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Full-Text Articles in Geological Engineering
Mineralogy, Fluid Inclusion, And Stable Isotope Studies Of The Hog Heaven Mining District, Flathead County, Montana, Ian Kallio
Graduate Theses & Non-Theses
The Hog Heaven mining district in northwestern Montana is unique in that it is a high-sulfidation epithermal system containing high Ag-Pb-Zn relative to Au-Cu, with a very high Ag to Au ratio (2,330:1). The deposits are hosted within the Cenozoic Hog Heaven volcanic field (HHVF), a 30 to 36 Ma suite that consists predominantly of rhyodacite flow-dome complexes and pyroclastic rocks. The HHVF is underlain by shallow-dipping siliclastic sediments of the Mesoproterozoic Belt Supergroup. These sediments are known to host important SEDEX (e.g., Sullivan) and red-bed copper (e.g., Spar Lake, Rock Creek, Montanore) deposits rich in Ag-Pb-Zn-Cu-Ba. The HHVF erupted …