金蟾山金矿床地质特征及控矿因素分析

Geological features of Golden Toad Hill gold deposit in Kalaqin,Neimeng and its ore control factors

金蟾山金矿床位于赤峰-朝阳金矿化集中区安家营子矿田内,矿区出露地层为太古代建平群变质岩,具较高的金丰度值;矿体位于安家营子岩体的中心部位,呈脉状、透镜状产于NNE向断裂中,矿石金属矿物为黄铁矿、黄铜矿及方铅矿,非金属矿物主要为石英、钾长石、斜长石,矿石呈块状、细脉状、浸染状构造,细粒、粗粒结构,发育黄铁矿化、硅化、绢云母化以及碳酸盐化等围岩蚀变;整体表现为受地层-构造-岩浆岩三位一体控制的金矿床。

The Golden Toad Hill gold deposit is located in Anjiayingzi Gold Field of the Chifeng-Chaoyang gold Mineralization Concentration Area,which strata mainly is the Archean metamorphic rocks of the Jianping Group which is rich in gold;the ore is in the middle of the Anjiayingzi rock,which appears to be bedded or podiform in the NNE faults;pyrite,chalcopyrite,galena is predominant of ore minerals.gangue mineral mainly is quartz,K-feldspar and Plagioclase,Ore structure are dominated by block,veinlet and disseminate and texture mainly is coarse structure or fine structure,wall rock alteration are developed pyrite,silicification,sericite and carbonate.On the whole mining strata,magmatic rocks and the faults control the output of ore body.