Geology and Mineralization Styles of the George Fisher Zn-Pb-Ag Deposit, Mount Isa, Australia

摘要

The George Fisher deposit contains one of the world’s largest in situ Zn resources (108 Mt at 93 g/t Ag, 5.4% Pb, and 11.1% Zn). It is situated 25 km north of Mount Isa and is hosted by the ~1655 Ma Urquhart Shale in the Western fold belt of the Mount Isa inlier. George Fisher is Zn rich compared to Mount Isa and Hilton and is distinguished by a paucity of syn- to late-tectonic Cu mineralization and associated silica-dolomite alteration.