Shoshonitic intrusive suite in SE Guangxi: Petrology and geochemistry  

作　　者：LI Xianhua ZHOU Hanwen LIU Ying LEE Chi-yu SUN Min CHEN Chenhong 

机构地区：[1]Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [2]Department of Earth Sciences,University of Hong Kong,Pokfulam Road,Hong Kong,China [3]Department of Geology,Taiwan University,Taipei 106-17,China

出　　处：《Chinese Science Bulletin》2000年第7期653-659,共7页

摘　　要：A NE-direction Mesozoic shoshonitic intrusive s黫te in SE Guangxi has been identified in terms of geological, petrological and geochemical investigations. The shoshonitic intrusives are characterized by enrichment of LILE, HFSE and LREE and no obvious Nb-Ta depletion, similar to those potassic rocks formed in within-plate and rifting environments. Unlike most shoshonitic rocks forming in arc settings, the SE Guangxi shoshonitic intrusives were likely generated during regional lithosphere extension induced by upwelling of asthenosphere mantle.A NE-direction Mesozoic shoshonitic intrusive suite in SE Guangxi has been identified in terms of geological, petrological and geochemical investigations. The shoshonitic intrusives are characterized by enrichment of LILE, HFSE and LREE and no obvious Nb-Ta depletion, similar to those potassic rocks formed in within-plate and rifting environments. Unlike most shoshonitic rocks forming in arc settings, the SE Guangxi shoshonitic intrusives were likely generated during regional lithosphere extension induced by upwelling of asthenosphere mantle.

关 键 词：shoshonitic ROCKS PETROLOGY element GEOCHEMISTRY Guangxi. 

分 类 号：P595[天文地球—地球化学]