西天山包札墩达坂-菁布拉克地区构造特征及控矿作用初步研究

RESEARCH OF STRUCTURAL GEOLOGICAL FEATURE AND ITS CONTROLLING MECHANISM OF BAOZHADUNBUDABAN- JINGBULAKE AREA IN XINJIANG

新疆西天山那拉提韧性剪切带的包札墩达坂-菁布拉克地区,断裂构造运动十分发育,规模较大的断裂达20余条,构造活动强烈,延续时间长,具多期演化的特点.依据岩石变质变形以及遥感影像特征,对其进行了研究和区分.区域性断裂既是不同地层环境分区界线,又是不同成矿带的分界线,同时控制着研究区内各种矿产的分布和成矿元素的运移.地球化学异常显示,不同方向的构造交汇部位是各元素富集的有利地段,区域性断裂表现出控矿构造的特点.区内广泛分布的韧性剪切带作为大型、超大型矿床的控矿因素,制约着韧性剪切带型矿床的地质和成矿条件,表现出明显的可比性,是寻找穆龙套式金矿的有利地段.

Fractural structures develop well in the Baozhadundaban-Jingbulake area of Xinjiang. Large-scale Fractural structures more than 20 totallly had long-time worked, which are characterized by polyphase deformation evolution. Territorial faults are not only the boundaries of ancient sedimentary basins, but also the boundaries of different mineralization zones, controlling the forming-ore spaces, movement of mineralization elements and distribution of ore-deposits. Geochemical anomalies show that the positions of structures intersection in different directions are beneficial zones for various elements enrichment, and at the same time territorial faults show the characteristics with controlling ore-formation. The ductile shear zones widely distributed as controlling factors of large and super large deposits, restrict geologies and metallogenic conditions of the ductile shear zones type gold deposits, and show chronotaxy obviously. The ductile shear zones are the beneficial zones to search for Muruntau-type gold deposits.