气候变化领域集成服务门户(CCPortal): Formation of Rifts in Central Tibet: Insight From P Wave Radial Anisotropy

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DOI	10.1029/2018JB015801
	Formation of Rifts in Central Tibet: Insight From P Wave Radial Anisotropy
	Zhang, Heng; Li, Yunyue Elita; Zhao, Dapeng; Zhao, Junmeng; Liu, Hongbing
通讯作者	Zhang, H (通讯作者)
发表日期	2018
ISSN	2169-9313
EISSN	2169-9356
起始页码	8827
结束页码	8841
卷号	123 期号:10
英文摘要	The strikes of rifts in western Tibet show NNW-SSE trending, whereas the rifts in eastern Tibet strike in the NNE-SSW direction. The difference in the rift strike orientation suggests that the formation mechanisms of these rifts are different in southern Tibet, which can be most reliably inferred from seismic structure beneath these rifts. In this work we study 3-D P wave velocity structure and radial anisotropy using a large number of travel time data recorded by the ANTILOPE and Hi-CLIMB portable seismic arrays deployed in central Tibet. Our results show that to the west of the Pumuqu Xianza rift, a low-velocity zone with a positive radial anisotropy exists beneath the Lopu Kangri rift (similar to 85 degrees E), which may reflect melt-filled cracks. A high-velocity zone with a negative radial anisotropy is revealed beneath the Pumuqu Xianza rift (similar to 88 degrees E), which reflects lithospheric downwelling. The different upper mantle structures may result in the patterns of rift strike orientation in central Tibet.
关键词	LITHOSPHERE BENEATH SEISMIC ANISOTROPY UPPER-MANTLE AZIMUTHAL ANISOTROPY CENTRAL-ASIA SOUTHERN DEFORMATION EXTENSION TOMOGRAPHY SUBDUCTION
英文关键词	anisotropic tomography; Tibetan Plateau; lateral heterogeneity; diverse deformation patterns; rifts
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000451086200029
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259167
推荐引用方式 GB/T 7714	Zhang, Heng,Li, Yunyue Elita,Zhao, Dapeng,et al. Formation of Rifts in Central Tibet: Insight From P Wave Radial Anisotropy[J]. 中国科学院青藏高原研究所,2018,123(10).
APA	Zhang, Heng,Li, Yunyue Elita,Zhao, Dapeng,Zhao, Junmeng,&Liu, Hongbing.(2018).Formation of Rifts in Central Tibet: Insight From P Wave Radial Anisotropy.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(10).
MLA	Zhang, Heng,et al."Formation of Rifts in Central Tibet: Insight From P Wave Radial Anisotropy".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.10(2018).