黄铁矿元素蛛网图成分标型方法及其在金矿床中的应用

黄铁矿是金矿床中普遍而重要的载金矿物,其主微量化学成分特征可反映大量成因信息。应用化学元素蛛网图成分标型方法对全国各典型成因类型金矿床及亚类型金矿床(胶东石英脉和蚀变岩型金矿床)主成矿期黄铁矿的化学成分特征进行了研究,结果表明:未经标准化的元素蛛网图仅仅可反映黄铁矿中化学成分的含量特征,而对于各类型金矿及亚成因类型的区分效果不理想;而经标准化的元素蛛网图则具有重要的标型特征,其标准化比值以及元素整体变化趋势均可良好区分各成因类型及亚类型金矿床。此方法的提出及其成功应用深化了金矿床黄铁矿的化学成分标型研究,并可类推至其他矿物化学成分的研究中,为金矿床类型划分及找矿标志提供重要参考。

A new composition typomorphism method of pyrite element spider diagram and its application in various gold deposits

Pyrite is an ordinary yet important gold-bearing mineral .The characteristics of its major and trace com-positions can indicate much genesis information .This paper proposes the composition typomorphism method of element spider diagram to study the compositions of pyrites in the main metallogenic stage of gold deposits with typical genesis types and subtypes ( quartz vein and altered rock gold deposits in Jiaodong ) .The result shows that the element spider diagram which is not standardized only reflects the content characteristic of chemical compositions in pyrites ,but can-not distinguish between gold deposits of typical genesis types as well as subtypes .However ,the element spider diagram which has been standardized shows significant typomorphism characteristics , its ratio and whole elements trend can both distinguish between gold deposits of typical genesis types as well as subtypes .The proposition and successful ap-plication of the method deepen the study of chemical composition typomorphism of pyrites in gold deposits , and the study can be referred to by other chemical composition studies and serve as reference in the classification of gold de -posit types and the extraction of prospecting indicators .