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Abstract
The long-standing ore-genesis model for world-class deposits of the Butte mining district, Montana, is of deep pre-Main Stage porphyry Cu-Mo and overlying Main Stage Ag-Zn-Cu-zoned lode veinsformed from discrete hydrothermal systems related to rhyolite dikes. The lode-specific model describes metals zones that formed in the lode veins as hydrothermal processes diminished in intensity (changing temperature and chemical characteristics) outward from the district center. New geologic and multi-method geochronologic studies pro- vide new timing constraints on the lode veins and reevaluation of geologic relations (Lund and others, 2018), leading to a new model for formation of the lode veins and their relations to stockwork Cu-Mo deposits and igneous events.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Two-event genesis of Butte lode veins: Geologic and geochronologic evidence from ore veins, dikes, and host plutons |
| Year Published | 2021 |
| Language | English |
| Publisher | Montana Bureau of Mines and Geology |
| Contributing office(s) | Central Mineral and Environmental Resources Science Center, Eastern Mineral and Environmental Resources Science Center, Geology, Geophysics, and Geochemistry Science Center |
| Description | 3 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | Proceedings of the Montana Mining and Mineral Symposium 2019 |
| First page | 71 |
| Last page | 73 |
| Conference Title | Montana Mining and Mineral Symposium 2019 |
| Conference Date | October 9-11, 2019 |
| Country | United States |
| State | Montana |
| Other Geospatial | Butte mining district |
| Google Analytic Metrics | Metrics page |