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Possible extension of mineral belts, northern part of Coeur d'Alene district, Idaho

Journal of Research of the U.S. Geological Survey

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Abstract

The ore deposits in the northern part of the Coeur d'Alene district are located within rocks of the Belt Supergroup that have been intruded by Cretaceous quartz monzonites. Lead-zinc-silver replacement veins constitute most of the deposits. The geometry of the district has been modified by post-ore faulting along the Osburn, Dobson Pass, and other faults. The original position of the Gem stocks, before their separation from the Diego Peak stocks by the Dobson Pass fault, can be approximately reconstructed by moving the truncated stocks and associated geochemical dispersion patterns back into matching positions. The known mineral belts are defined by dispersion patterns of both lead and the Pb:Zn ratio. Similar dispersion patterns of lead and the Pb:Zn ration northwest of the original position of the Gem stocks suggest that the mineral belts extend into that area.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Possible extension of mineral belts, northern part of Coeur d'Alene district, Idaho
Series title:
Journal of Research of the U.S. Geological Survey
Volume
3
Issue:
1
Year Published:
1975
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Mineral Resources Program
Description:
7 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Research of the U.S. Geological Survey
First page:
1
Last page:
7
Country:
United States
State:
Idaho