Magmatism, metamorphism and deformation at Hemlo, Ontario and the timing of Au-Mo mineralization in the Golden Giant mine

R. J. Kuhns, F. J. Sawkins, E. Ito

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The Golden Giant mine is developed in the Archean Hemlo gold-molybdenum deposit hosted within the Hemlo-Heron Bay greenstone belt in NW Ontario, Canada. The ore occurs in steeply dipping tabular zones within metasedimentary rocks and within quartz-eye muscovite schists in association with microcline-mica-pyrite alteration, and a variety of other minerals. It is proposed that the primary Au-Mo mineralization occurred before the M1 metamorphic event, possibly related to emplacement of the Golden Giant quartz porphyry in a premineralization structural zone. The mineralization was modified by the M1 event, and severely deformed during mylonitization. Dikes from the Cedar Creek stock intruded the deposit sequence and overprinted the M1 event with an M2 metamorphism. -from Authors

Original languageEnglish (US)
Pages (from-to)720-756
Number of pages37
JournalEconomic Geology
Volume89
Issue number4
DOIs
StatePublished - Jan 1 1994

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