A remote sensing analysis of deep genesis of geotectonics and shallow ore-forming characteristics in the Beishan Mountain

Abstract：The view that geotectonics was controlled by deep dynamic action of the earth has long been accepted, because the compression between Tarim Plate, Sino-Korea Plate and Mongolia Plate resulted in the formation of the Beishan orogenic belt, which has been evidenced by a comprehensive analysis of regional tectonics in Beishan Mountain and its adjacent areas. The closure of Beishan paleo-ocean resulting from the northward migration of the Tarim Plate seems to have been the main reason. Furthermore, the subduction of the Tarim Plate into the Beishan orogenic belt caused the northward dipping of thrust faults in this area. These activities had much to do with the mineralization in shallow places. The authors analyzed the distribution of ore deposits in Beishan area and found that many large ore deposits occur on the northern side of the acid batholith and are closely associated with northward dipping thrust faults and stocks. The acid batholith related to mineralization also has northward dipping characteristics, and hence the ore-forming magma could be emplaced on the northern side of the batholith. These ore-forming features provide important means and clues to the prospecting work in similar areas.