气候变化领域集成服务门户(CCPortal): Basement structure and properties of the southern Junggar Basin

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DOI	10.1016/j.jog.2018.07.007
	Basement structure and properties of the southern Junggar Basin
	Zhao, Junmeng; Deng, Gong; Xu, Qiang; Shao, Xuezhong; Zhang, Xiankang; Chen, Xinfa; Ma, Zongjin
通讯作者	Zhao, JM (通讯作者)
发表日期	2018
ISSN	0264-3707
起始页码	26
结束页码	35
卷号	121
英文摘要	We have investigated the detailed structures of velocity, density and magnetization intensity along a nearly east west profile from Liugou to Dajing across the southern Junggar Basin using the seismic converted wave profiling and joint inversion of gravity and geomagnetic data. Our observations reveal such important interfaces as interface B (the top surface of the folded basement), interface G (the top surface of the crystalline basement), interfaces C-1 and C-2 (interfaces within the crust), and the Moho (the bottom of the crust). Our results indicate that the crust of southern Junggar Basin with a thickness of 45-50 km and the average velocity of similar to 6.3 km/s is mainly composed of an upper crust (including a deposited cover), a middle crust and a lower crust. The top surface of the crystalline basement (G) and the bottom of the crust (Moho) undulate in a same way, indicating an integrated crustal deformation. A series of faults developed in the basin are oriented nearly north-south and cut through the crystalline crust. The faults serve as passageways connecting the crust and upper mantle and are inferred to have formed by north-south compression and east-west extension. We propose that materials from the upper mantle migrate upward into the crust, intrude laterally, and mix up with the crustal materials, producing a crystalline crust in the basin with high velocity, high density and high geomagnetic intensity. Our observations suggest that the southern Junggar Basin bears a single basement layer whose properties have been changed by the exchange of the materials and the energy of the crystalline crust with those from the upper mantle.
关键词	NORTHERN MARGIN TIBETAN PLATEAU CHINA
英文关键词	Junggar Basin; Seismic converted wave profiling; Joint inversion of gravity with geomagnetism; Basement structure; Basement property; Geodynamic model
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000449901200004
来源期刊	JOURNAL OF GEODYNAMICS
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/259254
推荐引用方式 GB/T 7714	Zhao, Junmeng,Deng, Gong,Xu, Qiang,et al. Basement structure and properties of the southern Junggar Basin[J]. 中国科学院青藏高原研究所,2018,121.
APA	Zhao, Junmeng.,Deng, Gong.,Xu, Qiang.,Shao, Xuezhong.,Zhang, Xiankang.,...&Ma, Zongjin.(2018).Basement structure and properties of the southern Junggar Basin.JOURNAL OF GEODYNAMICS,121.
MLA	Zhao, Junmeng,et al."Basement structure and properties of the southern Junggar Basin".JOURNAL OF GEODYNAMICS 121(2018).