黔东南坑头金矿床元素地球化学特征与成矿意义

The Element Geochemistry and Metallogenic Significance of Kengtou Gold Deposit,Southeast of Guizhou

与地质构造背景、矿床地质特征及控矿因素分析相结合,对黔东南坑头金矿床微量元素地球化学特征及成矿作用进行了系统研究。岩、矿石之间微量元素的含量关系以及稀土元素分布特征的相似性,揭示了含金石英脉对含金建造某些物质组分具有继承性,部分成矿物质可能来源于含金建造。蚀变围岩中As、Sb的高含量,是含矿构造中黄铁矿化、毒砂化及辉锑矿化所致。微量元素聚类分析表明成矿流体中可能先后有幔源和壳源物质的进入。含金石英脉表现出较弱的Eu正异常,表明其形成环境可能具有弱还原性质。黄铁矿化围岩及断层泥的稀土元素含量特征反映了构造蚀变矿化对围岩物质组分的继承性及差异。

The trace element geochemistry and mineralization of Kengtou gold deposit were studied systematically. The geological background, geological characteristics and ore-controlling factors were analyzed. Trace elements between rock and ores as well as REE features revealed some similarities, some material components in gold-bearing quartz veins had inheritance and some minerals may be derived from gold-bearing construction. High levels As and Sb in Altered wall rock, were caused by pyrite in the ore-bearing structure of Arsenopyritiza- tion and stibnite mineralization. The trace element cluster analysis shows that the ore-forming fluid may have in the mantle and crust-derived substances. Auriferous quartz veins show a Eu deficit by Positive anomaly, indicating the formation environment may have a weak reductive nature. Rare earth element content characteristics in Pyritized wall rock and fault gouge reflect the tectonic alteration and mineralization of the inheritance of the surrounding rock material components and differences.