Skip to Main Content
Book Chapter

Newly Discovered Devonian Sedex-type Base and Precious Metal Mineralization, Northern Carlin Trend, Nevada

By
Poul Emsbo
Poul Emsbo
Colorado School of MinesGolden, CO;
Search for other works by this author on:
Richard W. Hutchinson
Richard W. Hutchinson
Colorado School of MinesGolden, CO;
Search for other works by this author on:
Albert H. Hofstra
Albert H. Hofstra
U. S. Geological SurveyDenver, CO
Search for other works by this author on:
Jeffrey A. Volk
Jeffrey A. Volk
Barrick Goldstrike Mines Inc.Elko, NV
Search for other works by this author on:
Keith H. Bettles
Keith H. Bettles
Barrick Goldstrike Mines Inc.Elko, NV
Search for other works by this author on:
Gary J. Baschuk
Gary J. Baschuk
Barrick Goldstrike Mines Inc.Elko, NV
Search for other works by this author on:
Terry M. Collins
Terry M. Collins
Barrick Goldstrike Mines Inc.Elko, NV
Search for other works by this author on:
Eric A. Lauha
Eric A. Lauha
Barrick Goldstrike Mines Inc.Elko, NV
Search for other works by this author on:
Jeffrey L. Borhauer
Jeffrey L. Borhauer
Barrick Goldstrike Mines Inc.Elko, NV
Search for other works by this author on:
Published:
January 01, 1997

Abstract

This report presents evidence for a previously unrecognized type of Au mineralization on the Barrick Goldstrike property that is geochemically, mineralogically, and temporally distinct from classic Carlin-type mineralization (Table 1). This newly recognized mineralization is characterized by a mineral assemblage that includes barite, sphalerite, minor boulangerite, pyrite, galena, minor tetrahedrite, tennantite, chalcopyrite and native gold. Gold occurs as native inclusions in pyrite, chalcopyrite, tetrahedrite, bitumen, dolomite, and barite. In contrast, features recognized in Carlin-type deposits include a mineral asemblage of As-rich pyrite, realgar, orpiment, and arsenopyrite, with a distinct absence of base metal sulfides. Gold occurs as sub-micron inclusions in As-rich pyrite and alteration consists of decalcification, silicification, and argillization. Carlin-type mineralization is younger than a 39 Ma dike (Emsbo et al., 1996).

Recognition of the base metal mineralization resulted from a broad study of the breccia-hosted Carlin-type deposit in the Meikle Mine. Examination of the stratigraphic section adjacent to Meikle revealed that these base metal sulfides and barite are stratiform and occur in unaltered rocks of the Popovich Formation. In Meikle, the base metal-rich assemblage also occurs as discordant veins which were brecciated and cut by Carlin-type mineralization (Lamb, 1995). The association of low but significant gold content with this base metal mineralization outside Meikle prompted a study of its geological and spatial characteristics, its age and significance within the geologic evolution of the Goldstrike property, and the relationship of its gold to its other sulfides.

In this abstract we describes textural, stratigraphic/spatial, and geochemical evidence that this base

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

Society of Economic Geologists Guidebook Series

Carlin-Type Gold Deposits Field Conference

Peter Vikre
Peter Vikre
Search for other works by this author on:
Tommy B. Thompson
Tommy B. Thompson
Search for other works by this author on:
Keith Bettles
Keith Bettles
Search for other works by this author on:
Odin Christensen
Odin Christensen
Search for other works by this author on:
Ron Parratt
Ron Parratt
Search for other works by this author on:
Society of Economic Geologists
Volume
28
ISBN electronic:
9781934969816
Publication date:
January 01, 1997

GeoRef

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now