青海省共和县玛温根地区银(金)及多金属矿矿床特征与成矿机理研究

Characteristics and Metallogenic Mechanism of Silver (Gold) and Polymetallic Deposits in the Mawengen Area,Gonghe County,Qinghai Province

玛温根地区位于鄂拉山多金属成矿带东北段,矿区出露地层为早二叠世布青山群马尔争组二段(P_1m^2),断裂以北西向断裂为主,其与矿化关系密切,岩浆岩为独立单元玛温根单元黑云母花岗闪长岩体(γδT_3)出露,蚀变类型为低温热液蚀变和动力蚀变,成矿类型为中低温热液充填银铅锌矿床,找矿标志明显,研究结果对以后的地质工作具有很重要的参考作用。

The Mawengen area is located in the northeastern part of the Erashan polymetallic metallogenic belt. The exposed strata in the mining area are the second member of the Maldis Fomlation of the Early Pemfian Buqingshan Group （Prem2） , and the fault is dominated by the northward fault. The relationship is close, the magmatic rock is the independent unit of the Mawengen unit, the biotite granodiorite （γδT3） is exposed, the alteration type is low temperature hydrothemlal alteration and dynamic alteration, and the ore-rotating type is medium-low temperature hydrothemlal filling. The silver-lead-zinc deposit has obvious prospecting indicators, and the xresearch xresults have important refexrence functions for future geological work.