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The conductivity characteristics of middle and upper crust of Jingyuan-Yanchi Geotraverse, Southern Ningxia arc structure belt

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Authors:Yin Bingxi; Cheng Jianhua; Min Gang; Cai Xuelin; Yang Yong
Author Affiliations:Primary:
Geological Survey of Ningxia Hui Autonomous Region, Yinchuan, China
Other:
Ningxia Bureau of Geology and Mineral Exploration and Development, China
China University of Geosciences, China
Chengdu University of Technology, China
Volume Title:Dixue Qianyuan Earth Science Frontiers
Source:Dixue Qianyuan = Earth Science Frontiers, 20(4), p.332-339. Publisher: China University of Geosciences, Beijing, China. ISSN: 1005-2321
Publication Date:2013
Note:In Chinese with English summary. 26 refs.; illus., incl. sects., geol. sketch map
Summary:By processing, interpreting and inverting magnetotelluric sounding data of a profile in the main arc structure in Ningxia Province, we revealed the electric property structure of middle Qilian folded-uplift belt, Jingyuan Xiji depression belt, Xihuasha Liupanshan folded-uplift belt, Xingren Haiyuan depression belt, Zhongwei Tongxin rift zone, Weining Beishan Luoshan depression belt, west-Ordos folded-uplift belt and 30 km depth of the Tianhuan depression belt, and the relationships among them. It can be inferred that the Qilian collision orogenic belt is of a thrust imbricate fault structure pattern, which thrusted from SW to NEN and the long pleated band in the western margin of Ordos stacked in order from east to west. The results show that low-conductivity layer in the crust is mainly distributed discontinuously in north Qilian collision orogenic belt and Xingrenbao Haiyuan depression belt in the arc structure of Southern Ningxia, and the high conductivity layer of Qilian orogenic belt is ended in Xingrenbao Haiyuan depression belt. The high conductivity layer of Xingrenbao Haiyuan depression belt is ended in the west Ordos thrust fold belt and meet the decollement layer of Ordos over thrust nappe. All in all, the low resistance layer in the crust of Southern Ningxia arc-shaped structure belt shows the characteristics of the deep southwest and the low northeast.
Subjects:Crust; Deep-seated structures; Electrical conductivity; Faults; Fold and thrust belts; Geophysical methods; Geophysical surveys; Geotraverses; Imbricate tectonics; Magnetotelluric methods; Middle crust; Nappes; Surveys; Tectonics; Thrust faults; Upper crust; Asia; China; Far East; Ningxia China; Ordos Basin; Qilian Mountains; Jingyuan-Xiji Depression; Jingyuan-Yanchin Geotraverse; Southern Ningxia arc structure belt; Weining-Beishan-Luoshan Belt; Xihuasha-Liupanshan fold belt; Xingren-Haiyuan Depression; Zhongwei-Tongxin rift zone
Coordinates:N363047 N363047 E1043717 E1043717
N373718 N373718 E1070307 E1070307
Record ID:783780-29
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute.
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