气候变化领域集成服务门户(CCPortal): Seismic evidence for the 410 km discontinuity beneath the Hindu Kush-Pamir region from the SdP converted phases

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DOI	10.1016/j.tecto.2019.06.001
	Seismic evidence for the 410 km discontinuity beneath the Hindu Kush-Pamir region from the SdP converted phases
	Cui, Qinghui; Zhou, Yuanze; Li, Wenlan; Wei, Rongqiang; Li, Guohui
通讯作者	Zhou, YZ (通讯作者)
发表日期	2019
ISSN	0040-1951
EISSN	1879-3266
起始页码	31
结束页码	39
卷号	766
英文摘要	In this study, we detect the 410 km discontinuity (410) beneath the Hindu Kush-Pamir region using broadband records of SdP converted phases. Beneath Hindu Kush, the 410 appears at the depths of 367-384 km with an average depth of 375 km; while beneath Pamir, it appears at the depths of 380-414 km with an average depth of 395 km. Compared with the Earth model IASP91, the 410 shows larger uplifts of 26-43 km with an average of 35 km beneath Hindu Kush, and smaller uplifts of 7-30 km with an average of 15 km beneath Pamir. Based on seismic tomographic images, the S410P conversion points are all located inside Indian slab beneath Hindu Kush, and near Asian slab with some of them inside the slab beneath Pamir. The 410 shows the 7-22 km uplifts with an average of 11 km near Asian slab, and the 21-30 km uplifts with an average of 25 km inside Asian slab. If depth variations are caused by the thermal heterogeneity, the 35 km uplift inside Indian slab indicates a low-temperature anomaly of 422 K; whereas the 11 km uplift near Asian slab and 25 km uplift inside Asian slab imply low-temperature anomalies of 133 K and 302 K, respectively. We suggest that the uplifts of the 410 are likely caused by cold subducted slabs, and the uplift differences imply different thermal impacts of the slabs beneath Hindu Kush and Pamir.
关键词	UPPER-MANTLE DISCONTINUITIES TRANSITION ZONE SUBDUCTION ZONES TRAVEL-TIMES BREAK-OFF EARTHQUAKES TOPOGRAPHY IMAGE INDIA PRECURSORS
英文关键词	410 km discontinuity; Olivine-wadsleyite phase transition; Hindu Kush-Pamir region; Continental subduction zone; SdP converted phases; N-th root slant stacking
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000488141100004
来源期刊	TECTONOPHYSICS
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/259412
推荐引用方式 GB/T 7714	Cui, Qinghui,Zhou, Yuanze,Li, Wenlan,et al. Seismic evidence for the 410 km discontinuity beneath the Hindu Kush-Pamir region from the SdP converted phases[J]. 中国科学院青藏高原研究所,2019,766.
APA	Cui, Qinghui,Zhou, Yuanze,Li, Wenlan,Wei, Rongqiang,&Li, Guohui.(2019).Seismic evidence for the 410 km discontinuity beneath the Hindu Kush-Pamir region from the SdP converted phases.TECTONOPHYSICS,766.
MLA	Cui, Qinghui,et al."Seismic evidence for the 410 km discontinuity beneath the Hindu Kush-Pamir region from the SdP converted phases".TECTONOPHYSICS 766(2019).