钦杭成矿带中新元古代海底火山喷流成矿作用—以江西万载兴源冲铜矿床为例

Meso-Proterozoic Marine Exhalative Mineralization in Qinhang Belt—An Example from Xingyuanchong Copper Deposit in Wanzai, Jiangxi

摘要: 钦杭成矿带位于华南板内，属扬子与华夏两个古陆块在晚元古代碰撞拼接带。该带及旁侧矿床按成矿系列可归纳为新元古代海底喷流沉积型铜锌矿床成矿系列和燕山期与花岗岩有关的钨锡铜铅锌多金属矿床成矿系列。该带北东端的兴源冲铜矿床为中元古代海底喷流沉积变质叠改型铜矿床，其矿化与中元古界蓟县系宜丰岩组变细碧岩、变角斑岩有密切关系，受后期韧性剪切带控制，经变质热液作用，属多次叠加成矿。

Abstract: The Qinhang belt is located along the Qinhang Neoproterozoic suture in South China, which separates the Yangtze craton and Cathaysian Blocks. Deposits along the belt can be divided into two episodes, i.e. Neoproterozoic marine exhalative Cu-Zn deposits, and Yanshanian granitoids related W-Sn-Cu-Pb-Zn deposits. Xingyuanchong copper deposit in its northeast belongs to the former series, is a Mesoproterozoic marine exhalative meta-sedimentary copper deposit, closely related with metamorphic spilite and quartz porphyry in Yifengyan Formation in Jixianian, controlled by late ductile shear zones, and superimposed mineralized after metamorphosed hydrothermal fluids processes.