甘肃省“五朵金花”地区关于钨锡锂等稀有金属矿成矿条件及找矿方向研究

Research on the ore-forming conditions and prospecting directions of rare metal deposits such as tungsten, tin, and lithium in the "Five Golden Flowers" area of Gansu Province

研究区位于合作-岷县-宕昌-江洛镇区域性大断裂的两侧,横跨中、南秦岭两个构造带,区内主构造线方向总体为NW-SE向。主体为夏河-礼县逆冲推覆构造带,总体构造呈北西西方向展布。褶皱、断裂构造发育,褶皱以紧闭的线状褶皱为主,断裂主要为走向逆断裂,次级走向断裂和层间破碎带也很发育。燕山期、华力西期中酸性岩浆岩十分发育,形成大的岩体、岩基及大量的中酸性岩脉,是甘肃省内热晕型金矿的主要成矿区。

The research area is located on both sides of the regional major fault in Hezuo Minxian Dangchang Jiangluo Town,spanning the central and southern Qinling tectonic belts.The overall direction of the main tectonic lines in the area is NW-SE.The main body is the Xiahe Lixian thrust nappe structural belt,with an overall structure distributed in a northwest direction.Folds and fault structures are well-developed,mainly consisting of tightly closed linear folds.The faults are mainly strike reverse faults,and secondary strike faults and interlayer fracture zones are also well developed.The Yanshan and Hualixi periods have well-developed intermediate acidic magmatic rocks,forming large rock masses,rock bases,and a large number of intermediate acidic rock veins,making them the main ore-forming areas for thermal halo type gold deposits in Gansu Province.