The epilogue of Paleo-Tethyan tectonics in the South China Block: Insights from the Triassic aluminous A-type granitic and bimodal magmatism
作者: Yan XiaXisheng Xu
作者单位: 1State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
刊名: Journal of Asian Earth Sciences, 2020, Vol.190
来源数据库: Elsevier Journal
DOI: 10.1016/j.jseaes.2019.104129
关键词: South China BlockTriassicLate PermianA-type granitoidsBimodal dikesPaleo-Tethyan tectonics
原始语种摘要: Abstract(#br)Triassic aluminous A-type granitoids, mostly peraluminous biotite granites, occur in various areas in the South China Block. Here, we focus biotite granites from three plutons and one granitic dike that provide new insights into the Triassic tectono-magmatic evolution of South China Block. The peraluminous biotite granites from Zhulanbu, Xiaotao and Wengshan plutons all emplaced at ca. 225 Ma and contain Fe-rich biotites. Their high FeO T /(FeO T + MgO) and Ga/Al ratios and HFSE contents imply an aluminous A-type affinity. The geochemical features and heterogeneous Sr-Nd-Hf isotopic compositions of these A-type granitoids, together with previous results, indicate their derivation from disequilibrium partial melting of a sedimentary source or fractional crystallization of...
全文获取路径: Elsevier  (合作)
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影响因子:2.379 (2012)

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关键词翻译
关键词翻译
  • magmatism 岩浆酌
  • bimodal 双峰的
  • granitic 花岗状的
  • Triassic 三叠纪
  • aluminous 铝土的
  • tectonics 构造地质学
  • epilogue 收尾程序
  • China 中国
  • Permian 二叠纪