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  4. 中国科学院新生代地质与环境重点实验室
Late Oligocene-early Miocene transformation of postcollisional magmatism in Tibet

文献类型：期刊论文

作者Guo, Zhengfu1,2; Wilson, Marjorie3
刊名GEOLOGY
出版日期2019-08-01
卷号47期号:8页码:776-780
ISSN号0091-7613
DOI10.1130/G46147.1
英文摘要Uplift of the Tibetan Plateau is thought to be one of the most important orogenic and climate forcing events of the Cenozoic Era, associated with geodynamic changes related to India-Asia collision and subsequent continental lithosphere subduction. However, the fate and scale of the subducted continental lithosphere segments remain highly controversial. Using a comprehensive compilation of the spatiotemporal distribution of postcollisional magmatic rocks across Tibet, together with new geochemical and Sr-Nd-Pb isotopic data and modeling simulations, we propose a holistic, two-stage evolutionary model to explain the link between genesis of the magmas and continental subduction. The magmatism prior to 25 Ma resulted from continuous upwelling of a carbonate-rich upper-mantle plume induced by northward underthrusting of Indian oceanic and continental lithosphere with its cover of Tethyan platform carbonate sediments, whereas magmatism after 25 Ma was related to opposing north-directed and south-directed continental subduction. Our model indicates a transformation in the distribution and nature of the magmatism in Tibet at ca. 25 Ma, which reflects a significant change in the Himalayan-Tibetan orogen and associated mantle dynamic processes in the early Miocene. Understanding this transformation could have important implications for the utility of the Himalayan-Tibetan system as a modern analogue for ancient orogens.
WOS关键词EAST-WEST EXTENSION ; MAFIC MAGMATISM ; NORTHERN TIBET ; SOUTHERN TIBET ; MANTLE SOURCE ; CONSTRAINTS ; SUBDUCTION ; CRUSTAL ; ROCKS ; INDIA
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0702] ; Key Research Project of Frontier Sciences of the Chinese Academy of Sciences[QYZDY-SSW-DQC030] ; National Natural Science Foundation of China[41772355]
WOS研究方向Geology
语种英语
WOS记录号WOS:000476707800027
出版者GEOLOGICAL SOC AMER, INC
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research ; Key Research Project of Frontier Sciences of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research ; Key Research Project of Frontier Sciences of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research ; Key Research Project of Frontier Sciences of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research ; Key Research Project of Frontier Sciences of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/92944]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Guo, Zhengfu
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
2.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
3.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
推荐引用方式
GB/T 7714		 Guo, Zhengfu,Wilson, Marjorie. Late Oligocene-early Miocene transformation of postcollisional magmatism in Tibet[J]. GEOLOGY,2019,47(8):776-780.
APA Guo, Zhengfu,&Wilson, Marjorie.(2019).Late Oligocene-early Miocene transformation of postcollisional magmatism in Tibet.GEOLOGY,47(8),776-780.
MLA Guo, Zhengfu,et al."Late Oligocene-early Miocene transformation of postcollisional magmatism in Tibet".GEOLOGY 47.8(2019):776-780.

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来源：地质与地球物理研究所

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