Goldfarb will be giving an invited talk at the China Gold Congress 2014, September 10-12, and a keynote talk at the 2014 International Association for Gondwana Research Annual Convention on September 19-21, both in Beijing, China. Rich will also be presenting short courses on gold geology at Hong Kong University and at China University of Geosciences Beijing.

Scientist Recipient of Kutina-Smirnov Medal

Rich Goldfarb was the initial recipient of the Kutina-Smirnov Medal awarded at the General Assembly of the International Association for the Genesis of Ore Deposits in Kunming, China, on August 20th. The award is in recognition of outstanding contributions in the field of economic geology.

Special Conference Publication of Economic Geology

Karen Kelley and Howard Golden (Rio Tinto) completed editing a Special Publication of Economic Geology (in print by end of September, 2014) for the Society of Economic Geologist's Conference titled "SEG 2014: Building Exploration Capability for the 21st Century". The volume contains 16 papers that bring together work focusing on four broad themes: Fundamental Advances in Economic Geology, Deposit Footprints and Mineral System Science, Innovations in Exploration Technology and Exploration Targeting, and Case Studies of Exploration Success. Contact: Karen Kelley, kdkelley@usgs.gov

Article on Soil Geochemistry Maps

American Chemical Society’s magazine, Chemical and Engineering News, published an article about the USGS Soil Geochemical Landscapes project and their newly released soil maps: Schmidt, Charles, 2014, Digging Up the Dirt: Chemical and Engineering News, 92 (32), p. 21-22, http://cen.acs.org/articles/92/i32/Digging-Dirt.html. Contact: Dave Smith, dsmith@usgs.gov

New Publications - August 2014

Ratte, J.C., Gaskill, D.L., and Chappell, J.R., 2014, Geologic map of the Gila Hot Springs 7.5' quadrangle and the Cliff Dwellings National Monument, Catron and Grant Counties, New Mexico: U.S. Geological Survey Open-File Report 2014–1036, http://dx.doi.org/10.3133/ofr20141036.

De Giudici, G., Wanty, R.B., Podda, F., Kimball, B.A., Verplanck, P.L., Lattanzi, P., Cidu, R., and Medas, D., 2014, Quantifying biomineralization of zinc in the Rio Naracauli (Sardinia, Italy), using a tracer injection and synoptic sampling: Chemical Geology, 384, September 2014, p. 110-119, http://dx.doi.org/10.1016/j.chemgeo.2014.07.002.

Presentation at 2014 Critical Minerals Conference

Philip Verplanck presented a paper on August 5, 2014 at the 2014 Critical Minerals Conference in Denver entitled: "Rare earth element and niobium mineralization in the Elk Creek Carbonatite, S.E. Nebraska” by Philip L. Verplanck, Michael Blessington, Richard M. Kettler, G. Lang Farmer, Heather A. Lowers, and Alan E. Koenig.

Invited Presentation and Workshop at International Association on the Genesis of Ore Deposits

Richard Goldfarb has been invited by the 14th Quadrennial International Association on the Genesis of Ore Deposits (IAGOD) Symposium organizers to be one of the symposium’s six plenary speakers. The symposium will be in Kunming, China, August 19-22, and his plenary talk is "Orogenic Gold: Regional Perspectives, Space-Time Correlations, and the Changing Definition of Ore”. Rich will also present a keynote talk on the metallogeny of Alaska in a session on ore deposits in active continental margins. In addition, he will run a pre-meeting workshop, “Classes of mineral deposit models and their exploration criteria,” and will run a post-meeting field trip, “Au depsosits in Jiadong area, Shandong Province,” China’s largest gold province on the Jiaodong Peninsula. Information about IAGOD 2014 is at http://www.14iagod.org/en/index.asp.

Review Panelist for Oil Spill Research Proposals

Ian Ridley will be a panelist at Consortium for Ocean Leadership, Washington, DC, August 3-5, to review proposals submitted to the Gulf of Mexico Research Initiative funded through British Petroleum for research related to the Deepwater Horizon oil spill. Information about the Gulf of Mexico Research Initiative is at http://gulfresearchinitiative.org/.

New Publications - July 2014

Taylor, R.D., Graham, G.E., Anderson, E.D., and Selby, David, 2014, Timing of ore-related magmatism in the western Alaska Range, southwestern Alaska: U.S. Geological Survey Open-File Report 2014–1115, 25 p., http://dx.doi.org/10.3133/ofr20141115.

Berger, B.R., Mars, J.C., Denning, P.D., Phillips, J.D., Hammarstrom, J.M., Zientek, M.L, Dicken, C.L., and Drew, L.J., with contributions from Alexeiev, D., Seltmann, R., and Herrington, R.J., 2014, Porphyry copper assessment of western Central Asia: U.S. Geological Survey Scientific Investigations Report 2010–5090–N, 219 p., 8 plates, and spatial data, http://dx.doi.org/10.3133/sir20105090N.

Tull, J., Holm-Denoma, C.S., and Barineau, C.I., 2014, Early to Middle Ordovician back-arc basin in the southern Appalachian Blue Ridge: Characteristics, extent, and tectonic significance: Geological Society of America Bulletin, 126(7-8), p. 990-1015, http://dx.doi.org/10.1130/B30967.1.

Briefings on Soil Geochemical Maps

On June 27, USGS scientist David B. Smith conducted a briefing in Washington, D.C. for the U.S. Office of Science and Technology Policy. The subject of the briefing was the recently released geochemical and mineralogical maps for soils of the conterminous United States. Information about the soil maps is at http://minerals.usgs.gov/science/soil-survey.html.

Collaboration with EPA

Mike Pribil participated in two EPA Region V technical and legal meetings with Chicago city officials, Burlington Northern Santa Fe (BNSF) Railroad, H. Kramer, and EPA National Enforcement Investigations Center (NEIC). Preliminary lead isotope, trace metal, and SEM data were presented for samples collected in the Pilsen neighborhood adjacent to a railroad line and a brass and bronze foundry. The meetings followed the publication of a US EPA/USGS interim report, which addressed elevated lead in the Pilsen neighborhood. A final analytical report is scheduled for publication in late September 2014. http://epa.gov/region5/cleanup/pilsenareasoils/

Geophysical Airborne Survey in Alaska

USGS scientists will conduct a high-resolution airborne survey in July to study the mineral distribution in different rock formations in various parts of Alaska. An imaging spectrometer and a digital camera on the aircraft will collect detailed information about the composition of surficial rocks, soils, and vegetation covering the study areas. Concurrent field activities will occur to support the airborne survey and collect geologic materials (G. Graham, T. Hoefen, T. King, K. Kelley, and R. Kokaly). The data from this hyperspectral survey will be integrated with geologic, geochemical, and geophysical data for studying links between past geologic processes and mineral resource potential. The Mineral Resources Program is conducting the project.

Invited Presentation at Uranium Symposium

Brad Van Gosen will present an invited paper and coauthor another presentation at the International Symposium on Uranium Raw Material for the Nuclear Fuel Cycle: Exploration, Mining, Production, Supply and Demand, Economics and Environmental Issues (URAM-2014), at the International Atomic Energy Agency (IAEA) headquarters in Vienna, Austria, from June 23 to 27. His paper is "Thorium recovery as a co-product of processing rare earth element deposits". URAM 2014 information is at http://www-pub.iaea.org/iaeameetings/46085/International-Symposium-on-Uranium-Raw-Material-for-the-Nuclear-Fuel-Cycle-Exploration-Mining-Production-Supply-and-Demand-Economics-and-Environmental-Issues.

Invited Speaker at 2014 UNESCO Conference

Rich Goldfarb was an invited speaker at the 2014 UNESCO International Conference on Engineering Science and Technology in Beijing, China, June 2-3. This year's host for the conference, which included an address from President Xi Jinping of China, was the Chinese Academy of Engineering and the conference theme was Engineering and the Future of Humankind. Rich's talk was on "Sustainable Gold Mining in a Developing World" and he also chaired the session on Sustainable Development of Energy and Mining Engineering.

New Publications - June 2014

Swayze, G.A., Clark, R.N., Goetz, F.H., Livo, K.E., Breit, G.N., Kruse, F.A., Sutley, S.J., Snee, L.W., Lowers, H.A., Post, J.L., Stoffregen, R.E. and Ashley, R.P., 2014, Mapping advanced argillic alteration at Cuprite, Nevada using imaging spectroscopy: Economic Geology, 109 (5), p. 1179-1221, doi:10.2113/econgeo.109.5.1179.

Stevens, C.H., Poole, F.G., and Amaya-Martínez, R., 2014, Late Paleozoic fusulinids from Sonora, México: Importance for interpretation of depositional settings, biogeography, and paleotectonics: Revista Mexicana de Ciencias Geológicas, 31 (1) p. 14-27. Available at http://satori.geociencias.unam.mx/31-1/%2802%2931-1-Stevens.pdf PDF file, 2507 KB].

Barringer, J.L., Reilly, P.A., Eberl, D.D., Mumford, A.C., Benzel, W.M., Szabo, Zoltan, Shourds, J.L., and Young, L.Y., 2013, Arsenic in New Jersey Coastal Plain streams, sediments, and shallow groundwater: Effects from different geologic sources and anthropogenic inputs on biogeochemical and physical mobilization processes: U.S. Geological Survey Scientific Investigations Report 2013–5107, 37 p., http://dx.doi.org/10.3133/sir20135107.

Goldschmidt 2014 Participation

Several USGS scientists are presenting their geochemical research at the Geochemical Society's Goldschmidt 2014 conference, June 8-13, 2014, in Sacramento, California. The USGS is convening or presenting at several sessions, including a session "From Smelly Mud to Toxic Trace Elements: The Sulfur Cycle and its Impacts on Human and Environmental Health (A Tribute to Marty Goldhaber)." Conference information can be found at: http://goldschmidt.info/2014/index.

Continental Dynamics Workshop Particpation

USGS geologist Mike Cosca is in Turkey during late May attending a scientific workshop supported by the National Science Foundation Continental Dynamics program. Mike is part of a 5-year project involving research scientists and students from 5 countries investigating possible links between mantle dynamics, seismicity, faulting, volcanism, neotectonics, and climate change.

New Publications - May 2014

Rimondi, V., Bardelli, F., Benvenuti, M., Costagliola, P., Gray, J.E., and Lattanzi, P., 2014, Mercury speciation in the Mt. Amiata mining district (Italy): Interplay between urban activities and mercury contamination: Chemical Geology, v. 380, 25 July 2014, p. 110-118, http://dx.doi.org/10.1016/j.chemgeo.2014.04.023.

Smith, D.B., Cannon, W.F., Woodruff, L.G., Solano, Federico, and Ellefsen, K.J., 2014, Geochemical and mineralogical maps for soils of the conterminous United States: U.S. Geological Survey Open-File Report 2014–1082, 386 p., http://dx.doi.org/10.3133/ofr20141082.

National Soil Maps Publication and Briefings

USGS scientist Dave Smith and the Mineral Resources Program conducted briefings for Ann Castle, Assistant Secretary for Water and Science on May 19, 2014; the Senate Committee on Energy and Natural Resources on May 21, 2014; and the House Committee on Natural Resources about the newly published geochemical and mineralogical maps for conterminous U.S. soils. They also conducted an on-line presentation on May 20, 2014, for interested members of the American Association of State Geologists (AASG) about the newly published geochemical and mineralogical maps for conterminous U.S. soils. This was also featured as a USGS Science Feature top story "Getting the Dirt on Soil" (http://www.usgs.gov/blogs/features/usgs_top_story/getting-the-dirt-on-soil/). GISUser.com mentioned the publication on their website (http://www.gisuser.com/content/view/33051/2/). The briefings coincided with the publication of U.S. Geological Survey Open-File Report 2014–1082, Geochemical and mineralogical maps for soils of the conterminous United States, http://dx.doi.org/10.3133/ofr20141082.

USGS Scientist Re-elected as Vice-Chair – UN Expert Group on Resource Classification

USGS scientist Brad Van Gosen was recently re-elected to a two-year term as a Vice-Chair of the Bureau of the United Nations Economic Commission for Europe (UNECE) Expert Group on Resource Classification at their annual conference held in Geneva April 28-May 2. The Bureau oversees and advises efforts of the Expert Group, which is developing and refining a unified, international classification system for reporting fossil energy and mineral resources—UNFC-2009 (http://www.unece.org/hk/energy/se/unfc_gen.html).

GSA North Central Section Meeting Participation

USGS geologist Philip Verplanck chaired a session on carbonatite and alkali magmatism and presented research on critical mineral resources at the Geological Society of America North Central Section Meeting in Lincoln, Nebraska, April 24-25. Information about the meeting and the talks presented can be found at: http://www.geosociety.org/Sections/nc/2014mtg/.

USGS Minerals Research Highlighted at PACROFI XII Meeting

USGS minerals research will be highlighted at the Pan American Current Research on Fluid Inclusions (PACROFI XII), June 2-5 at the USGS Denver offices and Pingree Park in Colorado. USGS scientist Al Hofstra is a co-organizer of the meeting. USGS scientist Poul Emsbo provided a keynote lecture "Origin and evolution of ore-forming brines in sedimentary basins: Perspectives from MVT, sedex, and sedimentary Cu deposits". Meeting activities include a tour of the USGS Denver Inclusion Analysis Laboratories in Denver. Information about the meeting is at http://warnercnr.colostate.edu/geo-news-and-events/pacrofi-2014

USGS Scientist Appointed as Australian Research Council Assessor

USGS scientist Rich Goldfarb has been nominated and has accepted an appointment as an Assessor for the Australian Research Council, a government organization that oversees Australia's National Competitive Grants Program. Rich will help evaluate research proposals submitted to the grants program on topics of mineral resources. Australian Research Council information can be found at http://www.arc.gov.au/.

New Publications - April 2014

Cosca, M.A., Thompson, R.A., Lee, J.P., Turner, K.J., Neymark, L.A., and Premo, W.R., 2014, 40Ar/39Ar geochronology, isotope geochemistry (Sr, Nd, Pb), and petrology of alkaline lavas near Yampa, Colorado: Migration of alkaline volcanism and evolution of the northern Rio Grande rift: Geosphere, 10 (2), p. 374-400, http://dx.doi.org/10.1130/GES00921.1.

Giles, S.A., and Eppinger, R.G., 2014, A geochemical perspective of Red Mountain—An unmined volcanogenic massive sulfide deposit in the Alaska Range: U.S. Geological Survey Open-File Report 2014–1037, 1 plate, http://dx.doi.org/10.3133/ofr20141037.

Shawe, D.R., Snee, L.W., Byers, F.M., Jr., and du Bray, E.A., 2014, Geochronology and correlation of Tertiary volcanic and intrusive rocks in part of the southern Toquima Range, Nye County, Nevada: U.S. Geological Survey Scientific Investigations Report 2013–5206, 105 p., 1 plate, http://dx.doi.org/10.3133/sir20135206.

Invited Keynote Presentation at GACMAC 2014

USGS scientist Rich Goldfarb will be giving the invited keynote talk in the symposium "Gold in 2014: A Holistic Approach" at the Joint Annual Meeting of the Geological Association of Canada and Mineralogical Association of Canada in Fredericton, New Brunswick on May 21-23. The symposium's purpose is to examine current understanding of all gold deposit types from several perspectives. Rich's talk will be entitled: "Orogenic gold: Regional perspectives and space-time correlations". Information about the meeting is at http://www.unb.ca/conferences/gacmac2014/index-english.html.

USGS Geologist Serves as U.S. Delegate to UN Expert Group

Brad Van Gosen will serve as the U.S. delegate for the 5th Session of the Expert Group on Resource Classification, April 28 to May 2, 2014, at the Palais des Nations in Geneva, Switzerland. The working group represents more than 50 countries, which together have developed and continue to refine a standardized, international system for classifying resources—the United Nations Framework Classification for Fossil Energy and Mineral Reserves and Resources (UNFC-2009). The UNFC is the only modern classification system to address the minerals, petroleum and uranium sectors using a single set of definitions and terminology, designed to pave the way for international communication of resources. Its application is now being broadened to encompass renewable energy resources. Information about the UNFC-2009 is at http://www.unece.org/energy/se/reserves.html, and Expert Group meeting information is at http://www.unece.org/index.php?id=33065.

AP Article About USGS Soil Geochemical Landscapes Project

Scott Smith's Associated Press article National soil collection may unlock mysteries, research possibilities,'almost limitless,' about USGS scientist David B. Smith's national soil geochemical landscapes project which was also published in the Washington Post on April 6, 2014. http://www.washingtonpost.com/national/health-science/national-soil-collection-may-unlock-mysteries/2014/04/06/c5cdc188-b75d-11e3-8cc3-d4bf596577eb_story.html

U.S. News & Report Article on USGS Soil Geochemical Landscapes Project

USGS scientist David B. Smith's national soil geochemical landscapes project was mentioned in the following article: U.S. News & World Report, March 29, 2014, "National soil collection may unlock mysteries, research possibilities, 'almost limitless.'" http://www.usnews.com/news/science/news/articles/2014/03/29/national-soil-collection-may-unlock-mysteries

Laboratory Equipment March 2014 Issue Features USGS Work

Patrick Nadoll (lead author, collaborator with USGS co-author Jeffrey Mauk), had a news item, “Database Simplifies Mineral Targeting,” in the March 2014 issue of Laboratory Equipment (http://www.laboratoryequipment.com/news/2014/03/database-simplifies-mineral-targeting) pertaining to their recently published Ore Geology Reviews article, “The chemistry of hydrothermal magnetite: A review,” (http://dx.doi.org/10.1016/j.oregeorev.2013.12.013).

New Publications - March 2014

Virta, Robert, and Van Gosen, Brad, 2014, Mineral resource of the month—Wollastonite: Earth, 59(4), (April 2014), p. 51. http://www.earthmagazine.org/

Tull, J., Holm-Denoma, C.S., and Barineau, C.I., in press, Early to Middle Ordovician back-arc basin in the southern Appalachian Blue Ridge: Characteristics, extent, and tectonic significance: Geological Society of America Bulletin, first published on March 20, 2014, http://dx.doi.org/10.1130/B30967.1.

Verplanck, P.L., Van Gosen, B.S., Seal, R.R, and McCafferty, A.E., 2014, A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits: U.S. Geological Survey Scientific Investigations Report 2010–5070–J, 58 p., http://dx.doi.org/10.3133/sir20105070J.

Goldfarb, R.J., and Santosh, M., 2014, The dilemma of the Jiaodong gold deposits: Are they unique?: Geoscience Frontiers, 5 (2), p. 139-153, http://dx.doi.org/10.1016/j.gsf.2013.11.001.

Goldfarb Receives 2013 Best Paper Award

Richard Goldfarb received the Colorado Scientific Society's Past Presidents' Best Paper Award 2013, for his October 2013 presentation, "Plate Tectonics and Metallogeny of Gold Deposits," for the Society (http://www.coloscisoc.org/news/2013/Oct2013_CSSNewsv2.pdf). [PDF file, 2.1 MB]

Keynote Presentation at North Atlantic Craton Conference

Richard Goldfarb will be the keynote speaker at the North Atlantic Craton Conference at the University of Saint Andrews, Scotland, March 19-21; "Targeting Orogenic Gold: What are the Keys for Exploration?" is the presentation title. Conference information is at http://www.nac-conference2014.org.uk/.

Participation in Upcoming American Mineralogist Centennial Volume in 2015-2016

Celeste Mercer is serving as an Associate Editor for a Special Section of the American Mineralogist's upcoming Centennial Volume. The theme for the Special Section is, "From Magmas to Ore Deposits", which will be published in 2015-2016. http://ammin.geoscienceworld.org/site/misc/specialissuelist.xhtml.

New Publications - February 2014

Neymark, Leonid, 2014, Uranium–Lead Dating, Opal, in Rink, W.J., and Thompson, J., eds., Encyclopedia of Scientific Dating Methods: Springer Netherlands, p. 1-9, doi: 10.1007/978-94-007-6326-5_263-1.

Nadoll, P., Angerer, T., Mauk, J.L., French, D., and Walshe, J., 2014, The chemistry of hydrothermal magnetite: A review: Ore Geology Reviews, 61, September 2014, p. 1-32, http://dx.doi.org/10.1016/j.oregeorev.2013.12.013.

Cosca, M.A., Thompson, R.A., Lee, J.P., Turner, K.J., Neymark, L.A., and Premo, W.R., 2014, 40Ar/39Ar geochronology, isotope geochemistry (Sr, Nd, Pb), and petrology of alkaline lavas near Yampa, Colorado: Migration of alkaline volcanism and evolution of the northern Rio Grande rift: Geosphere, 10 (2), p. 374-400, http://dx.doi.org/10.1130/GES00921.1.

Drexler, J.Z., Paces, J.B., Alpers, C.N., Windham-Myers, L., Neymark, L.A., Bullen, T.D., and Taylor, H.E., 2014, 234U/238U and ?87Sr in peat as tracers of paleosalinity in the Sacramento-San Joaquin Delta of California, USA: Applied Geochemistry 40, p. 164-179, http://dx.doi.org/10.1016/j.apgeochem.2013.10.011.

Neymark, L.A., Premo, W.R., Mel'nikov, N.N., and Emsbo, P., 2014, Precise determination of δ88Sr in rocks, minerals, and waters by double-spike TIMS: A powerful tool in the study of geological, hydrological and biological processes: Journal of Analytical Atomic Spectrometry, 29, p. 65-75, http://dx.doi.org/10.1039/C3JA50310K.

Paces, J.B., Nichols, P.J., Neymark, L.A., and Rajaram, H., 2013, Evaluation of Pleistocene groundwater flow through fractured tuffs using a U-series disequilibrium approach, Pahute Mesa, Nevada, USA: Chemical Geology, 358, p. 101-118, http://dx.doi.org/10.1016/j.chemgeo.2013.08.043.

du Bray, E.A., John, D.A., and Cousens, B.L., 2014, Petrologic, tectonic, and metallogenic evolution of the southern segment of the ancestral Cascades magmatic arc, California and Nevada: Geosphere, 10(1), p. 1-39, first published online December 2013, http://dx.doi.org/10.1130/GES00944.1.

Invited Talk at Colorado School of Mines

Brad Van Gosen will give an invited luncheon talk to the Colorado School of Mines, Student Chapter of the Society of Economic Geologists (SEG) on February 26. The talk is "Heavy-mineral sands as sources of rare earth elements: Monazite in the southeastern United States".

Sedimentary Rock Dating Presentation

John Aleinikoff will be the February 18th speaker at USGS Rocky Mountain Science Seminar, presenting his talk "How to date sedimentary rocks."

Invited Geochronology Talk at University of Cincinnati

John Aleinikoff gave an invited talk at the University of Cincinnati on January 31, titled "Determining the age of deposition of sedimentary rocks: ion microprobe U-Pb geochronology and REE analysis of diagenetic xenotime and monazite".

New York Times Interviews USGS Scientists About Asbestos Research

The New York Times interviewed USGS scientists Brad Van Gosen and Geoff Plumlee for an article, "Landscapes Tainted by Asbestos", published January 17, 2013. Both Plumlee and Van Gosen were quoted in the article regarding their previous USGS research on asbestos. http://nyti.ms/1eQgS3X

Presentation on Pebble Deposit, Alaska

On January 15, 2014, Karen Kelley presented a talk to the Society of Economic Geologists (SEG) student chapter at the Colorado School of Mines titled "Exploration geochemical studies at the Pebble porphyry Cu-Au-Mo deposit, Alaska".

New Publications - January 2014

Cosca M.A.: Structural Fabrics (K-Ar/Ar-Ar). In: Rink W., Thompson J. (Ed.) Earth Sciences Series. Encyclopedia of Scientific Dating Methods: SpringerReference (www.springerreference.com). Springer-Verlag Berlin Heidelberg, 2013. doi: 10.1007/978-94-007-6326-5_124-1.

Driscoll, R.L., Hageman, P.L., Benzel, W.M., Diehl, S.F., Morman, Suzette, Choate, L.M., and Lowers, Heather, 2014, Assessment of the geoavailability of trace elements from selected zinc minerals: U.S. Geological Survey Open-File Report 2013–1309, 78 p., http://dx.doi.org/10.3133/ofr20131309.

Gray, J.E., Rimondi, V., Costagliola, P., Vaselli, O., and Lattanzi, P., 2014, Long-distance transport of Hg, Sb, and As from a mined area, conversion of Hg to methyl-Hg, and uptake of Hg by fish on the Tiber River basin, west-central Italy: Environmental Geochemistry and Health, 36 (1), p. 145-157, http://dx.doi.org/10.1007/s10653-013-9525-z.

Saunders, J.A., Hofstra, A.H., Goldfarb, R.J., and Reed, M.H., 2014, 13.15 - Geochemistry of Hydrothermal Gold Deposits, in Reference Module in Earth Systems and Environmental Sciences, from Treatise of Geochemistry (Second Edition), Holland, H., and Turekian, K., editors, Oxford, p. 383-424, http://dx.doi.org/10.1016/B978-0-08-095975-7.01117-7.

Pribil, M.J., Maddaloni, M.A., Staiger, K., Wilson, E., Magriples, N., Mustafa, A., and Santella, D., 2014, Investigation of off-site airborne transport of lead from a superfund removal action site using lead isotope ratios and concentrations: Applied Geochemistry, 41, p. 89-94, http://dx.doi.org/10.1016/j.apgeochem.2013.11.004. [In collaboration with EPA Region II]

USGS Scientist Elected as Mineralogical Society of America Fellow

Michael (Mike) Cosca was recently elected Fellow of the Mineralogical Society of America for significant contributions to the fields of mineralogy, petrology, and crystallography. Information about the Mineralogical Society of America Fellows can be found at http://www.minsocam.org/MSA/Awards/Fellowship.html.

Top

2013

New Publication - December 2013

Shanks, W.C. Pat, III, 2014 (available online 2013), 13.3 – Stable Isotope Geochemistry of Mineral Deposits: Reference Module in Earth Systems and Environmental Sciences, from Treatise on Geochemistry (Second Edition), Editors-in-Chief: Heinrich Holland and Karl Turekian, Oxford, 2014, p. 59-85, http://dx.doi.org/10.1016/B978-0-08-095975-7.01103-7.

Participation at 46th American Geophysical Union (AGU) Annual Fall Meeting

Several USGS scientists are participating in the 46th American Geophysical Union (AGU) Annual Fall Meeting, December 7-13, San Francisco, CA. In addition to USGS geophysicist Carol Finn’s participation as AGU’s President, several USGS scientists are presenting USGS research with oral presentations, posters, and co-convening sessions at the AGU annual fall meeting including the following:

  • Andrew Manning, presentation, Helium isotope data from the Goldfield epithermal system, Nevada: Evidence for volatile input from a primitive mantle source during ore formation,
  • Celestine Mercer, poster, To homogenize, or not to homogenize, that is the question: Quartz-hosted melt inclusion analysis avenues.

Recent Presentations at the 26th International Applied Geochemistry symposium in Rotorua New Zealand on November 18-21, 2013

  • Robert Eppinger, presentation, Exploration geochemical studies at the concealed Pebble porphyry Cu-Au-Mo deposit, Alaska, part I. Active soil gases determine with GORE modules.
  • Karen Kelley, presentation, Exploration for porphyry deposits in glaciated environments: a case study from the Iliamna/Audn region, southwest Alaska, with comparisons to the Pebble district.
  • Rich Goldfarb, presentation, Spatial and temporal distribution of orogenic gold.
  • Geoff Plumlee, presentation, Environmental and medical geochemistry in urban disaster scenarios.
  • Jeffrey Mauk, presentation, Geochemical mapping of Alaska. Geoff Plumlee, presentation, Medical geology and geochemistry insights into the global potential for lead poisoning linked to artisanal or recreational metal mining.

Participation at 26th International Applied Geochemistry Symposium

USGS scientists from the Mineral Resources Program are chairing technical sessions and presenting their mineral resources and medical geochemical research at the 26th International Applied Geochemistry Symposium (IAGS) in Roturua, New Zealand, November 18-21. Geoff Plumlee and Larry Meinert are presenting keynote presentations on medical geochemistry at urban disaster scenarios and geology, geochemistry, terroir and wine, respectively. Robert Eppinger is the President of the Association of Applied Geochemists, the main organization coordinating the IAGS. For information on the Symposium, see http://www.gns.cri.nz/iags/.

New Publication - November 2013

Gray, J.E., Pribil, M.J., and Higueras, P.L., 2013, Mercury isotope fractionation during ore retorting in the Almadén mining district, Spain: Chemical Geology, 357, p. 150-157, http://dx.doi.org/10.1016/j.chemgeo.2013.08.036.

Invited Lectures at Universities

Mike Cosca recently presented two invited lectures to the geoscience departments at the University of Northern Arizona and Washington State University. Cosca presented research results that demonstrate how late Cenozoic magmatism in northern Colorado has migrated toward the Colorado Plateau since the late Miocene and how this relates to regional tectonics, mineral resource potential, and the evolution of the northern Rio Grande rift.

USGS Scientist Interviewed by Research Colorado Magazine

Alan Koenig was interviewed on November 18 by a reporter for Research Colorado Magazine regarding the rapid screening of rock powders for rare metals work that is being conducted in the USGS laser ablation – inductively coupled plasma – mass spectrometry (LA-ICP-MS) facility. This will run a story in the next few months. Information about the project can be found at http://minerals.cr.usgs.gov/projects/assess_method_critical_metals/.

Diversity Award

Ian Ridley, Science Center Director/Acting Director of the Central Minerals and Environmental Resources and the Crustal Geophysics and Geochemistry Science Centers, respectively, received a USGS Diversity Award for his efforts in promoting youth and veterans' employment in the USGS Southwest Region.

Presentation at Alaska Miners Association 2013

Garth Graham and Bruce Smith gave presentations in the technical session at the Alaska Miners Association annual meeting on November 6 in Anchorage, AK. Garth's presentation was "Overview of latest Cretaceous gold deposits of southwestern Alaska" and Bruce presented "New Products from Airborne Electromagnetic and Magnetic Surveys of Selected Areas in Alaska".

Hofstra, A.H., Todorov, T.I., Mercer, C.N., Adams, D.T., and Marsh, E.E., 2013, Silicate melt inclusion evidence for extreme pre-eruptive enrichment and post-eruptive depletion of lithium in silicic volcanic rocks of the western United States—Implications for the origin of lithium-rich brines: Economic Geology, v. 108, p. 1691-1701, http://dx.doi.org/10.2113/econgeo.108.7.1691.

New Publications - October 2013

Smith, D.B., Cannon, W.F., Woodruff, L.G., Solano, Federico, Kilburn, J.E., and Fey, D.L., 2013, Geochemical and mineralogical data for soils of the conterminous United States: U.S. Geological Survey Data Series 801, 19 p., http://pubs.usgs.gov/ds/801/.

USGS Scientist Shanks Elected as GSA Fellow

USGS Scientist Wayne (Pat) Shanks was elected as a Geological Society of America (GSA) Fellow and will be recognized on October 28 during the 2013 Annual Meeting in Denver, CO. Pat was nominated in recognition for "outstanding and innovative career contributions and leadership in the study of stable isotopes, economic ore deposits, and hydrothermal systems during his 35-year career in academia and the U.S. Geological Survey."

Participation at the Geological Society of America 2013 Annual Meeting

Scientists from the Central Mineral and Environmental Resources Science Center are teaching courses, leading field trips, convening sessions, and presenting papers and posters at the Geological Society of America 2013 Annual Meeting. Sessions being convened focus on biogeochemical processes affecting metals and metal isotopes, recent advancements in groundwater in an era of climate change and resource development, Rio Grande Rift insights, geochemical mapping at regional to continental scales, brittle fault and fault rocks structure and evolution, geophysics and remote sensing for characterization of rare earth elements and other critical minerals, interdisciplinary studies across critical zones, geoheritage, REE-enriched carbonatite-alkalic rock systems, and rare earth element research.

Assistance to Afghan Geological Survey

Ian Ridley returned from Kabul, Afghanistan where he was part of a USGS team to evaluate the analytical capabilities of the Afghan Geological Survey.

Publication: Mineralogic Insights on Porphyry Cu-Mo Stockwork Formation

Mercer, C.N., and Reed, M.H., 2013, Porphyry Cu-Mo Stockwork Formation by Dynamic, Transient Hydrothermal Pulses: Mineralogic Insights from the Deposit at Butte, Montana: Economic Geology, 108 (6), p. 1347-1377. http://dx.doi.org/10.2113/econgeo.108.6.1347

Participation in Society of Economic Geologist 2013 Annual Meeting

Several USGS scientists are presenting their mineral resources research at the 2014 Society of Economic Geologists (SEG) Meeting, September 24-27, in Whistler, BC, Canada. The Society's meeting has participants from industry, academia, and government, and provides an opportunity for the exchange of information regarding mineral deposits and mineral resources research. USGS presentations and posters covered a range of topics including the formation of mineral deposits in domestic and internal study sites, including research results on the Pebble porphyry copper deposit in Alaska. .

Assistance to Afghan Geological Survey

Ian Ridley returned from Kabul, Afghanistan where he was part of a USGS team to evaluate the analytical capabilities of the Afghan Geological Survey.

Publication: Isotopic Geochemistry of Rocks and Fracture Minerals

Neymark, L.A., Peterman, Z.E., Moscati, R.J., and Thivierge, R.H., 2013, U-Pb, Rb-Sr, and U-series isotope geochemistry of rocks and fracture minerals from the Chalk River Laboratories site, Grenville Province, Ontario, Canada: Applied Geochemistry, Volume 36 (September 2013), p. 10-33. http://dx.doi.org/10.1016/j.apgeochem.2013.06.004

Participation at Thormium Resources Meeting

Brad Van Gosen will participate in a "Technical Meeting on Thorium Resources and Provinces", hosted by the International Atomic Energy Agency, September 24-27, 2013, in Vienna, Austria. The meeting will bring together 40 experts from 30 countries. At the conference, Brad will chair a session of speakers who will describe thorium resources and provinces across the globe. Brad will speak on heavy-mineral sands as a source of thorium and rare earth elements in the southeastern U.S.

Participation in International Mine Water Association's 2013 Annual Meeting

USGS scientists participated in the International Mine Water Association's 2013 annual meeting, "Reliable Mine Water Technology" held in Golden, Colorado from August 6-9, 2013. Doug Yager was co-leader of a post-conference trip "Mines, Mountains, and Hot Springs" that highlighted western-southwestern Colorado's geologic diversity and the USGS and Animas River Stakeholder's work in the Silverton area. Attendees included experts in mine reclamation and mine water technology from Spain, Germany, Poland, South Africa, United Kingdom, Australia, Canada, and the United States.

USGS Shale Research Presented at Conference

Karen Kelley presented a talk at the 12th Biennial meeting for SGA (Society for geology applied to mineral deposits) meeting in Uppsala, Sweden from August 12-15, 2013. The title of her presentation is "Preliminary mineralogy and geochemistry of metal-rich (Mo-Ni-V-Zn) oil shale of the Carboniferous Heath Formation, Montana, USA.

USGS X-ray Fluorescence Research Presented at Conference

William Benzel co-chaired a technical session, "Applications for Portable XRF" and presented a paper, "The Role of Handheld XRF in Delineating the Extent and Degree of Lead Contamination in Soils Associated with Artisanal Gold Mining, Northwestern Nigeria," at the Denver X-ray Conference, the 62nd Annual Conference on Applications of X-ray Analysis, August 5-9, 2013, in Westminster, Colorado.

Research on Fossial Diatoms Featured on NPS Website

Mary Ellen Benson's PhD research on the fossil diatoms of the Florissant Formation in Colorado has been featured on the National Park Service's website: http://www.nps.gov/flfo/naturescience/diatoms-of-the-florissant-formation.htm.

Collaborative Fieldwork and Research with China University of Geosciences

USGS scientist Ryan Taylor was recently invited by the China University of Geosciences, Beijing to conduct joint fieldwork, collaborate on new research publications, and advise graduate students on proper fieldwork practices and analytical techniques for studying ore deposits. A week and a half of fieldwork focused on characterizing various early Mesozoic porphyry Cu-Mo deposits in the West Qinling Orogenic Belt and fitting their genesis into the tectonic evolution of central China. Days at the university in Beijing were spent discussing various aspects of mineral deposit models with current or prospective graduate students, and discussing data with professors for a collaborative project.

USGS National Map of Surficial Mineralogy Online

Exposed surface mineral group maps of the western U.S. derived from spectral analysis of Landsat 7 and ASTER satellite remote sensing data are available online for interactive viewing. The GIS-ready image maps, as well as AVIRIS- and HyMap-derived mineral and vegetation maps, were developed as cost-effective tools for regional mapping and mineralogical characterization of exposed hydrothermally altered rocks and mine waste. The maps can be viewed at the Central and Environmental Resources Science Center Web Mapping Services site at http://cmerwebmap.cr.usgs.gov/.

Associated Press Interview - Strategic and Critical Minerals

(CMER) Alan Koenig was interviewed by the Associated Press for an article on strategic and critical minerals that ran on July 21, 2013 - "Gold rush-era discards dould fuel cellphones, TVs". The articale was subsequently picked up by several media outlets including national and local newspapers. A similar article made the Top Page of the USGS public website. The story was also featured as a USGS Science Feature Top Story: "Mine Tailings and Forgotten Rocks Key to New Technology?".

Publication: Mercury Transport and Dispersion in Italy

USGS scientist John Gray published an article in the May 2013 issue of Environmental Geochemistry and Health, "Long-distance transport of Hg, Sb, and As from a mined area, conversion of Hg to methyl-Hg, and uptake of Hg by fish on the Tiber River basin, west-central Italy." The research, conducted with Italian academic collaborators, collected stream sediment, stream water, and fish from a broad region to evaluate downstream transport and dispersion of mercury (Hg) from inactive mines in the Monte Amiata Hg District, Tuscany, Italy. The abstract can be viewed at doi: 10.1007/s10653-013-9525-z.

CMERSC Web Mapping Services Site

The Central Mineral and Environmental Resources Science Center Web Mapping Services (CMERWEBMAP) site will serve as a public portal to online map services and web applications displaying CMERSC geospatial science results. New technologies for web-based dissemination of geospatial data are leveraged to provide the public with interactive, customized, easy viewing access to regional- and national-scale geological map products in conjunction with basemaps of geographical data such as imagery, hydrology, transportation, and administrative boundaries. Products will include geologic maps, maps of surface minerals and vegetation derived from spectral analysis of remote sensing data, and maps produced from other geophysical data. CMERWEBMAP is available at http://cmerwebmap.cr.usgs.gov/.

Geologic Occurrences of Erionite in the U.S.

USGS scientist Bradley Van Gosen published an article in the August 2013 issue of Environmental Geochemistry and Health, "Geologic occurrences of erionite in the United States: an emerging national public health concern for respiratory disease." The collaborative effort with the U.S. Forest Service, updates and expands the erionite occurrences database, provided in a supplemental file (US_erionite.xls). Epidemiology, public health, and natural hazard studies can incorporate this information on known erionite occurrences and their characteristics. By recognizing that only specific geologic settings and formations are hosts to erionite, this knowledge can be used in developing management plans designed to protect the public.

Colorado Mineral Belt Map from Remote Sensing Data

USGS Scientific Investigations Map 3256: Comparative Mineral Mapping in the Colorado Mineral Belt using AVIRIS and ASTER Remote Sensing Data is now available. The report presents results of interpretation of spectral remote sensing data covering the eastern Colorado Mineral Belt in central Colorado, USA, acquired by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) sensors. This study was part of a multidisciplinary mapping and data integration project at the U.S. Geological Survey that focused on long-term resource planning by land-managing entities in Colorado. This publication is available at http://pubs.usgs.gov/sim/3256/.

Guest Lecture on Freshwater Diatomites

Mary Ellen Benson is an invited guest lecturer at the Freshwater Diatomite Clinic at Iowa Lakeside Laboratory, sponsored by the University of Iowa, from June 17-21, 2013. She presented a geologic overview of Cenozoic freshwater diatomites of western North America.

Outreach to United Nations

USGS scientist Bradley Van Gosen was requested by the United Nations Economic Commission for Europe (UNECE) to provide an "Expert Opinion" on unified energy and mineral resources reporting for the UNECE website (www.unece.org). The "Expert Opinion" feature, "Why 'unified' reporting of the world's energy and mineral resources is important", is posted on the UNECE web site homepage. Van Gosen serves as a United States delegate and Vice Chair for the UNECE Expert Group on Resource Classification. He is the United States member of a collaborative uranium-thorium working group of the International Atomic Energy Agency (IAEA). The feature can be found at http://www.unece.org/index.php?id=32966.

Alaska Geochemical Database Updated

USGS Data Series 759: Alaska Geochemical Database Version 2.0 (AGDB2)—Including "Best Value" Data Compilations for Rock, Sediment, Soil, Mineral, and Concentrate Sample Media, is now available, and is the first database of its kind in the United States. The database contains all USGS geochemical data for more than 264,000 samples collected between 1962 and 2009 from the State of Alaska. Each sample has one "best value" determination for each analyzed species, greatly improving speed and efficiency of use for this ArcGIS-friendly database. The publication is available at http://pubs.usgs.gov/ds/759/.

Minerals and Vegetation Map from Landsat Imagery

USGS Scientific Investigations Map 3252: Automated Mapping of Mineral Groups and Green Vegetation from Landsat Thematic Mapper Imagery with an Example from the San Juan Mountains, Colorado is now available. Multispectral satellite data acquired by the ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) and Landsat 7 Enhanced Thematic Mapper Plus (TM) sensors are being used to populate an online Geographic Information System (GIS) of the spatial occurrence of mineral groups and green vegetation across the western conterminous United States and Alaska. These geospatial data are supporting U.S. Geological Survey national-scale mineral deposit database development and other mineral resource and geoenvironmental research as a means of characterizing mineral exposures related to mined and unmined hydrothermally altered rocks and mine waste. The publication is available at http://pubs.usgs.gov/sim/3252/.

USGS Contributes to Economic Geology volume on Pebble Copper-Gold Deposit in southwestern Alaska

Twelve USGS scientists have co-authored a series of articles that are featured in Economic Geology's May issue, a special edition dedicated to the Pebble Deposit in southwestern Alaska, one of the largest copper-gold deposits in the world; it also contains significant amounts of molybdenum, silver, palladium, and rhenium. Working in concert with academia and the company exploring at Pebble, the team conducted studies over a 5-year period to examine the geology, geochemistry, and geophysical signature of the deposit and its surrounding terrain. As a result, they were able to determine how these types of deposits are formed and how best to look for them elsewhere. This is significant because the Pebble deposit is almost entirely obscured by overlying rocks and sediments, and it is thought likely that additional buried deposits exist in the region. The deposit model and exploration tools devised and tested by the USGS offer invaluable techniques for assessing these concealed mineral resources here and elsewhere, both in the United States and around the globe.

USGS-authored papers include a description of the deposit, where and how it was formed, an analysis of its aeromagnetic fingerprint, how the geochemical signature of the deposit can be used to explore for other concealed deposits, and whether certain elemental variations at the surface indicate mineralization at depth. This issue of Economic Geology can be found on-line at http://econgeol.geoscienceworld.org/content/108/3.toc.

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