Mineralogy and mineral chemistry of the ABM replacement-style volcanogenic massive sulfide deposit, Finlayson Lake district, Yukon, Canada.

ABSTRACT: The ABM deposit is a bimodal-felsic, replacement-style volcanogenic massive sulfide deposit (VMS) that is hosted by back-arc affinity rocks of the Yukon-Tanana terrane in the Finlayson Lake VMS district, Yukon, Canada. Massive sulfide zones occur as stacked and stratabound lenses subparallel to the volcanic stratigraphy, surrounded by pervasive white mica and/or chlorite alteration. Remnant clasts of volcanic rocks and preserved bedding occur locally within the massive sulfide lenses and indicate that mineralization formed through subseafloor replacement of pre-existing strata. Three mineral assemblages occur at the ABM deposit: (1) a pyrite-chalcopyrite-magnetite-pyrrhotite assemblage that is associated with Cu-Bi-Se-Co-enrichment and occurs at the center of the massive sulfide lenses; (2

SUBMITTER: Denisova N 

PROVIDER: S-EPMC10861405 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature