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Geological Features and the Metallogenic Model of W-Cu polymetallic Deposit at Jiangligou in Tongren County,Qinghai Province

LI Huan1,2,XI Xiao-Shuang1,2,WU Cheng-ming1,2,ZHENG Yu1,2,QING De-cheng1(1.Institute of Geology,Central South University,Changsha 410083;2.Key Laboratory of Metallogenic Prediction of Nonferrous Metals,Ministry of Education,Changsha 410083)  
The Jiangligou multi-metal deposit lies in the western part of the West Qinling Mountains,which was an island arc zone formed by the subduction of The South Ocean during Triassic time.The mining area consists of the main mining areas and several small mineralization points.The strata exposed are mainly the Longwuhe Group of Lower Triassic and Daguanshan Group of Lower Permian.Multi-metal mineralization is related to a multi-phase composite granite pluton emplacement,which lies in the south of the mining area.The main ore-forming elements in the main mining area are W and Cu,which are skarn-type mineralization,distributed in the country rock northwest of the granite pluton emplacement.At the same time,fissure mineralization,quartz vein-type mineralization and disseminated mineralization are all found in the pluton emplacement.The main mining area has the typical mineralization characteristics of zonation,which manifested in zonation of ore-forming elements,ore alteration and metallotectonic.Accordingly,a composite metallogenic model has been established for this deposit.
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