陕西穆家庄铜矿床成因探讨及找矿意义

Deposit genesis and its exploration significance of the Mujiazhuang copper deposit in Shaanxi Province

穆家庄铜矿床位于南秦岭凤县—柞水—山阳华力西褶皱带东部,柞水—山阳泥盆纪热水沉积盆地南缘,柞水银洞子—山阳桐木沟银铅锌铜重晶石成矿带的中部。中泥盆统大西沟组第三岩性段第一亚段上部(D2d1-33)为矿区主要赋矿层位。该矿床的形成经历热水沉积阶段,形成高背景值的含矿层或矿源层,构造阶段在区域构造和岩浆作用下,在断裂中形成工业矿体,为热水沉积—构造改造成因。该观点的确立,可望对柞水—山阳地区找矿工作产生一定的促进作用。

The Mujiazhuang copper deposit is located in the eastern part of the Fengxian-Zhashui-Shanyang Hercynian fold belt,southern Qinling mountain range,the southern part of the Devonian Shanyang-Zhashui hydrothermal sedimentary basin,the central part of the Zhashui Yindongzi-Shanyang Tongmugou Ag-Pb-Zn-Cu-Barite metallogenic belt.The main ore-bearing stratum is the upper part of the first sub-member of the third member of Mid-Devonian Daxigou group （D2d13-3）.The deposit was formed by two stages,i.e.,the formation of the ore-bearing stratum or ore-source horizon with the high concentration of mineralization elements in the hydrothermal sedimentary stage; orebodies formed in the faults in the tectonic stage by the regional structural process and magmatic activity.The deposit genesis belongs to the hydrothermal deposition superposited by the later stage structural deformation.This prospective view will play a certain role in guiding the prospecting work in the Zhashan Area.