U.S. Geological Survey Geochemical Reference Materials and Certificates
U.S. Geological Survey
Certificate of Analysis
DTS-1 is a reference material which can be used to establish analytical accuracy in the analysis of ultramafic rocks composed primarily of the mineral olivine. Material for the standard was collected from the Twin Sisters area of Washington state (Flanagan, 1967, 1972).
Element concentrations were determined by cooperating laboratories using a variety of analytical methods. Certificate values are based primarily on international data compilations (Abbey, 1983, Gladney, et al., 1987, Govindaraju, 1994). USGS reports (Flanagan, 1967, 1972) provide background information on this material.
Recommended Values | Certificate Information | Bibliography | Glossary | Notes
| Oxide | Wt % | ± | Oxide | Wt % | ± | |
|---|---|---|---|---|---|---|
| SiO2 | 40.41 | 0.47 | abbr title="Manganese">MnO | 0.12 | 0.01 | |
| Fe2O3 | 1.03 | 0.36 | MgO | 49.59 | 0.33 | |
| FeO | 6.97 | 0.26 | CaO | 0.17 | 0.03 | |
| Fe2O3T | 8.68 | 0.24 | ||||
| Element | µg/g | ± | Element | µg/g | ± | |
|---|---|---|---|---|---|---|
| Ctot | 220 | 80 | Ni | 2360 | 170 | |
| Ce | 0.07 | 0.02 | Sc | 3.5 | 0.3 | |
| Co | 140 | 15 | Th | 0.01 | 0.001 | |
| Cr | 3990 | 300 | U | 0.0036 | 0.0004 | |
| Li | 2.1 | 0.12 | ||||
| Oxide | Wt % | Oxide | Wt % | |
|---|---|---|---|---|
| Al2O3 | 0.19 | Na2O | 0.01 | |
| K2O | 0.001 | P2O5 | 0.002 | |
| TiO2 | 0.005 | |||
| Element | µg/g | Element | µg/g | |
|---|---|---|---|---|
| As | 0.034 | Stot | 12 | |
| Ba | 1.7 | Sb | 0.5 | |
| Cd | 0.01 | Sn | 0.55 | |
| Cl | 11 | Sr | 0.32 | |
| Cu | 7.1 | V | 11 | |
| F | 13 | Zn | 46 | |
| Pb | 12 | |||
Denver, Colorado
revised March 1995
David B. Smith
Central Region Mineral Resources Team (formerly Branch of Geochemistry)
Abbey, S., 1983, Studies in "Standard Samples" of Silicate Rocks and Minerals 1969-1982, Canadian Geological Survey paper 83-15, p. 114.
Flanagan, F.J., 1967, U.S. Geological Survey silicate rock standards, Geochimica et Cosmoshimica Acta, 31: 289-308.
Flanagan, F.J., 1972 values for international geochemical reference samples, Geochimica et Cosmochimica Acta, 37:1189-1200.
Gladney, E.S., Jones, E.A., Nickell, E.J. and Roelandts, I., 1991, 1988 Compilation of elemental concentration data for USGS DTS-1, G-1, PCC-1, and W-1, Geostandards Newsletter, vol., 15 pp. 199-396.
Govindaraju, K., 1994, 1994 Compilation of Working Values and Descriptions for 383 Geostandards, Geostandards Newsletter, 18:1-158.
Ragland, P.C., Rogers, J.J.W., and Justus, P.S., 1068, Origin and diffferentiation of Triassic dolerite magmas, North Carolina, USA: Contributions to Mineralogy and Petrology, vol. 20, no. 1, pp. 57-80.
| Symbol | Definition |
|---|---|
| Fe2O3T | Total iron expressed as Fe2O3 |
| Ctot | Total carbon concentration |
| Stot | Total sulfur concentration |
| Wt% | Percent of total element concentration |
| µg/g | Total element concentration expressed as micrograms of element per gram of solid sample |
| ± | One standard deviation |
Unless otherwise indicated, total element concentrations are reported for material on an as-received basis.
This geochemical reference standard is no longer available.
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