甘肃省玉门市大风沟金多金属矿地质特征及控矿构造研究

Geological characteristics and ore control structure of Dafenggou Gold Polymetallic deposits in Yumen City,Gansu Province

在研究甘肃省玉门市大风沟金多金属矿床地质特征的基础上,总结了矿床的控矿构造:①金多金属矿化主要赋存在下志留统肮脏沟组中上段(Sa^(2)),地层中Au地球化学背景值高,说明在沉积成岩过程中初步富集金;②闪长玢岩脉可能是该区域金矿化的主要动力源、热源以及部分矿源;③北西向压扭性断裂构造是主要的控矿构造;④矿体受热液活动范围控制较为明显,蚀变矿化对金的富集成矿有明显的控制作用。

On the basis of studying the geological characteristics of The Gold Polymetallic Deposit in Dafenggou,Yumen City,Gansu Province,the ore control structure of the deposit is summarized:①The gold polymetallic mineralization is mainly endowed with the upper part of the Lower Siloquious Dirty Ditch Group(Sa2),and the Au geochemical background value in the strata is high,indicating the initial enrichment of gold during the sedimentation process;②The eleutherophoric veins may be the main power source,heat source and part of the mineral source of gold mineralization in this area;③The north-west compressive torsional fracture structure is the main ore control structure;④The ore body is controlled by the range of activity of hydrothermal fluid,and alteration mineralization has obvious control effect on the rich integrated ore of gold.