气候变化领域集成服务门户(CCPortal): Response of Yunnan crustal structure to eastward growth of the Tibet Plateau and subduction of the India plate in Cenozoic

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DOI	10.1016/j.tecto.2020.228661
	Response of Yunnan crustal structure to eastward growth of the Tibet Plateau and subduction of the India plate in Cenozoic
	Ling Y.; Zheng T.; He Y.; Hou G.
发表日期	2020
ISSN	00401951
卷号	797
英文摘要	Most previous studies advocate that crustal weakening in the Yunnan area is predominantly the result of eastward growth of the Tibetan Plateau. Here we observe regional variations in the Yunnan crustal structure from the waveform characteristic variations of receiver functions at 342 seismic stations. Furthermore, receiver function imaging along three seismic sections reveals the response of crustal structure to different tectonic evolution. Our results show that northwestern Yunnan is characterized by 49–64 km-thick crust with multi-layer low-velocity materials and local lower crustal “doublet”. These low-velocity structures may reflect partial melting caused by crustal thickening associated with the eastward growth of the plateau. However, in southern and eastern parts of Yunnan, the topography of the Moho varies relatively gently with crustal thicknesses of 26–42 km, and widespread low-velocity zones are located above the crust-mantle boundary. We speculate that these features might favor the action of partial melting of crust triggered by asthenospheric upwelling related to the subduction of the India plate. © 2020 Elsevier B.V.
关键词	Asthenospheric upwelling Crustal structure Eastward growth of the Tibetan Plateau Receiver functions Yunnan Province
英文关键词	Melting; Seismology; Structural geology; Topography; Crustal structure; Crustal thickenings; Low velocity zones; Northwestern Yunnan; Receiver functions; Regional variation; Tectonic evolution; Waveform characteristics; Plates (structural components); crustal structure; crustal thickening; growth response; Indian plate; Moho; plate motion; plate tectonics; subduction zone; tectonic evolution; tectonic setting; China; Xizang; Yunnan
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207811
作者单位	Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences (CAS), Beijing, 100029, China; Innovation Academy for Earth Science, CAS, Beijing, 10029, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, CAS, Beijing, 100101, China
推荐引用方式 GB/T 7714	Ling Y.,Zheng T.,He Y.,et al. Response of Yunnan crustal structure to eastward growth of the Tibet Plateau and subduction of the India plate in Cenozoic[J],2020,797.
APA	Ling Y.,Zheng T.,He Y.,&Hou G..(2020).Response of Yunnan crustal structure to eastward growth of the Tibet Plateau and subduction of the India plate in Cenozoic.Tectonophysics,797.
MLA	Ling Y.,et al."Response of Yunnan crustal structure to eastward growth of the Tibet Plateau and subduction of the India plate in Cenozoic".Tectonophysics 797(2020).