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Open-File Report 2010–1077

Geochemical and Stable Isotopic Data on Barren and Mineralized Drill Core in the Devonian Popovich Formation, Screamer Sector of the Betze-Post Gold Deposit, Northern Carlin Trend, Nevada

By William D. Christiansen,1 Albert H. Hofstra,1 Pamela B. Zohar,2 and Gilles Tousignant2

1U.S. Geological Survey, MS-973, Box 25046, Denver, CO 80225
2Barrick Goldstrike Mines Inc., Elko, NV 89801

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Abstract

Selected drill core intervals of barren and mineralized Popovich Formation from the Screamer ore zone of the Betze-Post gold deposit on the Carlin trend in Nevada were analyzed for geochemical and stable isotopic composition. A total of 332, five-foot core samples from five exploration holes were analyzed for gold, sulfur, carbonate, carbonaceous material, forty major, minor, and trace elements, antimony, barium, tellurium, sulfide sulfur isotopes and selected samples for carbonate carbon and oxygen isotopes. Drill-hole coordinates and collar elevations, sample depth intervals, stratigraphic units, and geochemical and stable isotopic compositions, are presented in tables. Gold ranged from less than 0.001 ounce per ton in barren intervals to over 0.6 ounce per ton in ore-grade intervals of Popovich rocks. Sulfide sulfur isotopic compositions (δ34S) ranged from less than -16.0 to 16.0 per mil relative to Vienna Cañon Diablo Troilite (VCDT). Carbonate carbon isotopic compositions (δ13C) ranged from -2.0 to 2.0 per mil relative to Vienna Pee Dee Belemnite (VPDB). Carbonate oxygen isotopic compositions (δ18O) ranged from 8.6 to 26.8 per mil relative to Vienna Standard Mean Ocean Water (VSMOW).

First posted May 20, 2011

For additional information contact:

USGS Central Mineral and Environmental Resources Science Center
Box 25046, MS-973
Denver Federal Center
Denver, CO 80225

http://minerals.cr.usgs.gov/

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Suggested citation:

Christiansen, William N., Hofstra, Albert H., Zohar, Pamela B., and Tousignant, Gilles, 2011, Geochemical and stable isotopic data on barren and mineralized drill core in the Devonian Popovich Formation, Screamer sector of the Betze-Post gold deposit, northern Carlin trend, Nevada: U.S. Geological Survey Open-File Report 2010–1077, 11 p.



Contents

Introduction

Methods

Results

Acknowledgments

References

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