红花沟金矿地质地球化学特征及成因探讨

    GEOLOGICAL AND GEOCHEMICAL CHARACTERISTICS AND GENESIS OF HONGHUAGOU GOLD DEPOSIT,CHIFENG

    • 摘要: 红花沟金矿为含金硫化物石英脉型金矿床,主要容矿构造是NNW-SN和NNE-NE向构造裂隙,直接近矿围岩为斜长角闪岩和闪长玢岩.与钾长石化交代重熔花岗岩空间分布关系密切.岩石化学、微量元素、稀土元素及Pb、Sr、S、C、O、H同位素地球化学研究表明,成矿物质可能源于基底太古宇绿岩建造,主要为含透辉斜长角闪岩及其重熔产物,而与中生代花岗岩、火山岩无明显的物质来源联系.为与太古宇绿岩建造有关的交代重熔岩浆热液成因,成矿具同源性,继承性和多期叠加之特征.

       

      Abstract: Honghuagou gold deposit is of auriferous sulfide-quartz type,whose host structure are the fractures striking NNW to S-N and NNE to NE.The wall rock includes amphibolite and diorite porphyrite.The deposit is spacially related to K-feldspaothized metasomatic-remelting granite.Study on lithogeochemistry,microelement,REE and Pb,Sr,S,C,O and H isotopic geochemistry suggests that the ore-forming matter is derived from basemental Archean greenstone formation,mainly diopside-bearing amphibolite and its remelting products,but not genetically related to Mesozoic granite or volcanic rocks.The deposit is Archean greestone-related metasomatic-remelting magma hydrothermal origin.The mineralization is characterized by affinity,inheriting and multistage superimposition.

       

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