汉诺坝麻粒岩相-榴辉岩相堆晶岩捕虏体——壳-幔过渡带的证据  

THE GRANULITE-ECLOGITE FACIES CUMULATE XENOLITHS IN HANNUOBA AREA -THE EVIDENCE OF THE CRUST - MANTLE TRANSITIONAL ZONE

作　　者：樊祺诚[1] 隋建立[1] 

机构地区：[1]中国地震局地质研究所,北京100029

出　　处：《中国科学基金》2001年第1期23-27,共5页Bulletin of National Natural Science Foundation of China

基　　金：国家自然科学基金资助项目;中国科学院知识创新工程项目

摘　　要：地质产状、层状堆晶构造、矿物岩石学、年代学、REE地球化学和高温高压波速实验表明,汉诺坝新生代玄武岩中的麻粒岩相和榴辉岩相堆晶岩捕虏体是显生宙以来由幔源岩浆底侵于壳-幔边界形成的镁铁质堆晶岩,分别经历了下地壳麻粒岩相变质作用和上地幔榴辉岩相变质作用。The typical occurrence, layered cumulative structures, mineralogy, petrology, chronology, REE geochemistry and velocity experience under high temperature and pressure of the granulite -eclogite facies cumulate xenoliths of Ceno-zoic basalt in Hannuoba area indicate that they are mafic cumulate formed by the mantle-derived magma underplating to the crust-mantle boundary and have undergone metamorphism of granulite-eclogite facies since Phanerozoic. The granulite -eclogite facies cumulate xenoliths is the evidence of the continental crust vertical growing and the existing of the crust-mantle transitional zone.

关 键 词：麻粒岩相 榴辉岩相 堆晶岩捕虏体 壳-幔过渡带 汉诺坝 岩石学 REE地球化学 

分 类 号：P54[天文地球—构造地质学]