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Geology Of Precambrian Rocks In The Poorman Anticlinorium And Homestake Mine, Black Hills, South Dakota

By
Rogers Hiram
Rogers Hiram
Geology Department, Homestake Mine P. 0. Box 875 Lead, SD 57754
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Published:
January 01, 1990

Abstract

Previous work on Precambrian rocks from the Lead window (Noble and Harder, 1948) concentrated on the stratigraphy and structure of rocks exposed along the Lead Anticlinorium and at the Homestake gold mine. This paper focuses on lithologies, geochemistry, and paleoenvironments of mostly unmineralized metasediments exposed in the Poorman anticlinorium.

Approximately 3,600 meters of complexly folded Precambrian metamorphic rocks form the Lead window of the Black Hills uplift (Noble and Harder, 1948). A lithologic map and cross section from the Homestake mine are given in Figures 1 and 2. A large body of amphibolite, the Yates Member of the Poorman Formation, forms the base of the Precambrian sequence. Campbell (pers. commun., 1989) interprets these rocks as part of a basaltic volcanic pile.

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Contents

Society of Economic Geologists Guidebook Series

Metallogeny of Gold in the Black Hills, South Dakota

Colin J. Paterson
Colin J. Paterson
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Alvis L. Lisenbee
Alvis L. Lisenbee
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Tommy B. Thompson
Tommy B. Thompson
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Society of Economic Geologists
Volume
7
ISBN electronic:
9781934969601
Publication date:
January 01, 1990

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