[1]ZHAO Deyang,ZHOU Xiaocheng,HE Miao,et al.Hydrogeochemical Characteristics of the Hot Springs in the Daliangshan Fault Zone[J].Journal of Seismological Research,2023,46(01):26-36.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0003
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Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 01
Page number:
26-36
Column:
地震地下流体监测预报理论及技术应用专栏
Public date:
2023-01-01
- Title:
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Hydrogeochemical Characteristics of the Hot Springs in the Daliangshan Fault Zone
- Author(s):
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ZHAO Deyang1; ZHOU Xiaocheng2; HE Miao2; TIAN Jiao2; LI Jingchao2; DONG Jinyuan2; YAN Yucong2; OUYANG Shupei2; LIU Fengli2; YAO Bingyu2; WANG Yuwen2; ZENG Zhaojun2; CHEN Qufei3; ZHANG Xiaoming1; YANG Yao1; LUO Zhixin2
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(1.Sichuan Earthquake Agency,Chengdu 610041,Sichuan,China)(2.United Laboratory of High-Pressure Physics and Earthquake Science,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)(3.Economic and Technological Development Zone Brigade,Fire and Rescue Detachment of Urumqi,Fire and Rescue Department of Xinjiang Uygur Autonomous Pegion,Urumqi 830009,Xinjiang,China)
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- Keywords:
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the Daliangshan Fault Zone; hot spring; hydrogeochemistry; circulation model
- CLC:
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P315.724
- DOI:
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10.20015/j.cnki.ISSN1000-0666.2023.0003
- Abstract:
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The major elements,trace elements,and stable isotopes of 15 water samples collected from 10 thermal springs in the Daliangshan Fault Zone from 2010 to 2021 are measured to study the hydrogeochemical characteristics,and a model of hydrogeochemical migration of the hot springs in the Daliangshan Fault Zone is built.The results show that:①The values of the stable isotopes(δD and δ18O)are -86.8%—-100.54% and -11.7%—-13.7%,respectively, distributing near the atmospheric precipitation line; this indicates that the hot-spring water are recharged by the meteoric water at the elevations ranging from 2.1 km to 2.5 km.②From the north to the south of the Fault Zone,the chemical types of the hot-spring water are HCO3-Ca·Mg,SO4·HCO3-Ca·Mg,HCO3-Ca,HCO3-Na·Ca,HCO3-Na,and SO4·HCO3-Ca.③The major elements come from the water-rock reaction of carbonate minerals and silicate minerals.④The Na-K-Mg triangle diagram shows that the hot spring samples belong to “immature water”.⑤The silicon-enthalpy model is used and the geothermal reservoir temperature in this area is estimated to be between 105.9 ℃—203 ℃,the mixing ratio of the cold water is 68%—86%,and the circulation depth is 1.9 km—3.9 km.⑥The deeper the circulation of the hot-spring water is,the stronger the seismicity in the area will be.