Hydrogeochemical and seismic activity characteristics of hot springs in Daocheng area, Sichuan Province

WANG Yuwen; ZHOU Xiaocheng; HE Miao; TIAN Jiao; LI Jingchao; DONG Jinyuan; YAN Yucong; LIU Fengli; YAO Bingyu; ZENG Zhaojun; CHEN Qufei

doi:10.19826/j.cnki.1009-3850.2023.04011

2023 Vol. 43, No. 2

Article Contents

Article navigation > Sedimentary Geology and Tethyan Geology > 2023 > 43(2): 373-387

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WANG Yuwen, ZHOU Xiaocheng, HE Miao, TIAN Jiao, LI Jingchao, DONG Jinyuan, YAN Yucong, LIU Fengli, YAO Bingyu, ZENG Zhaojun, CHEN Qufei. 2023. Hydrogeochemical and seismic activity characteristics of hot springs in Daocheng area, Sichuan Province. Sedimentary Geology and Tethyan Geology, 43(2): 373-387. doi: 10.19826/j.cnki.1009-3850.2023.04011

Citation:

WANG Yuwen, ZHOU Xiaocheng, HE Miao, TIAN Jiao, LI Jingchao, DONG Jinyuan, YAN Yucong, LIU Fengli, YAO Bingyu, ZENG Zhaojun, CHEN Qufei. 2023. Hydrogeochemical and seismic activity characteristics of hot springs in Daocheng area, Sichuan Province. Sedimentary Geology and Tethyan Geology, 43(2): 373-387. doi: 10.19826/j.cnki.1009-3850.2023.04011

Hydrogeochemical and seismic activity characteristics of hot springs in Daocheng area, Sichuan Province

1.
United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting CEA, Beijing 100036, China
2.
Economic and Technological Development Zone Brigade, Fire and Rescue Detachment of Urumqi, Fire and Rescue department of Xinjiang, Urumqi 830009, China

More Information

Corresponding author: ZHOU Xiaocheng, zhouxiaocheng188@163.com

Received Date: 23 December 2022

Revised Date: 16 April 2023

Accepted Date: 16 April 2023

Publish Date: 30 June 2023

Abstract

Abstract

Daocheng area is located in the northern part of Sichuan-Yunnan block on the southeastern margin of Qinghai-Tibet Plateau. In order to reveal the geochemical characteristics of hot spring fluid and the relationship between the fluid and seismic activity in this area, hot spring water samples and gas samples from six hot springs in Daocheng area were collected, and the ion components and concentrations in hot spring water, gas components and gas isotopes of hot spring were tested. The following conclusions are obtained: the chemical types of hot spring water in the study area are mainly HCO₃-Na and HCO₃-Na·Ca types. The Reservoir temperature is estimated to be between 74℃ and 159℃ by cationic temperature scale, and the circulation depth is between 2.2 km and 5.0 km. The CO₂ in the hot spring gas is mainly generated by the decomposition or dissolution of the carbonate rocks in the reservoir, and the proportion of helium from the mantle component is relatively low, ranging from 0.4% to 2.4%. The hot spring in the study area is formed by the heating of the deep crustal heat source caused by the atmospheric precipitation penetrating along the fault zone. In Daocheng area, the geochemical characteristics of hot spring fluid such as circulation depth and contribution rate of mantle-derived gas have a good correlation with seismic activity, and the seismic activity of the study area is weaker than that of deep fluid upwelling areas such as the surrounding Xianshuihe fault area. At the same time, in the regional scale, the future seismic activity in the Zhongdui hot spring area of Daocheng, located at the intersection of faults, is the most noteworthy.
- Hot spring /
- Hydrogeochemistry /
- Isotope /
- Seismicity /
- Daocheng

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