Major Miocene geological events in southern Tibet and eastern Asia induced by the subduction of the Ninetyeast Ridge |
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| Authors: | Xinlei Sun Wei-dong Sun Yong-bin Hu Wei Ding Trevor Ireland Mei-zhen Zhan Ji-qiang Liu Ming-xing Ling Xing Ding Zhao-feng Zhang Wei-ming Fan |
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| Institution: | 1.State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,China;2.Center of Deep Sea Research, Institute of Oceanography,Chinese Academy of Sciences,Qingdao,China;3.Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology,Qingdao,China;4.CAS Center for Excellence in Tibetan Plateau Earth Sciences,Chinese Academy of Sciences,Beijing,China;5.CAS Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,China;6.University of the Chinese Academy of Sciences,Beijing,China;7.Research School of Earth Sciences,The Australian National University,Canberra,Australia |
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| Abstract: | Cenozoic adakitic rocks in the Gangdese changed from barren continental melts to ore-forming slab melts at ~ 23 Ma. The distribution and chemical characteristics of the ore-forming adakites point to an association with the Ninetyeast Ridge. The subduction of the thick, rigid Ninetyeast Ridge changed the geometry and rheology of the eastern Tibetan Plateau lithosphere and asthenosphere, restrained the eastward escape of asthenospheric mantle as well as continental fragments, and promoted the uplift and building of the Tibetan Plateau, which consequently changed the tectonic and climatic regimes in eastern Asia. |
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