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SHRIMP U-Pb ages of Xenotime and monazite from the Spar Lake red bed-associated Cu-Ag deposit, western Montana: Implications for ore genesis

Aleinikoff, John N.; Hayes, Timothy S.; Evans, Karl; Mazdab, Frank K.; Pillers, Renee M.; Fanning, Christopher


Xenotime occurs as epitaxial overgrowths on detrital zircons in the Mesoproterozoic Revett Formation (Belt Supergroup) at the Spar Lake red bed-associated Cu-Ag deposit, western Montana. The deposit formed during diagenesis of Revett strata, where oxidizing metal-bearing hydrothermal fluids encountered a reducing zone. Samples for geochronology were collected from several mineral zones. Xenotime overgrowths (1-30 μm wide) were found in polished thin sections from five ore and near-ore zones...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Economic Geology; Bulletin of the Society of Economic Geologists
DOI: 10.2113/econgeo.107.6.1251


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