U.S. Geological Survey Geochemical Reference Materials and Certificates
U.S. Geological Survey
Certificate of Analysis
SDO-1 is a reference sample which can be used to establish analytical accuracy in the analysis of organic- and sulfur-rich sedimentary rocks. The sample is relatively radioactive, giving counts two four times background over 0-225 feet. It was collected from the Huron Member of the Ohio Shale near Morehead, Kentucky.
Concentrations were determined by cooperating laboratories using a variety of analytical methods. If the results from 5 or more laboratories and 3 or more independent methods are in statistical agreement, concentrations are recommended. Less well-established concentrations are given as averages or ranges (Kane and others, 1990). Concentrations listed are for as-received material.
Recommended Values | Information Values | Range | Certificate Information
Glossary | Order and Pricing Information | Back to Certificate List
| Oxide | Wt% | s.d. | Oxide | Wt% | s.d. | |
|---|---|---|---|---|---|---|
| Al2O3 | 12.27 | 0.23 | MnO | 0.042 | 0.005 | |
| CaO | 1.05 | 0.047 | Na2O | 0.38 | 0.026 | |
| Fe2O3 tot | 9.34 | 0.21 | P2O5 | 0.11 | 0.007 | |
| K2O | 3.35 | 0.061 | SiO2 | 49.28 | 0.63 | |
| MgO | 1.54 | 0.038 | TiO2 | 0.71 | 0.031 |
| Element | mg/kg | s.d. | Element | mg/kg | s.d. | |
|---|---|---|---|---|---|---|
| As | 68.5 | 8.6 | Ni | 99.5 | 9.9 | |
| Ba | 397 | 38 | Pr | 8.9 | 0.66 | |
| Ce | 79.3 | 7.8 | Rb | 126 | 3.9 | |
| Co | 46.8 | 6.3 | Sc | 13.2 | 1.5 | |
| Cr | 66.4 | 7.6 | Sm | 7.7 | 0.81 | |
| Dy | 6.0 | 0.65 | Sr | 75.1 | 11.0 | |
| Eu | 1.6 | 0.22 | U | 48.8 | 6.5 | |
| Ga | 16.8 | 1.8 | V | 160 | 21 | |
| La | 38.5 | 4.4 | Y | 40.6 | 6.5 | |
| Mo | 134 | 21 | Yb | 3.4 | 0.46 | |
| Nb | 11.4 | 1.2 | Zn | 64.1 | 6.9 | |
| Nd | 36.6 | 3.3 | Zr | 165 | 24 |
| Item | Wt % | s.d. | Item | Wt % | s.d. | |
|---|---|---|---|---|---|---|
| Co2 | 1.01 | 0.21 | Htot | 1.34 | 0.06 | |
| Ctot | 9.95 | 0.44 | Ntot | 0.347 | 0.043 | |
| Corgcalc | 9.68 | 0.45 | Stot | 5.35 | 0.44 | |
| Corgmeasured | (8.98 - 10.4 range) | LOI | 21.7 | 0.0 | ||
| H2O | 1.21 | 0.50 | ||||
| Element | mg/kg | s.d. | Element | mg/kg | s.d. | |
|---|---|---|---|---|---|---|
| B | 128 | 11 | Ho | 1.2 | 0.11 | |
| Be | 3.3 | 0.57 | Li | 28.6 | 5.5 | |
| Cs | 6.9 | 1.2 | Lu | 0.54 | 0.14 | |
| Cu | 60.2 | 9.6 | Pb | 27.9 | 5.2 | |
| Er | 3.6 | 0.55 | Sn | 3.7 | 1.2 | |
| F | 697 | 88.5 | Ta | 1.1 | 0.13 | |
| Gd | 7.4 | 1.9 | Tb | 1.2 | 0.24 | |
| Hf | 4.7 | 0.75 | Th | 10.5 | 0.55 | |
| Hg | 0.19 | 0.08 | Tm | 0.45 | 0.08 |
| Element | mg/kg | Element | mg/kg | |
|---|---|---|---|---|
| Ag | 0.094 - 0.17 | Ge | 1.3 | |
| Au | 0.002 - 0.0035 | In | <0.2 | |
| Bi | 2 - <10 | Sb | 4.1 - 4.8 | |
| Br | 5 | Se | 1.9 - 6.8 | |
| Cd | <2 - <10 | W | 3.3 |
Reston, Virginia
August 1991
David B. Smith
Central Region Mineral Resources Team (formerly Branch of Geochemistry)
| Symbol | Definition |
|---|---|
| Fe2O3T | Total iron concentration expressed as Fe2O3 |
| Ctot | Total carbon concentration |
| Cinorgmeasured | Inorganic carbon concentration |
| Corgcalc | Total organic carbon calculated (Ctot - Cinorg) |
| Stot | Total sulfur concentration |
| LOI | Loss on ignition |
| H2O | Moisture |
| Wt% | Total element concentration expressed as weight percent |
| mg/kg | Total element concentration expressed as milligrams of element per kilogram of solid sample |
| ± | One standard deviation |
| s.d. | One standard deviation |
This geochemical reference standard is no longer available.
Back to Certificate List | Mineral Resources Program | Central Region Mineral Resources Team
| Mineral Resources | Eastern / Central / Western / Alaska / Minerals Information |
| Crustal Imaging & Characterization / Spatial Data |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://minerals.cr.usgs.gov/geo_chem_stand/ohioshale.html
Page Contact Information: CMRT Webmaster
Page Last Modified: 07-May-2008@15:37
