Evidence for Proterozoic and late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene district, Idaho and Montana
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Abstract
New 40 Ar/ 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.
Suggested Citation
Leach, D.L., Hofstra, A., Church, S.E., Snee, L., Vaughn, R.B., Zartman, R., 1998, Evidence for Proterozoic and late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene district, Idaho and Montana: Economic Geology, v. 93, no. 3, p. 347-359, https://doi.org/10.2113/gsecongeo.93.3.347.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evidence for Proterozoic and late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene district, Idaho and Montana |
| Series title | Economic Geology |
| DOI | 10.2113/gsecongeo.93.3.347 |
| Volume | 93 |
| Issue | 3 |
| Publication Date | May 01, 1998 |
| Year Published | 1998 |
| Language | English |
| Publisher | Society of Economic Geologists |
| Description | 13 p. |
| First page | 347 |
| Last page | 359 |