干旱区生态环境知识资源中心(Arid): The application of audio magnetotelluric for 3D geological mapping in the Gobi Desert area

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DOI	10.1002/gj.3627
	The application of audio magnetotelluric for 3D geological mapping in the Gobi Desert area
	Liu, Ying 1; Liu, Jingping 1; Chen, Chao 1; Wang, Guocan 2; Liao, Qunan 2; Zhang, Xionghua 2
通讯作者	Liu, Ying
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2020
卷号	55 期号:11 页码:7335-7345
英文摘要	Constructing the strata and bedrocks beneath the overburden for three-dimensional (3D) geological mapping in the Gobi Desert area is challenging but necessary. Rock resistivity is a key parameter to research the underground media. In the Gobi Desert area, the overburden has low resistivity, while the underlying strata and bedrocks have much higher resistivity in general. These features provide the basic conditions for distinguishing the rocks by their resistivities. The audio magnetotelluric (AMT) method is effective for investigating the electrical structure of most upper crust. Due to minor anthropogenic electromagnetic interference, good data can be easily acquired by reducing the ground resistance and by placing a remote reference station in the Gobi Desert area. WAL analysis and phase tensor method, derived from impedance tensors, can indicate the dimension of a structure, which in turn suggests whether a two-dimensional or 3D inversion needs to be used. The resistivity distribution obtained via inversion can be translated to lithological units associated with rock resistivity measurement. Combined with borehole constraint, the strata and bedrocks beneath the overburden could be explicitly described. By application of AMT, the Quaternary and Tertiary strata could be divided in the Barkol Basin by a low-resistivity layer, which was attributed to saturation with salty water. The Eocene and Jurassic strata were distinguished in the Hami Basin by 10- and 50-omega m contour lines, respectively. In both areas, high-resistivity bedrocks were clearly depicted.
英文关键词	audio magnetotelluric bedrock division Gobi Desert overburden resistivity structure
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000481722700001
WOS关键词	PHASE TENSOR ; JOINT INVERSION ; TIANSHAN ; REGION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215965
作者单位	1.China Univ Geosci, Inst Geophys & Geomat, Subsurface Multiscale Imaging Key Lab SMIL Hubei, Wuhan, Hubei, Peoples R China; 2.China Univ Geosci, Sch Earth Sci, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Liu, Ying,Liu, Jingping,Chen, Chao,et al. The application of audio magnetotelluric for 3D geological mapping in the Gobi Desert area[J],2020,55(11):7335-7345.
APA	Liu, Ying,Liu, Jingping,Chen, Chao,Wang, Guocan,Liao, Qunan,&Zhang, Xionghua.(2020).The application of audio magnetotelluric for 3D geological mapping in the Gobi Desert area.GEOLOGICAL JOURNAL,55(11),7335-7345.
MLA	Liu, Ying,et al."The application of audio magnetotelluric for 3D geological mapping in the Gobi Desert area".GEOLOGICAL JOURNAL 55.11(2020):7335-7345.