内蒙古自治区宁城县八家子矿区金钼矿床地质特征  

Geological features of gold molybdenum deposit in Bajiazi mining area, Ningcheng County, Inner Mongolia Autonomous Region

作　　者：于绍鹏 YU Shaopeng(Institute of Nonferrous Metal Geological Exploration of Jilin Province,Changchun 130000,Jilin,China)

机构地区：[1]吉林省有色金属地质勘查院,吉林长春130000

出　　处：《吉林地质》2022年第2期28-32,共5页Jilin Geology

摘　　要：八家子金钼矿体赋存在中太古界乌拉山岩群黑云花岗片麻岩地层中,受北东断裂构造控制,倾向南东,倾角60°~80°。主矿体为2号、2-1号,计算矿体的品位变化系数和厚度变化系数,确定矿体品位分布为均匀型、厚度变化为较稳定型。围岩蚀变黄铁矿化、硅化为主,伴生有绿泥石化、绢云母化、绿帘石化、碳酸盐化等蚀变。黄铁矿化、硅化为重要的找矿线索。通过对八家子金钼矿的地质特征、成矿条件和矿床成因的研究,得出该矿床成因类型为中低温热液充填交代叠加式石英脉型、蚀变岩型、石英脉型金鉬矿床。The Bajiazi gold molybdenum ore body occurs in the biotite-granite gneiss strata of Wulashan rock group, Mesoarchean Erathem, which is controlled by the NE fault structure and tends to the southeast with a dip angle of 60°~ 80°.The main ore body is No. 2 and No. 2-1. The grade change coefficient and thickness change coefficient of ore body are calculated, and the grade distribution of ore body is uniform type and the thickness change is stable type. The wall rock alteration is dominated by pyritization and silicification, accompanied by chloritization sericitization, epidotization, carbonization and other alterations.Pyritization and silicification are important clues for prospecting.Based on the study of the geological features, metallogenic conditions and genesis of Bajiazi gold molybdenum deposit, it is concluded that the genetic type of the deposit is the middle-low temperature hydrothermal filling metasomatic superposition quartz vein type, altered rock type and quartz vein type gold and molybdenum deposit.

关 键 词：八家子 金钼矿 地质特征 成矿规律 

分 类 号：P618.51[天文地球—矿床学]