气候变化领域集成服务门户(CCPortal): The Horizontal Slab Beneath East Asia and Its Subdued Surface Dynamic Response

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DOI	10.1029/2020JB021156
	The Horizontal Slab Beneath East Asia and Its Subdued Surface Dynamic Response
	Liu S.; Ma P.; Zhang B.; Gurnis M.
发表日期	2021
ISSN	21699313
卷号	126 期号:3
英文摘要	The kinematics of plate tectonics, deformation, and dynamic topography are strong indicators of coupling between plates and the mantle. East Asia is characterized by the presence of an unusually large horizontal slab that lies within the mantle transition zone. How this feature evolved and is linked to plate tectonics, deformation, and topography is poorly understood. Here, we show four-dimensional geodynamic modeling results constrained by a new deforming plate reconstruction that fits mantle architecture inferred from seismic tomography. We find that the subducted western Pacific slab was progressively torn by the Philippine Sea plate rotating clockwise during the Miocene and that northwestward mantle flow contributed to shaping the horizontal slab during subduction, leading to dynamic subsidence along the East Asia margin. The rather subdued change in dynamic topography, predicted from those models that fit the horizontal slab in the mantle, is consistent with the variation in residual topography, recorded in the stratigraphy, within only about ±200 m over the last 50 Myr during a period of no large marine inundation or retreat. The tectonics and topography of East Asia strongly contrast with those of Southeast Asia and are reflective of slabs ephemerally stagnating in the mantle below East Asia while avalanching into the lower mantle below Southeast Asia. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	deforming plate reconstruction; dynamic topography; East Asia; four-dimensional plate-mantle systems; horizontal slab; stagnant
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187272
作者单位	State Key Laboratory of Geological Processes and Mineral Resources and School of Geosciences and Resources, China University of Geosciences (Beijing), Beijing, China; Department of Earth Science and Engineering, Taiyuan University of Technology, Taiyuan, China; Seismological Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Liu S.,Ma P.,Zhang B.,et al. The Horizontal Slab Beneath East Asia and Its Subdued Surface Dynamic Response[J],2021,126(3).
APA	Liu S.,Ma P.,Zhang B.,&Gurnis M..(2021).The Horizontal Slab Beneath East Asia and Its Subdued Surface Dynamic Response.Journal of Geophysical Research: Solid Earth,126(3).
MLA	Liu S.,et al."The Horizontal Slab Beneath East Asia and Its Subdued Surface Dynamic Response".Journal of Geophysical Research: Solid Earth 126.3(2021).