闽北政和洋后变质超镁铁岩的岩石地球化学及矿物化学研究  

PETROCHEMISTRY AND MINERAL CHEMISTRY STUDIES ONMETAMORPHIC ULTRAMAFIC ROCKS IN YANGHOUAREA,ZHENGHE COUNTY,FUJIAN PROVINCE,CHINA

作　　者：任胜利[1] 李继亮[1] 周新华 孙敏[1] 

机构地区：[1]中国地质大学(北京)地质矿产系,中国科学院地质研究所,香港大学地球科学系

出　　处：《地球化学》1997年第4期13-23,共11页Geochimica

基　　金：国家自然科学基金;博士后基金

摘　　要：岩石化学研究表明，洋后变质用镁铁岩是由变质方辉橄榄岩和变质超镁铁堆积岩组成。变质方辉橄榄岩的微量元素地球化学及矿物化学特征表明，应为亏损的残余地幔产物。通过系统的岩石地球化学、矿物化学及年代学研究，认为洋后变质超镁铁岩可能为华南晚震旦－早古生代的蛇绿岩组成部分。Petrochemistry studies indicate that the Yanghou metamorphic ultramafic rocksare composed of metamorphosed harzburgite and burgite and ultramafic cumulate . Trace element geochemistry and mineral chemistry studies on the metamorphosed harzburgite indicate that it is the relict of the depleted mantle. From systematic studies on petrochemistry , mineral chemistry and geochronology, it's concluded that the Yanghou metamorphic ultramafic rocks are components of Later Sinian-Early Paleozoic ophiolite in South China .

关 键 词：岩石地球化学 矿物化学 变质超镁铁岩 铁质岩 

分 类 号：P588.242[天文地球—岩石学] P584[天文地球—地质学]