Evidence for Proterozoic and late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene district, Idaho and Montana
January 1, 1998
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.
Citation Information
| Publication Year | 1998 |
|---|---|
| Title | Evidence for Proterozoic and late Cretaceous-early Tertiary ore-forming events in the Coeur d'Alene district, Idaho and Montana |
| DOI | 10.2113/gsecongeo.93.3.347 |
| Authors | D. L. Leach, A. H. Hofstra, S. E. Church, L. W. Snee, R. B. Vaughn, R. E. Zartman |
| Publication Type | Article |
| Publication Subtype | Journal Article |
| Series Title | Economic Geology |
| Index ID | 70021398 |
| Record Source | USGS Publications Warehouse |