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Reviewing subduction initiation and the origin of plate tectonics:What do we learn from present-day Earth?

Earth and Planetary Physics 2021年第2期5卷 123-140页

作者： Gang Lu Liang Zhao Ling Chen Bo Wan FuYuan Wu State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

The theory of plate tectonics came together in the 1960s,achieving wide acceptance after *** then it has been the most successful framework for investigations of Earth’s *** of the oceanic lithosphere,as the engine that drives plate tectonics,has played a key role in the ***,one of the biggest unanswered questions in Earth science is how the first subduction was initiated,and hence how plate tectonics *** main challenge is how the strong lithosphere could break and bend if plate tectonics-related weakness and slab-pull force were both *** this work we review state-of-the-art subduction initiation(SI)models with a focus on their prerequisites and related driving *** note that the plume-lithosphere-interaction and mantleconvection models do not rely on the operation of existing plate tectonics and thus may be capable of explaining the first *** of plate-driving mechanisms reveals that mantle drag may be the missing driving force for surface plates,capable of triggering initiation of the first *** propose a composite driving mechanism,suggesting that plate tectonics may be driven by both subducting slabs and convection currents in the *** also discuss and try to answer the following question:Why has plate tectonics been observed only on Earth?

关键词： subduction initiation plate tectonics mantle convection driving force mantle drag

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