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1地质概况研究区位于西伯利亚地台东南外缘,额尔古纳-呼伦深断裂西侧。出露地层有中侏罗统南平组陆相沉积岩(J2n),上侏罗统塔木兰沟组火山岩(J3t),第四系沉积物。区域上受北东向主干断裂以及北西向横向断裂形成斜交的网络状格局控制,其在矿床成矿作用中起导矿和储矿作用(王大平,1992)。
1 Geological Survey The study area is located on the southeast edge of Siberian Platform, west of Ergun-Hulun Deep Fault. The exposed strata include the Middle Jurassic Nanping Formation continental sedimentary rock (J2n), the Upper Jurassic Ta Mulanggou volcanic rock (J3t), Quaternary sediments. It is controlled by the network pattern of northeast trending faults and northwester trending transverse faults in the area, which plays the role of ore-conducting and ore-storage in mineralization of the ore deposits (Wang Daping, 1992).