U.S. Geological Survey Certificate of Analysis

Disseminated Gold Ore, DGPM-1

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.

Recommended values

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

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Information Values

Element µg/g ± Element Wt % ±
W 76 10 CaO 0.22 0.04
MgO 0.56 0.05

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Certificate Information

Denver, Colorado
April 3, 1995

Dr. Geoff Plumlee
U.S. Geological Survey
Central Region Mineral Resources Team

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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, 13 p.

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Symbol Definition
± One standard deviation

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Unless otherwise indicated, total element concentrations are reported for material on an as-received basis, i.e., no drying.

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Order and Pricing Information

Placing an Order

USGS reference materials may be obtained directly from Dr. Stephen A. Wilson. The price for each reference material is listed in U.S. dollars and are subject to change. For domestic orders, this cost includes all shipping and handling charges using normal mail delivery by the U.S. Postal Service. For foreign orders, delivery charges will be added to the final bill. Urgent requests for reference materials should be initiated by Fax or e-mail. If required, expedited delivery is available with any additional shipping charges added to the final bill.

To order a USGS Reference Material, please contact Dr. Stephen Wilson or use the downloadable form: Order Form (Word) (22 KB) or Order Form (PDF) (238 KB).

Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964D
Denver, CO 80225
Tel: 303-236-2454
FAX: 303-236-3200 or 303-236-1425
Email: (swilson@usgs.gov)

Payment Options

Domestic customers: Payment options include purchase order, check, money order, or credit card (Visa, Mastercard, American Express).

International customers: Payment on foreign orders can only be made using the following:

  • Banker's draft against an international bank
  • International money order
  • Credit card (Visa, Mastercard, American Express)

Payments for domestic or international orders using a credit card receive a 10% discount on the per bottle price.

User Agreements

Beginning in 2006, users of USGS geochemical reference materials must complete a user agreement form prior to the order being processed. This agreement is required by the USGS Technology Transfer Office for complying with the United States Economy Act, 31 USC 1535A.

Please download the agreement form and follow the instructions on the form when placing your order.

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