Stanley L. Korzeb, 2019, Interpretations of new and previous lead isotopic data for Late Cretaceous to Eocene satellite intrusions, Butte granite, volcanic rocks, and base metal veins of the Boulder Batholith, southwestern Montana: Montana Bureau of Mines and Geology Bulletin 139, 40 p.
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New lead isotope data and published data used to determine relationships between mineral resources and magmatic events, identify a magma source for the intrusions and volcanic rocks, and a metal source for the base metal veins. Base metal vein metals were sourced from intrusions that assimilated upper crustal material. Intrusions originated from Archean-Proterozoic mafic to intermediate basement that assimilated upper crust.
LEAD ISOTOPES, BASE METAL VEINS, BOULDER BATHOLITH, SUBDUCTION ZONE, RADIOGENIC
BROADWATER, DEER LODGE, JEFFERSON, LEWIS AND CLARK, POWELL
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