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GEOREF RECORD
Evidence for Proterozoic and Late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene District, Idaho and Montana
D. L. Leach, A. H. Hofstra, S. E. Church, L. W. Snee, R. B. Vaughn and R. E. Zartman
Evidence for Proterozoic and Late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene District, Idaho and Montana
Economic Geology and the Bulletin of the Society of Economic Geologists (May 1998) 93 (3): 347-359
Evidence for Proterozoic and Late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene District, Idaho and Montana
Economic Geology and the Bulletin of the Society of Economic Geologists (May 1998) 93 (3): 347-359
Index Terms/Descriptors
- absolute age
- alkaline earth metals
- antimony ores
- Ar/Ar
- Belt Basin
- Belt Supergroup
- bournonite
- Bunker Hill Mine
- carbonates
- Cenozoic
- Coeur d'Alene mining district
- Cretaceous
- dates
- galena
- Idaho
- isotope ratios
- isotopes
- K/Ar
- lead ores
- lower Tertiary
- Mesoproterozoic
- Mesozoic
- metal ores
- metals
- mica group
- mineral deposits, genesis
- mines
- Montana
- muscovite
- North America
- Pb/Pb
- Precambrian
- Proterozoic
- quartz veins
- sericite
- sheet silicates
- Shoshone County Idaho
- siderite
- silicates
- silver ores
- Sr-87/Sr-86
- stable isotopes
- stibnite
- strontium
- sulfantimonites
- sulfides
- sulfosalts
- Tertiary
- tetrahedrite
- United States
- Upper Cretaceous
- upper Precambrian
- veins
- zinc ores
- Sunshine Mine
- Lucky Friday Mine
- Star Morning Mine
- Baychief Mine
- Murry Subdistrict
- U. S. Antimony Mine
Latitude & Longitude
Abstract
New (super 40) Ar/ (super 39) Ar age spectra on sericite and lead isotope data on tetrahedrite, siderite, galena, bournonite, and stibnite, together with previously published isotopic, geochemical, and geologic studies provide evidence for two major vein-forming events in the Coeur d'Alene district and surrounding areas of the Belt basin. The data suggest that the zinc- and lead-rich veins (e.g., Bunker Hill and Star-Morning mines) formed in the Proterozoic (1.0 Ga), whereas the silver-rich veins (e.g., Silver belt mines), antimony veins (e.g., U.S. Antimony mine), and gold-bearing quartz veins (Murry subdistrict) formed in Late Cretaceous to early Tetitary time.
ISSN: 0361-0128
EISSN: 1554-0774
Coden: ECGLAL
Serial Title: Economic Geology and the Bulletin of the Society of Economic Geologists
Serial Volume: 93
Serial Issue: 3
Title: Evidence for Proterozoic and Late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene District, Idaho and Montana
Affiliation: U. S. Geological Survey,
Denver, CO,
United States
Pages: 347-359
Published: 199805
Text Language: English
Publisher: Economic Geology Publishing Company,
Lancaster, PA,
United States
References: 58
Accession Number: 1998-065841
Categories: Economic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendix
Illustration Description: illus. incl. 3 tables, sketch maps
N47°00'00" - N48°00'00", W117°00'00" - W115°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Society of Economic Geologists
Update Code: 199823
Program Name: USGSOPNon-USGS publications with USGS authors
