Geothermal data analysis at the high-temperature hydrothermal area in Western Sichuan

doi:10.1007/s11430-016-9053-2

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	Geothermal data analysis at the high-temperature hydrothermal area in Western Sichuan
	Zhang Jian 1,2; Li WuYang 1,2; Tang XianChun 1,2; Tian Jiao 3; Wang YingChun 3; Guo Qi 3; Pang ZhongHe 3
刊名	SCIENCE CHINA-EARTH SCIENCES
	2017-08-01
卷号	60 期号:8 页码:1507-1521
关键词	Western Sichuan Plateau Fracture zone and thermally conductive structure Deep thermal structure Heat flow estimation
ISSN号	1674-7313
DOI	10.1007/s11430-016-9053-2
文献子类	Article
英文摘要	The western Sichuan hydrothermal area is located at the northeastern margin of the eastern syntaxis of the Qinghai-Tibet Plateau, which is also the eastern end of the Mediterranean-Himalayan geothermal activity zone. There are 248 warm or hot springs in this area, and 11 have temperatures beyond the local boiling temperature. Most of these hot springs are distributed along the Jinshajiang, Dege-Xiangcheng, Ganzi-Litang, and Xianshuihe faults, forming a NW-SE hydrothermal belt. A geothermal analysis of this high-temperature hydrothermal area is an important basis for understanding the deep geodynamic process of the eastern syntaxis of the Qinghai-Tibet Plateau. In addition, this study offers an a priori view to utilize geothermal resources, which is important in both scientific research and application. We use gravity, magnetic, seismic, and helium isotope data to analyze the crust-mantle heat flow ratio and deep geothermal structure. The results show that the background terrestrial heat flow descends from southwest to northeast. The crustal heat ratio is not more than 60%. The high temperature hydrothermal active is related to crustal dynamics processes. Along the Batang-Litang-Kangding line, the Moho depth increases eastward, which is consistent with the changing Q(c)/Q(m) (crustal/mantle heat flow) ratio trend. The geoid in the hydrothermal zone is 4-6 km higher than the surroundings, forming a local "platform". The NW-SE striking local tensile stress zone and uplift structure in the upper and middle crust corresponds with the surface hydrothermal active zone. There is an average Curie Point Depth (CPD) of 19.5-22.5 km in Batang, Litang, and Kangding. The local shear-wave (S-wave) velocity is relatively low in the middle and lower crust. The S-wave shows a low velocity trap (V-s<3.2 km s(-1)) at 15-30 km, which is considered a high-temperature partial melting magma, the crustal source of the hydrothermal active zone. We conclude that the hydrothermal system in this area can be divided into Batang-type and Kangding-type, both of which rely on a crustal heating cycle of atmospheric precipitation and surface water along the fracture zone. The heat is derived from the middle and lower crust: groundwater penetrates the deep faults bringing geothermal energy back to the surface and forming high-temperature springs.
WOS关键词	EASTERN TIBETAN PLATEAU ; GARZE FOLD BELT ; TRIASSIC GRANITOIDS ; UPPER-MANTLE ; HEAT-FLOW ; CONTINENTAL AREA ; YUNNAN REGION ; FAULT ZONE ; CHINA ; DEFORMATION
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000406965600006
资助机构	National Natural Science Foundation of China(41574074 ; Chinese Academy of Sciences(KZZD-EW-TZ-19) ; Strategic Pilot Technology of Chinese Academy of Sciences(XDA1103010102) ; 41174085 ; 41430319) ; National Natural Science Foundation of China(41574074 ; Chinese Academy of Sciences(KZZD-EW-TZ-19) ; Strategic Pilot Technology of Chinese Academy of Sciences(XDA1103010102) ; 41174085 ; 41430319) ; National Natural Science Foundation of China(41574074 ; Chinese Academy of Sciences(KZZD-EW-TZ-19) ; Strategic Pilot Technology of Chinese Academy of Sciences(XDA1103010102) ; 41174085 ; 41430319) ; National Natural Science Foundation of China(41574074 ; Chinese Academy of Sciences(KZZD-EW-TZ-19) ; Strategic Pilot Technology of Chinese Academy of Sciences(XDA1103010102) ; 41174085 ; 41430319)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/61838]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Zhang Jian
作者单位	1.Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang Jian,Li WuYang,Tang XianChun,et al. Geothermal data analysis at the high-temperature hydrothermal area in Western Sichuan[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(8):1507-1521.
APA	Zhang Jian.,Li WuYang.,Tang XianChun.,Tian Jiao.,Wang YingChun.,...&Pang ZhongHe.(2017).Geothermal data analysis at the high-temperature hydrothermal area in Western Sichuan.SCIENCE CHINA-EARTH SCIENCES,60(8),1507-1521.
MLA	Zhang Jian,et al."Geothermal data analysis at the high-temperature hydrothermal area in Western Sichuan".SCIENCE CHINA-EARTH SCIENCES 60.8(2017):1507-1521.