Shoshonitic intrusive suite in SE Guangxi: Petrology and geochemistry |
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Authors: | Xianhua Li Hanwen Zhou Ying Liu Chi-yu Lee Min Sun Chenhong Chen |
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Institution: | (1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640 Guangzhou, China;(2) Department of Earth Sciences, University of Hong Kong, Pokfulam Road, Hong Kong, China;(3) Department of Geology, Taiwan University, 106-17 Taipei, China |
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Abstract: | 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. |
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Keywords: | shoshonitic rocks petrology element geochemistry Guangxi |
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