气候变化领域集成服务门户(CCPortal): Crustal structure beneath Tien Shan orogenic belt and its adjacent regions from multi-scale seismic data

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DOI	10.1007/s11430-017-9068-0
	Crustal structure beneath Tien Shan orogenic belt and its adjacent regions from multi-scale seismic data
	Khan, N. Ghani; Bai, Ling; Zhao, JunMeng; Li, GuoHui; Rahman, M. Moklesur; Cheng, Cheng; Yang, JianYa
通讯作者	Bai, L (通讯作者)
发表日期	2017
ISSN	1674-7313
EISSN	1869-1897
起始页码	1769
结束页码	1782
卷号	60 期号:10
英文摘要	As one of the world's most active intracontinental mountain belts, Tien Shan has posed questions for researchers regarding the formation of different tectonic units and active shallow seismicity. Here, we used a huge data set comprising of 7094 earthquakes from local, regional and teleseismic seismic stations. We used waveform modeling and multi-scale double-difference earthquake relocation technique to better constrain the source parameters of the earthquakes. The new set of events provided us with better initial earthquake locations for further tomographic investigation. We found that reverse-faulting earthquakes dominate the whole study area while the fault plane solutions for earthquakes beneath the northwestern Tarim Basin and the Main Pamir Thrust are diverse. There is a low-velocity anomaly beneath Bashkaingdy at depth of 80 km, and high-velocity anomalies beneath central Tien Shan at shallower depths. These observations are the keys to understand the mechanism of Tien Shan's formation because of Tarim Basin northward and Kazakh Shield's southward subduction in the south and north respectively. Velocities beneath western Tien Shan are relatively high. We thus infer that the Western Tien Shan is relatively less deformed than the eastern Tien Shan primarily due to a relatively brittle mantle.
关键词	EARTHQUAKE LOCATION ALGORITHM RECEIVER FUNCTION TOMOGRAPHY AMBIENT NOISE TOMOGRAPHY WAVE VELOCITY STRUCTURE HINDU KUSH REGION CENTRAL-ASIA DEEP-STRUCTURE UPPER-MANTLE CENOZOIC TECTONICS DYNAMIC PROCESSES
英文关键词	Tien Shan; Earthquake relocation; Velocity anomalies; Differential subduction
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000412466600003
来源期刊	SCIENCE CHINA-EARTH SCIENCES
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/258919
推荐引用方式 GB/T 7714	Khan, N. Ghani,Bai, Ling,Zhao, JunMeng,et al. Crustal structure beneath Tien Shan orogenic belt and its adjacent regions from multi-scale seismic data[J]. 中国科学院青藏高原研究所,2017,60(10).
APA	Khan, N. Ghani.,Bai, Ling.,Zhao, JunMeng.,Li, GuoHui.,Rahman, M. Moklesur.,...&Yang, JianYa.(2017).Crustal structure beneath Tien Shan orogenic belt and its adjacent regions from multi-scale seismic data.SCIENCE CHINA-EARTH SCIENCES,60(10).
MLA	Khan, N. Ghani,et al."Crustal structure beneath Tien Shan orogenic belt and its adjacent regions from multi-scale seismic data".SCIENCE CHINA-EARTH SCIENCES 60.10(2017).