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用石英流体包裹体Rb-Sr等时线法测得产于碱性岩体中具有超大型潜力的东坪金矿床含金石英脉的年龄为(103±8)Ma,远晚于赋矿岩体的就位时间(元古宙),显示了成岩与成矿是两期不同构造运动的产物,两者之间没有直接的成因联系。87Sr/86Sr示踪结果显示成矿物质主要来源于赋矿碱性岩体。研究结果认为,东坪金矿是后期与大气降水热液有关的改造成矿作用的产物。
The quartz vein inclusions Rb-Sr isochron method was used to determine the age of (103 ± 8) Ma in the gold deposits of the Dongping gold deposit, which has a very large potential for production in alkaline rocks. It is much later than that of the ore-bearing rocks The in-situ time of the body (Proterozoic) shows that diagenesis and mineralization are the products of two different tectonic movements, and there is no direct genetic relationship between them. The 87Sr / 86Sr tracing results show that the ore-forming materials mainly come from ore-bearing alkaline rocks. The result shows that Dongping gold deposit is the product of remoulding mineralization related to hydrothermal fluid in the later period.