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Alteration and mineralization in the eastern part of the Soldier Mountains, Camas County, Idaho

Bulletin 2064-V
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https://doi.org/10.3133/b2064V

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Abstract

The eastern part of the Soldier Mountains in Camas County, south-central Idaho, is underlain principally by plutonic rocks of Cretaceous and Eocene age that locally have undergone propylitic, potassic, and muscovite-quartz alteration. Muscovite- quartz alteration is Cretaceous in age and is localized along joints and fractures, some of which are filled with quartz. Associated veins have yielded minor amounts of gold. Potassic alteration is probably both Cretaceous and Eocene in age but is weakly developed and limited in extent. Propylitic alteration is Eocene in age and is pronounced around biotite granite plutons. Despite a clear association between plutons of biotite granite and widespread propylitic alteration, mineralization associated with these rocks was minimal. Mineralized areas within more mafic Eocene plutons are characterized by veins and (or) stockworks(?) enriched in copper, molybdenum, and silver, but these areas are restricted in size and have not been productive.
Publication type Report
Publication Subtype USGS Numbered Series
Title Alteration and mineralization in the eastern part of the Soldier Mountains, Camas County, Idaho
Series title Bulletin
Series number 2064
Chapter V
DOI 10.3133/b2064V
Edition Version 1.0
Year Published 2001
Language ENGLISH
Publisher U.S. Dept. of the Interior, U.S. Geological Survey,
Description 13 p.
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