八卦庙金矿控矿构造研究

STUDY ON THE ORE-CONTROL STRUCTURES OF THE BAGUAMIAO GOLD DEPOSIT

陕西风县八卦庙金矿是近期探明的特大型金矿。经研究发现它的成因与脆韧性剪切和岩浆热液蚀变有关。在八卦庙矿区至二里河铅锌矿一带发育了一条脆韧性剪切带，它控制了金矿体在走向（NWW－SEE）上的分布。金矿主要产在剪切带的脆韧性剪切条带和后期脆性剪切形成的碎裂告内；NE向在行小型断裂及其NE向节理控制了后期岩浆热液蚀变形成的矿脉的分布。在北矿带这些矿脉叠加在脆韧性剪切形成的NWW向展布的金矿体之上，形成富矿带。

The Baguamiao gold deposit of Feng County, Shaanxi is an extraordinary gold deposit,which genesis is related to brittle-ductile shear and magma hydrothermal alteration. From the Baguamiao gold mine to Erlihe lead-zinc mine there is a brittle-ductile shear zone. It controls the gold ore body extending along NWW to SEE- The gold enrichment occurs in the brittle-ductile shear zone and the cataclastic rock formed during late brittle shear process. The small NE sinistral slip fault and the NE jolnt controls the distribution of gold vein lodes formed by late hydrothermal alteration. In the north gold-ore belt,these lodes stack over the NWW gold body formed by brittle-ductile shear,and result in formation of prolific zone.