Source requirements for the Golden Mile, Kalgoorlie: significance to the metamorphic replacement model for Archean gold deposits
作者： G. Neil Phillips , David I. Groves , Isobel J. Brown
DOI: 10.1139/E87-158
关键词: Metamorphic rock 、 Sill 、 Source rock 、 Geology 、 Metamorphic facies 、 Greenstone belt 、 Geochemistry 、 Archean 、 Shear zone 、 Pyrite
摘要: The Golden Mile at Kalgoorlie represents a giant Archean hydrothermal gold system localized by ductile shear zones and hosted mainly differentiated tholeiitic sill. Chlorite, carbonate, pyrite alteration cover the whole mineralized area (1 km × 3 km), calculations suggest that for (production around 1200 t Au), amounts of components added to these are 340 Mt CO2, 20 Mt K, 5 Mt S. If one adopts metamorphic-replacement model mineralization in which all ore derive from devolatilization greenstones amphibolite facies or above, data source involving 5 km thick greenstone slab 8 km × 8 km could produce necessary S, H2O, Au. This is considered reasonable volume belt, under such minimum spacing large deposits would be approximately 20 km along strike.Neither special Au-enriched rocks nor unreasonably volumes b...
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