小秦岭金矿田F5断裂带基本特征、控矿作用及找矿前景

Geological characteristics and ore-controlling factors on gold deposits in Fault F_5 of Xiaoqinling Gold Field

小秦岭金矿田是中国重要的黄金产地,F5断裂带是小秦岭金矿田的一条主要控矿断裂带。该断裂带矿化程度高,控制长度达12 km,自东向西穿越桥上寨、灵湖、大湖和秦南4个金矿区,是北矿带的主要含矿断裂带,控制了北矿带大部分的金资源量。断裂带内岩石以糜棱岩、碎裂岩为主,夹少量的石英脉透镜体,金矿化分布与石英脉关系密切,石英脉分布地段往往构成工业矿体。对F5构造带的地质特征及其对金矿床的控制作用进行了系统的研究,认为断裂带深部找矿潜力巨大,矿体剥蚀程度较浅,深部还有隐伏矿体没有出露地表。通过工程验证,在断裂带深部发现了多个金矿体,实现了找矿突破,并为下一步找矿工作提供了依据。

Xiaoqinling Gold Field is an important gold-producing area in China, and Fault F5 is a major ore-controlling fault of Xiaoqinling Gold Field. The fault zone is large in scale, controlling length is up to 12 km, and this fault is of high degree of mineralization, which controls Qiaoshangzhai Gold Deposit, Linghu Gold Deposit, Dahu Gold Deposit and Qinnan Gold Deposit from east to west. The fault mainly consists of mylonite and eataclasite, dotted with a small amount of quartz vein lenses, and gold is closely related to the distribution of quartz veins, so quartz veins often constitute the industrial ore distribution area. Based on the geological features of Fauh F5 and the systematical study of its controlling effect on gold deposits show that there are good prospects for exploration of deep ore bodies ; the erosion degree of orebodies are not severe; most of the ore bodies are not exposed on the surface. After engineering verification, gold ore bodies have been discovered in the fractures at depth, a real breakthrough in search of gold deposits is achieved, and suggestions for further prospecting work of the region about gold deposits are provided.