河南桐柏县杨岔凹石墨矿床地质特征及找矿前景

Geological Characteristics and Prospecting Prospect of Yangchaao Graphite Deposit in Tongbai County,Henan Province

桐柏县杨岔凹石墨矿位于秦岭—大别山褶皱系北秦岭朱阳关—柳泉铺—大河石墨成矿带的东端,处在松扒断裂与大河断裂之间。杨岔凹石墨矿赋存于古元古界秦岭岩群雁岭沟岩组地层中,矿体的产出严格受地层控制,褶皱构造控制着矿体的形态和分布,矿层厚度较大且稳定;石墨矿石类型为石英片岩型晶质石墨,矿石质量良好;石墨矿床成因类型为区域沉积变质型,并经历了后期动力变质和热液叠加改造;矿体深部及沿走向延伸方向仍有很大的找矿空间。

The Yangchaao graphite deposit in Tongbai county is located in the eastern end of the Zhuyangguan-Liuquanpu-Dahe graphite metallogenic belt in the northern Qinling section of the Qinling-Dabie Mountains fold system,between the Songpa fault and the Dahe fault.The graphite deposit occurs in the Yanlinggou formation of the Paleoproterozoic Qinling rock group.The output of the ore body is strictly controlled by the strata,and the shape and distribution of the ore body are controlled by the fold structure.The thickness of the ore body is large and stable;The graphite ore type is quartz schist type crystalline graphite,and the quality of the ore is good;The genetic type of the graphite deposit is regional sedimentary metamorphism,and the deposit has undergone dynamic metamorphism and hydrothermal superimposed transformation in the later stage.In addition,there is a lot of prospecting space in the deep part of the ore body and along the strike extension direction.