Volcanic Rocks Around The Shiyingtan Gold Mine, Shanshan And The Relationship To The Gold Mineralization

Shiyingtan locates at shanshan of XinJiang Uygur Autonomous regions and the confluence between Kanggultage deep fault and Yamansu deep fault.Though the analysis in the characteristics of major elements, REE geochemistry, trace element characteristics, Sr isotope on the characteristics of the Late Paleozoic volcanic rocks of gold mining areas of shiyintan, the study area that Permian Afghanistan under the EC phase of its land kebulake for peraluminous acidic volcanic rocks quality of high-K calc-alkaline to calc-alkaline series of volcanic rocks, which may come from the upper mantle magma through the volcanic continental margins rose to basement fault continental crust, After mixing the material dyed crust and the formation of crust-mantle mixed with the characteristics of tolerance.In the Shiyingtan gold mine, the measurement yields the range of mineralization temperature 108.4 -190.5℃, salinity 19.24% -9.18%, mineralization pressure 10-35MPa, mineralization depth 300-1000m; ore-forming fluids with magmatic water mixed with meteoric water characteristics, and atmospheric precipitation., The Shiyintan gold deposit is a typical adularia-sericite epithermal gold deposit and Its formation mechanism is metal-rich elements (Au, Ag) of the magmatic hydrothermal, regional deep fault along the side of the secondary faults increased, due to precipitation of a large number of accession, the physical and chemical conditions of rapid change, generate the majority of gold minerals, quartz, adularia, fluorite, such as chalcedony and has generated minerals, mineral along the fissure filling, forming body gold. The late tectonic - magmatic activity resulted in superposition Shiyingtan gold deposits.