Geological Characteristics and Ore Prospecting Potential of Taiyangshan Copper-Molybdenum Deposit in Gansu

Taiyangshan copper-molybdenum deposit,tectonically located in the west of Caledonian fold belt in the northern Qinling area,is a volcanic ~ subvolcanic hydrothermal fluid type deposit. The mineralization is related to Yanshanian continental facies volcanic eruption and subvolcanic hydrothermal activities. The ore-bearing lithological series are andesiticdacitic lava and the corresponding tuffs,with minor copper mineralization in the subvolcanics. The ore bodies take the shapes of lensing and veins,the structures mainly being veinlet-dissemination ones with minor brecciated structures etc.The ore types are copper ore,copper-molybdenum ore,molybdenum ore,molybdenum-cobalt ore etc. The main wall rock alterations are silisification,sericitization,and pyritization. The mineralizations were mainly hosted in the volcanics and subvolcanics of a Jurassic basin and in the bottom of the basin.