湖南省桃源县李家冲金矿主要控矿因素及找矿方向

Major ore controlling factors and prospecting orientation of Lijiachong gold deposit in Taoyuan county,Hunan

李家冲金矿是近年来实施矿产资源补偿费项目时确定的具有一定找矿远景的金矿床。矿区地处扬子准地台江南地轴南缘的雪峰弧形构造隆起带的中段,距著名的大型沃溪金(锑钨)矿床南东约18km。金矿成矿主要受元古界板溪群马底驿组含矿层位及断裂构造双重因素控制,地层提供了矿源层,构造提供了矿化进一步富集的动力条件,使矿质得以活化、迁移并在有利成矿空间定位形成金矿体。在对矿床的地质特征和主要控矿因素分析的基础上,对进一步寻找金矿体的勘查方向进行了探讨,认为区内以郭家冲断裂为主的NE向断裂带是今后找金工作的重点,具体部位是近EW向层滑断裂破碎带与NE向断裂的交汇部位,并圈定出叶家坳-电厂、茶子山、文明等三处具体的勘查靶位,可作为矿区进一步工作部署的参考依据。

Lijiachong gold deposit, which is perspective after the project supported by state mineral source compensative finance has been put forward to the study area lately, located in the middle part of Xuefeng arc structure dome of the southern part of Jiangnan Axis of Yangtze Platform, and about 18 km from the southeast of the well-known Woxi large scale Au （W, Sb） deposit. Both Proterozoic ore bearing layer and faults of Madiyi formation of Banxi group are major ore controlling factors. Ore bearing layers offered metal source and fracture offered dynamic force for ore forming, which made the ore-forming source activated, transferred and deposited in favorable location, accumulating into gold orebodies. Based on the study of the geological character and major ore controlling factors of the deposit, prospecting targets have been point out as follow： NE striking faults, such as Guojiachong Fault, especially the intersecting areas of EW striking interlayer gliding faults and NE striking faults, such as Yejiaao-Power house, Chazishan, Wenming, are the key areas for further prospecting, and the above conclusion can be used as a reference for further prospecting dispose.