香炉碗子金矿床成矿物质来源及矿床成因

SOURCES OF METALLOGENIC MATERIARS AND ORE DEPOSIT GENESIS OF XIANGLUWANZI GOLD DEPOSIT

对香炉碗子金矿床的硫、氢、氧、铅等稳定同位素的研究表明：成矿热液来自岩浆，并有大气降水加入；岩浆热液以深源为主，有部分壳源成分的加入，属壳幔混合成因。香炉碗子次火山隐爆角砾岩形成年龄１６０～１７０Ｍａ，主要成矿年龄１２４～１５７Ｍａ，在次火山隐爆角砾岩形成之后，深部含金热液沿剪切带上升并与地下热水形成含矿热液，富含金的热液在有利构造裂隙发育地带发生交代、沉淀。

Research on the stable isotopes of S,H,O and Pb in Xiangluwanzi gold deposit shows that hydrothermal ore-forming solution comes from the magma with adding meteoric water. Magmatic hydrothermal solution largely is plutonic water with adding a part of crust-source components. It belongs to the crust-mantle mixed source. The age of formation of Xiangluwanzi subvolcanic crypto-explosive breccia is 160～170 Ma. The major ore-forming age is 124～157 Ma. After the formation of subvolcanic crypto-explosive breccia, deep-seated subvolcanic crypto-explosive breccia, deep-seated gold-bearing solution rised along the shear zone, with underground thermal water, forming ore-bearing hydrothermal solution. Gold-rich hydrothermal solution resulted to metasomatism, precipitation and formation of gold deposits.