玲珑金矿西山幔源脉岩地球化学特征

Geochemical Characteristics of Mantle-derived Vein Rock in Xishan Area of Linglong Gold Deposit

摘要:

玲珑西山幔源脉岩主微量元素的变化暗示了源岩很可能经历过类似俯冲带流体的交代作用，矿化流体中含有较高含量的金属矿物，具有Eu的正异常，指示了源区是深源的。脉岩中的CO2来源可能是花岗岩岩浆热液的混入，石英来源于陆壳碎屑物质部分熔融形成的S型花岗岩，硫的来源与幔源脉岩岩浆同源，或来自地幔，或来自地壳深部。

Abstract:

The change of main trace elements of the mantle-derived vein rock in Xishan mine area of Linglong gold deposit suggests the source rocks probably experienced similar metasomatism of the fluid in the subduction zone. The mineralization fluid contains many metal minerals and Eu is abnormal. It indicates that the source rocks are from deep-derived rock. The source of CO2 of vein rock maybe comes from the mixture of magmatic hydrothermal fluid. Quartz is derived from S type granite formed by partial melting of continental crust detrital material. S comes from the mantle or deep crust.