2004•Journal of Mineralogy and PetrologyRequires access
PRIMARY DISCUSSION ON ORE-FORMING EFFECT OFEMEI IGNEOUS PROVINCE
WU De-chao
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Abstract
Activity of Emei mantle plume is the most obvious tectonic and magma-heat event in the southwest edge of Yangtzi platform. Emei igneous province is also a large ore-forming province and plays an important role in the ore formation of that area. Besides forming the famous magma-hydrothermal ore deposit of Fe-Ti-V (PGE) and other pro-mantle elements,it also causes violent interaction of crust and mantle, forming extremely hot stream field in a large area, accelerating the formation, circulation and evolution of crust ore-forming fluid, and forming the hydrothermal-hydrothermal reforming ore deposits of Au, Ag, Zn, Hg, Te, Sb, Se etc.in the southwest edge of Yangtzi platform and neighboring area. Since different rock phrases have different ore-forming attributes and different tectonic backgrounds have different influence on the formation, evolution, geologic and geochemical characteristics, and ore formation of basalt in different rock areas, ore formation displays obvious zonation characteristics on the whole.