汉诺坝非橄榄岩类包体的化学和同位素特征  

Chemical and Isotopic Characterisics of Nonperidotite

作　　者：陈道公 支霞臣[1,2] 李彬贤 王银喜[3] 杨杰东 

机构地区：[1]地球空间科学系 [2]第三世界科学院中国科技大学地球科学和天文学高级研究中心 [3]南京大学现代分析中心

出　　处：《中国科学技术大学学报》1996年第4期433-438,共6页JUSTC

基　　金：国家自然科学基金

摘　　要：汉诺坝非橄榄岩包体主要是指辉石岩、辉长岩和麻粒岩，其主要元素、微量元素有较大和系统的变化，Ｎｄ、Ｓｒ、Ｐｂ同位素从非常亏损的ＤＭＭ源特征变至具ＥＭＩ和ＥＭＩ源趋势的富化特征．它们与寄主玄武岩及共生的橄榄岩包体无直接成因联系。The nonperidotite xenoliths from Hannuoba include mainly pyroxenites,gabbros and granulites,which have large and sysematic variations in major and trace element abundances. Their Nd,Sr and Pd isotopic compositions change from quite depleted DMM source components to having EMI and EMII trend enriched source components. The nonperidotitte xenoliths have no direct correlations with host basalts and peridotite inclusions and different xenoliths have their own formation mechenisms and sites in different positions.

关 键 词：同位素 微量元素 汉诺坝 矿包体 麻粒岩 辉长岩 

分 类 号：P588.12[天文地球—岩石学] P597.1[天文地球—地质学]