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.
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.
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, 13 p.
|±||One standard deviation|
Unless otherwise indicated, total element concentrations are reported for material on an as-received basis, i.e., no drying.
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.
Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964D
Denver, CO 80225
FAX: 303-236-3200 or 303-236-1425
Domestic customers: Payment options include purchase order, check, money order, or credit card (Visa, Mastercard, American Express).
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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 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.