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DOI	10.1007/s11430-022-1099-4
	Three-dimensional electrical structure model of the Yangbajain geothermal field in Tibet: Evidence obtained from magnetotelluric data
	Xue, Guoqiang; Chen, Weiying; Zhao, Ping; Ren, Wangqi; He, Yiming; Lv, Pengfei; Lei, Kangxin; Zhao, Yang
发表日期	2023
ISSN	1674-7313
EISSN	1869-1897
起始页码	1839
结束页码	1852
卷号	66 期号:8
英文摘要	The Yangbajain Geothermal Field in Tibet is located in the fault subsidence basin of the central Yadong-Gulu Rift Valley. The spatial distribution of the field is controlled by mountain-front fault zones on the northwestern and southeastern sides of the basin. Geothermal power has been generated in Yangbajain for more than 40 years. However, owing to the lack of three-dimensional (3D) geophysical exploration data, key geological issues related to the partial melt body of the Yangbajain Geothermal Field, such as its location, burial depth, and geometric form, as well as the ascending channel of the geothermal fluid, have for a long time been controversial. In this study, 3D inversion was performed using measured geo-electromagnetic total impedance tensor data from 47 survey points. The extracted horizontal sections at different depths and profiles, and at different lines, reflect the 3D electrical structure model of the geothermal field in the study area. Subsequently, three findings were obtained. First, the partial melt body, located below the China-Nepal Highway extending along the northeast direction, is the heat source of the Yangbajain Geothermal Field. The burial depth range of the molten body was determined to range between approximately 6.2 and 14 km. Moreover, the geothermal fluid ascended a horn-shaped circulation channel with an up-facing opening, located in the northern section of the sulfur ditch area. The study results revealed that deep rock fissures (>2 km) were not well developed and had poor permeability. In addition, no layered heat reservoirs with high water richness were observed in the northern part of the study area. However, the application of enhanced geothermal system (EGS) technology in the northern region would be essential to improving the power generation capacity of the Yangbajain Geothermal Field. In addition, the study found no deep high-temperature heat storage areas in the southern region of the study area.
关键词	Geothermal field Magnetotelluric Partial melt body 3D electrical structure Thermal reservoir geological model
英文关键词	INVERSION; SYSTEM
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001032322800001
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/283242
作者单位	Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Central South University
推荐引用方式 GB/T 7714	Xue, Guoqiang,Chen, Weiying,Zhao, Ping,et al. Three-dimensional electrical structure model of the Yangbajain geothermal field in Tibet: Evidence obtained from magnetotelluric data[J]. 中国科学院青藏高原研究所,2023,66(8).
APA	Xue, Guoqiang.,Chen, Weiying.,Zhao, Ping.,Ren, Wangqi.,He, Yiming.,...&Zhao, Yang.(2023).Three-dimensional electrical structure model of the Yangbajain geothermal field in Tibet: Evidence obtained from magnetotelluric data.SCIENCE CHINA-EARTH SCIENCES,66(8).
MLA	Xue, Guoqiang,et al."Three-dimensional electrical structure model of the Yangbajain geothermal field in Tibet: Evidence obtained from magnetotelluric data".SCIENCE CHINA-EARTH SCIENCES 66.8(2023).