内蒙古赤峰陈家杖子金矿床矿物学特征及成因

通过光片鉴定和电子探针分析,总结了内蒙古赤峰陈家杖子金矿床的矿石矿物组成,结构构造,划分了成矿期次.研究表明:矿床中矿石成分较复杂,硫化物种类多,有少量硫盐矿物出现;富硫贫砷毒砂、贫砷富硫黄铁矿、贫锌富铁的闪锌矿(与标准分子式相比),含杂质多的银锑黝铜矿和方铅矿与金关系密切;多金属硫化物阶段是该矿床的主要成矿阶段,其中第二世代富硫贫砷毒砂是陈家杖子金矿的最主要载金矿物,其次是方铅矿.结合流体包裹体测试和研究,确定该矿床为受大型角砾岩筒构造控制的低硫化型浅成低温热液矿床,该矿床深部有很大的找矿潜力.

Characters of mineralogy and genesis of Chenjiazhangzi gold deposit in Chifeng city, Inner Mongolia

With polished section identification and electronic microprobe analysis,this paper has studied the assemblage of the ore mineral,texture and structure,and the ore-forming stage of Chenjiazhangzi gold deposit in Chifeng city,Inner Mongolia.The study shows that the ore mineral component is complex,the sulphide is various and there is a little sulphate.Arsenopyrite and pyrite which is rich in S and poor in As,sphalerite which is rich in Fe and poor in Zn(comparing to the standard molecular formula),the Ag-Sb-bearing tetrahedrite and galena which has much impurity is closely associated with gold.The stage of polymetal sulphide is the main ore-forming stage.The second generation arsenopyrite which is rich in S and poor in As is the main mineral which carries gold.Galena is the second mineral carrying gold.Combining with fluid inclusion test and research,the deposit is determined as a low sulphidation epithermal deposit which is controlled by a large breccia pipe.And there is large prospecting potential in the deep part of the deposit.