多金属矿床地质特征及控矿因素分析

Analysis of geological characteristics and ore-controlling factors of polymetallic deposit

研究区矿体呈似层状、透镜状分布在下二叠统栖霞组和当冲组组成的层间硅化破碎带中,地层对矿体的分布具有明显的控制性;矿石结构和构造较简单,矿石矿物以黄铜矿、辉铜矿、方铅矿、闪锌矿、黄铁矿、磁黄铁矿、斑铜矿等为主,含少量的镜状赤铁矿等;矿体受地层、岩浆岩以及构造的多重作用控制,地层和岩浆岩为提供了丰富的成矿物质,而层间破碎角砾岩带以及虚脱空间,为后期的含矿热液储闭提供了良好的储矿空间。

The orebodies in the study area are distributed in the interlayer silicified fracture zone composed of Qixia Formation and Dangchong Formation in the Lower Permian,which are stratified and lensed.The strata control the distribution of the orebodies obviously.The ore structure and structure is simple,the ore minerals are chalcopyrite,chalcocite,galena,sphalerite,pyrite,pyrrhotite,bornite,etc.,containing a small amount of vitrinite,etc.The orebody is controlled by multiple actions of stratum,magmatic rock and structure.The stratum and magmatic rock provide rich ore-forming materials,while the interbedded broken breccia belt and collapse space provide a good ore-storage space for the later ore-bearing hydrothermal storage and closure.