黔东南那哥铜多金属矿床微量元素地球化学

Trace Elements Geochemistry of Nage Cu Polymetal Deposit,SE Guizhou Province,China

采集了那哥铜多金属矿床主断层(宰便—加榜断层)、次级矿化断层及含矿次断层上下盘样品和辉绿岩样品,利用电感耦合等离子体质谱(ICP-MS)等进行了微量元素含量分析。结果表明,地层中成矿元素Cu、Pb含量低,而构造破碎带内和那哥辉绿岩体中成矿元素Cu、Pb等含量高;地层、构造及岩体样品中成矿元素As、Zn等含量基本相同。地层、构造及岩体微量元素对比结果显示,那哥铜多金属矿床成矿元素主要来自岩浆活动,但不排除青白口系浅变质沉积岩的贡献。

The ICP-MS results of the samples from the main fault （Zaibian-Jiabang fault）, sub-metallization fault and metallization fault and diabase indicate that the structure control is very patency. The metallogenetic elements such as Cu and Pb are low in stratum samples, but those are high in tectonic position samples and diabase samples. Howev- er, the contents of As, Zn and other metallogenetic elements are almost the same for stratum samples, fault samples and diabase samples. The contrast of trace elements in stratum samples, fault samples and diabase samples show that the ore-forming elements come from magma-hydrothermal origin mainly, but couldn＇ t except the contribution of Qing- baikou metamorphic sedimentary stratum.