气候变化领域集成服务门户(CCPortal): Deep structure at northern margin of Tarim Basin

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DOI	10.1007/s11434-008-0117-8
	Deep structure at northern margin of Tarim Basin
	Zhao JunMeng; Cheng HongGang; Pei ShunPing; Liu HongBing; Zhang JianShi; Liu BaoFeng
通讯作者	Zhao, JM (通讯作者)
发表日期	2008
ISSN	1001-6538
EISSN	1861-9541
起始页码	1544
结束页码	1554
卷号	53 期号:10
英文摘要	In this paper, a 2D velocity structure of the crust and the upper mantle of the northern margin of the Tarim Basin (TB) has been obtained by ray tracing and theoretical seismogram calculation under the condition of 2D lateral inhomogeneous medium using the data of seismic wide angle reflection/refraction profile from Baicheng to Da Qaidam crossing the Kuqa Depression (KD) and Tabei Uplift (TU). And along the Baicheng to Da Qaidam profile, 4 of the 10 shot points are located in the northern margin of the TB. The results show that the character of the crust is uniform on the whole between the KD and TU, but the depth of the layers, thickness of the crust and the velocity obviously vary along the profile. Thereinto, the variation of the crust thickness mainly occurs in the middle and lower crust. The Moho has an uplifting trend near the Baicheng shot point in KD and Luntai shot point in TU, and the thickness of the crust reduces to 42 km and 47 km in these two areas, respectively. The transition zone between the KD and TU has a thickest crust, up to 52 km. In this transition zone, there are high velocity anomalies in the upper crust, and low velocity anomalies in the lower crust, these velocity anomalies zone is near vertical, and the sediment above them is thicker than the other areas. According to the velocity distributions, the profile can be divided into three sections: KD, TU and transition zone between them. Each section has a special velocity structural feature, the form of the crystalline basement and the relationship between the deep structure and the shallow one. The differences of velocity and tectonic between eastern and western profile in the northern margin of the Tarim Basin (NMTB) may suggest different speed and intensity of the subduction from the Tarim basin to the Tianshan orogenic belt (TOB).
关键词	KUQA DEPRESSION ACCUMULATION CRUST CHINA
英文关键词	northern margin of the Tarim Basin; seismic reflection/refraction; velocity structure; geodynamics; Tianshan Orogenic Belt
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000255985900013
来源期刊	CHINESE SCIENCE BULLETIN
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/257596
推荐引用方式 GB/T 7714	Zhao JunMeng,Cheng HongGang,Pei ShunPing,et al. Deep structure at northern margin of Tarim Basin[J]. 中国科学院青藏高原研究所,2008,53(10).
APA	Zhao JunMeng,Cheng HongGang,Pei ShunPing,Liu HongBing,Zhang JianShi,&Liu BaoFeng.(2008).Deep structure at northern margin of Tarim Basin.CHINESE SCIENCE BULLETIN,53(10).
MLA	Zhao JunMeng,et al."Deep structure at northern margin of Tarim Basin".CHINESE SCIENCE BULLETIN 53.10(2008).