| 西藏拉萨地块南缘雄村矿集区首次发现早石炭世辉长岩: 古特提斯洋的残留? |
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| 关键词:Lhasa terrane Gangdise gabbro Paleo-Tethys Ocean Xiongcun Tibet |
| 基金项目:国家自然科学基金项目(编号: 41172077; 41502079);大陆构造与动力学国家重点实验室开放基金项目(编号: K201401);四川省教育厅自然科学重点项目(编号: 15ZA0073);四川省青年基金项目(编号: 2014JQ0047);中国地质调查局地质调查项目(编号: [资][2012]03-002-055、资[2014]01-028-042) |
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| The First Discovery of Early Carboniferous Gabbro in Xiongcun Area on the Southern Margin of Lhasa Terrane, Tibet: Remnants of Paleo-Tethys Ocean? |
| Lhasa terrane is a key area in studying the formation and evolution of Paleo-Tethys and the intra-continental convergence in the Tibetan Plateau. Lots of precious studies have been devoted to the Cenozoic geological evolution process in Lhasa terrane; nevertheless, the study of the Paleozoic evolution remains very insufficient. Focusing on the newly found Early Carboniferous gabbro in Xiongcun area on the southern margin of Lhasa terrane, the authors conducted zircon LA-ICP-MS U-Pb dating for gabbro in Xiongcun area, and investigated its tectonic significance. Zircon LA-ICP-MS U-Pb age of Xiongcun gabbro is (341.55±0.89) Ma, indicating that it was formed in Early Carboniferous epoch. Combining with the regional geological evolution process, the authors consider that Early Carboniferous Xiongcun gabbro might be the remnant of Paleo-Tethys Oceanic crust, and the newly presented dating data would provide significant constraint for studying the evolution process of Lhasa terrane and Paleo-Tethys Ocean. |
| LANG Xing-hai,TANG Ju-xing,DENG Yu-lin,XIE Fu-wei,YANG Zong-yao,CUI Zhi-wei,WANG Xu-hui,LI Zhi-jun,ZHANG Zhong,ZHANG Jin-shu,HUANG Yong.2017.The First Discovery of Early Carboniferous Gabbro in Xiongcun Area on the Southern Margin of Lhasa Terrane, Tibet: Remnants of Paleo-Tethys Ocean?[J].Acta Geoscientica Sinica,38(5):745-753. |
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