Regional Geological Background And Metallogenic Regularity Of The Jiangligou Polymetallic Ore Deposit In Tongren, Qinghai

The Jiangligou deposit is located in north of Tongren county of Qinghai province.Due to its remote location, the research degree is not high, more detailed geology research and the prosoecting work are needed.On this paper, based on a number of literature reading, combined with the complete fileld geological investigation and the research work, the writer mainly discusses the regional geological background of ore deposit formations and studies the conditions of ore deposit formations, summarizes metallogentic regularity of ore deposit and discusses ore genesis primarily.The writer studies the tectonic evolution of Xiqinling and analyzes tectonic mineralization zoning and regional geological mineralization characteristics of Huangnan region, and proposes that the regional geological background of Xiqinling is island arc belt formed from the south ocean subduction.The west of Xiqinling mainly is Triassic expansion basin,corresponding to Kunlun ocean subduction.The splicing of East Kunlun geoid and orogenetic movements which is formed by Tethys ocean subduction.The two periods are all metallogenic periods of Huangnan region and Jiangligou deposit is formed during extrusion periods.The writer discusses the conditions of ore deposit formations from three parts,magmatic activity is the basic condition, stratum is the subsidiary condition, and structure is the essential condition.According to the ore deposits characteristics,the wirter propose three ore-forming types—skarn deposit,porphyry deposit and fracture deposit,and thinks that they are metallogenic series which formed in island arc.The wirter also thinks they are the paragenesis mineralization type,and they are ore-forming zoning relationship which formed around the metallogenic rock.The wirter tend to porphyry deposit as mian ore-forming.According to the research, a porphyry deposit geological model is constructed,the ore-forming regularity and propecting target are illustrated.