U.S. Geological Survey Geochemical Reference Materials and Certificates
U.S. Geological Survey
Certificate of Analysis
DGPM-1 is a disseminated gold ore reference material which can be used to establish analytical accuracy for the analysis of gold in geologic samples. Material for the standard was collected from the Pinson Mine, which is located 40 miles northeast of Winnemucca, Nevada. Gold in the reference material is present as particles less than 0.5 micron in size and associated with pyrite and iron oxides.
Element or oxide concentrations are recommended if results from three or more independent laboratories using two or more independent analytical procedures are in statistical agreement.
Values are based on results from a minimum of two cooperating laboratories using the same or similar analytical procedures.
Recommended Values | Information Values | Certificate Information | Bibliography | Glossary | Notes | Order and Pricing Information
| Element | µg/g | ± | Oxide | Wt % | ± | |
|---|---|---|---|---|---|---|
| Sb | 14 | 1 | Al2O3 | 9.56 | 0.19 | |
| As | 180 | 10 | Fe2O3 | 1.92 | 0.06 | |
| Au | 0.730 | 0.060 | K2O | 2.74 | 0.02 | |
| SiO2 | 79.82 | 0.54 | ||||
| Element | µg/g | ± | Element | Wt % | ± | |
|---|---|---|---|---|---|---|
| W | 76 | 10 | CaO | 0.22 | 0.04 | |
| MgO | 0.56 | 0.05 | ||||
Denver, Colorado
April 3, 1995
Dr. Geoff Plumlee
U.S. Geological Survey
Central Region Mineral Resources Team
Grimes, D.J., Stewart, K.C., Wilson, S.A., and Kretschmer, E.L., 1996, The characterization of USGS Gold Reference Standard, DGPM-1, U.S. Geological Survey Open-File Report 96-058, p. 13.
| Symbol | Definition |
|---|---|
| ± | One standard deviation |
Unless otherwise indicated, total element concentrations are reported for material on an as-received basis, i.e., no drying.
USGS reference materials (RMs) may be obtained directly from Dr. Stephen A. Wilson. The price for each bottle of RM is $80.00 (U.S. dollars) except DGPM-1, which is $175.00 (U.S. dollars). For domestic orders, this cost includes all shipping and handling charges using normal mail delivery. For foreign orders, delivery charges will be added to the final bill. Urgent requests for RMs should be initiated by Fax or e-mail. If required, overnight delivery is available with these charges added to the final bill.
Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964
Denver, CO 80225
Tel: 303-236-2454
FAX: 303-236-3200 or 303-236-1425
e-mail: (swilson)
Domestic customers: Payment options include purchase order, check, money order, or credit card (Visa, Mastercard).
International customers: Payment on foreign orders can only be made using the following:
Payments for domestic or international orders using a credit card receive a 10% discount on the per bottle price.
Beginning in 2006, users of USGS geochemical reference standards must complete a user agreement form prior to the order being purchased.
User agreement for domestic users: Word format, 56 KB and PDF format, 24 KB.
User agreement for foreign users: Word format, 56 KB and PDF format, 28 KB.
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/gold.html
Page Contact Information: CRMRSC Webmaster
Questions about the reference standards - Contact Steve Wilson
Page Last Modified: 12-Mar-2009@20:54
