内蒙古东苏旗南部金矿控矿和预查选区分析

东苏旗南部处于内蒙古中部地槽褶皱系。区内韧-脆性剪切变质构造发育，由北至南形成3条大型韧-脆性剪切带，控制着区内所有金矿床(点)和金矿化带的分布，矿(化)体产状与韧性剪切带的大体相同，并受韧性剪切带控制。呈板状或条带状分布的具有片麻状构造和塑变流的花岗岩和闪长岩的古岩体与金矿关系最为密切，它不仅为成矿提供金等成矿物质和成矿热能，而且是区内金矿脉的直接围岩。经过长期而复杂的构造．岩浆演化，形成石英脉、蚀变岩、糜棱岩等具有剪切带特征的系列金矿床，从北至南可划分出3条金矿成矿带。在预查选区上，框定了从带入手，以带找区，再以区找体的思路。

Ore control condition and advance survey precinct of south Dongsuqi gold deposit, Inner Mongolia

The south Dongsuqi is located in the geosynclinal fold system of Middle Inner Mongolia. The ductile-brittle shear metamorphic structures are developed, there are 3 large scale ductile-brittle shear zones from north to south and controlled the distribution of all gold deposits (points) and gold mineralized belt in this area, the attitude of the ore body (mineralizing body) is similar with that of ductile shear zone. The slaty or banding granite and diorite paleo-rock body those have gneissic structure and plastic deformation flow which controlled by the ductile shear zone had close relation with gold deposit, and it not only provide ore-forming matter and ore-forming thermal power for mineralization, but also is the direct wall rock of gold mineralized vein. The long and complex structural-magma evolvement comes into a series of quartz vein type, altered rock type and mylonite type gold deposit that had shear zone features and 3 gold mineralization zones from north to south could be separated. For the advance survey precinct, it is decided to start with zone, find area from zone and find body from area.