气候变化领域集成服务门户(CCPortal): Geochemical characteristics of hot springs in active fault zones within the northern Sichuan-Yunnan block: Geochemical evidence for tectonic activity

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DOI	10.1016/j.jhydrol.2024.131179
	Geochemical characteristics of hot springs in active fault zones within the northern Sichuan-Yunnan block: Geochemical evidence for tectonic activity
	Yan, Yucong; Zhang, Zuocheng; Zhou, Xiaocheng; Wang, Guangcai; He, Miao; Tian, Jiao; Dong, Jinyuan; Li, Jingchao; Bai, Yunfei; Zeng, Zhaojun; Wang, Yuwen; Yao, Bingyu; Xing, Gaoyuan; Cui, Shihan; Shi, Zheming
发表日期	2024
ISSN	0022-1694
EISSN	1879-2707
起始页码	635
卷号	635
英文摘要	The geochemistry of the fluids is spatially closely related to faults and earthquakes that have been detected in the northern Sichuan-Yunnan (SC-YN) block. However, the processes and factors that control hydrothermal fluid circulation on a regional scale remain challenging. The geochemical circulation of the hot springs integrated with geological and geophysical data revealed the processes and controlling factors of the relationship between fluid circulation and tectonic activity. Our results showed that the hydrochemical type of the hot springs at the intersection of the Yushu-Ganzi fault (YS-GZF), Xianshuihe fault (XSHF) and Yunongxi fault (YNXF), Jinshajiang fault (JSJF) and Batang fault (BTF) as well as Ganzi-Litang fault (GZ-LTF) is composed of Na-HCO3 and NaHCO3 & sdot;Cl. It demonstrated higher reservoir temperature and circulation depth (5 - 7 km). The helium isotope (0.22 - 2.36 Ra) of the gas indicated that the mantle helium composition was up to 5 - 30 %. These hot springs may undergo water-rock-gas exchange reactions with deep fluids. Considering geological and geophysical background as well as previous studies, the geochemical characteristics of the hot spring at the intersections of faults in the north of the SC-YN block are thought to be controlled by the deep-driven upwelling lower crustal flows, mixing with shallow hot spring water and the temporal and spatial heterogeneity of the high strain fields, slip rates, and permeability of the fault intersections. Whereas, the transport of fluids in hot springs of fault may increase pore fluid pressure, and reduce the effective stress at the intersection of the fault zones, which can promote fault sliding and provoke seismic events as well as fault movements. It could result in the enhancement of regional tectonic activity. This study provides an important basis for seismic prediction with hot spring hydrochemistry stations.
英文关键词	Thermal springs; Geochemical characteristics; Fluid/fault Control factor; Northern Sichuan-Yunnan (SC-YN) block
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001232526400001
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303647
作者单位	China University of Geosciences; China Earthquake Administration; Institute of Earthquake Forecasting, CEA; China University of Geosciences
推荐引用方式 GB/T 7714	Yan, Yucong,Zhang, Zuocheng,Zhou, Xiaocheng,et al. Geochemical characteristics of hot springs in active fault zones within the northern Sichuan-Yunnan block: Geochemical evidence for tectonic activity[J],2024,635.
APA	Yan, Yucong.,Zhang, Zuocheng.,Zhou, Xiaocheng.,Wang, Guangcai.,He, Miao.,...&Shi, Zheming.(2024).Geochemical characteristics of hot springs in active fault zones within the northern Sichuan-Yunnan block: Geochemical evidence for tectonic activity.JOURNAL OF HYDROLOGY,635.
MLA	Yan, Yucong,et al."Geochemical characteristics of hot springs in active fault zones within the northern Sichuan-Yunnan block: Geochemical evidence for tectonic activity".JOURNAL OF HYDROLOGY 635(2024).