内蒙古中部渣尔泰山群微量元素地球化学特征

摘要

通过对内蒙古中部渣尔泰山群各层位岩石采样,对该山群中共43个微量元素(含稀土元素)与地壳丰度进行了对比分析,总结了该山群微量元素的地球化学特征.研究表明,该山群富集W、Re、Cu、Pb、Co等元素,而In、V、Cr、Ni等元素亏损较严重;微量元素在板岩和云母石英片岩中相对含量较高,在灰岩中相对贫化;此外,该山群稀土元素地球化学特征表现为轻稀土富集,重稀土亏损;具有明显的Eu的负异常,Ce的弱正异常.%With collecting the rock samples of different layers in Zhaertai Group in the Middle Part of Inner Mongolia, 43 trace elements ( contains rare-earth elements) were analysed, which has compared with crustal abundance, trying to summarize the trace elements geochemistry of this Group. The study shows that this group is prolific of elements such as W, Re, Cu, Pb, Co, and there are many severely depleted elements, like In, V, Cr, Ni. The trace elements is relatively higher in slate and mica quartz schist, and lower in limestone; Moreover, the rare- earth elements geochemistry exposes that Zhaertai Group is prolific of LREE, in opposite, HREE are depleted elements; this group takes on a obvious negative anomaly of Eu, and a weakly positive anomaly of Ce.