天水金长沟金矿地质特征、控矿因素及找矿标志

Geological characteristics,ore controlling factors,and prospecting indicators of the Jinchanggou gold deposit in Tianshui

金长沟金矿位于甘肃省天水市秦州区,该矿分布在北秦岭多金属成矿带上,处于柴家沟-吊坝子成矿亚带西部区段位置上,该矿赋存在舒家坝组第三岩性段地层当中,构造蚀变岩是该区金矿体的主要矿石类型,碎裂状石英脉型矿石分布在该区硅化较强的局部部位上,铜矿体矿石类型以含金石英脉型为主,构造蚀变岩型相对较少。区内的断裂构造对矿体起着明显的控制作用。该矿成因类型为中-低温热液蚀变型金矿床。下文中在探讨分析该矿地质特征的基础上,论述分析其控矿因素,最后对该矿的找矿标志进行总结,以期能为接下来的地质找矿工作提供一些借鉴和参考。

Jinchanggou Gold Mine is located in Qinzhou District,T ianshui C ity,Gansu Province.T he mine is distributed on the North Qinling polymetallic mineralization belt,located in the western section of the Chaijiagou Diaobazi mineralization sub belt.T he mine is hosted in the third lithological section of the Shujiaba Formation,and tectonic altered rocks are the main ore type of the gold deposit in the area.T he fragmented quartz vein type ore is distributed in the locally silicified areas of the area.T he copper deposit ore type is mainly gold bearing quartz vein type,with relatively few tectonic altered rock types.T he fault structures within the area have a significant controlling effect on the ore body.T he genesis type of this deposit is a medium low temperature hydrothermal alteration type gold deposit.On the basis of exploring and analyzing the geological characteristics of the mine,this article discusses and analyzes its controlling factors,and finally summarizes the prospecting indicators of the mine,in order to provide some reference and guidance for future geological prospecting work.