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[1]YAN Yucong,ZHOU Xiaocheng,ZHU Chengying,et al.Hydrogeochemical Features of the Hot Spring Water before and after the 2020,Jiashi,Xinjiang MS6.4 Earthquake[J].Journal of Seismological Research,2022,45(02):229-240.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0022 ]

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Hydrogeochemical Features of the Hot Spring Water before and after the 2020,Jiashi,Xinjiang M_S6.4 Earthquake

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 02 Page number: 229-240 Column: Public date: 2022-05-20

Title:: Hydrogeochemical Features of the Hot Spring Water before and after the 2020,Jiashi,Xinjiang M_S6.4 Earthquake

Author(s):: YAN Yucong¹; ZHOU Xiaocheng¹; ZHU Chengying²; LI Jingchao¹; LIU Fengli¹; OUYANG Shupei¹; JIANG Li³; (1.Key Laboratory of Earthquake Prediction,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)(2.Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)(3.School of the Earth Science and Resources,China University of Geosciences(Beijing),Beijing 100083,China)

Keywords:: hydrogeochemistry; hot spring; precursory anomaly; the Jiashi M_S6.4 earthquake

CLC:: P315.724

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0022

Abstract:: We sampled and tested the contents including major elements,micro-elements,hydrogen and oxygen isotopes,strontium isotope,and silicon oxide in 9 hot springs in Jiashi,Xinjiang Uygur Autonomous Region in the period 2018-2019.And we continuously monitored the hydrochemical change of the two of the hot springs in the period from September,2019 to July,2020,in order to analyze the variation of the chemical composition and isotope composition in the hot springs before the 2020,Jiashi,Xinjiang M_S6.4 earthquake.We found that:①The water samples,which are mainly controlled by the dissolution of evaporative salt rocks,and by the weathering and dissolution of carbonate and silicate rocks,could be classified into 9 chemical types.②The hydrogen and oxygen isotope indicated that the hot spring water was originated from the meteoric water and the meltwater in the surrounding mountains within 6 km.The equilibrium features of the water-rock chemical reaction indicated that the circulation depth of Wuqia mud volcano,Yingan hot spring,Taheman hot spring and Aheqi hot spring were deep and with high degree of water-rock reaction.The circulation depth of other hot springs was shallow and mixed with cold water.③By the geothermal temperature scale method,the thermal storage temperature in this region is estimated as 17 ℃ to 82 ℃,and the circulation depth ranged from 0.6 km to 3.2 km.④The concentrations of major-and trace-elements in Yingan hot spring and Taheman hot spring became significantly anomalous 19 days to 9 days before the Jiashi M_S6.4 earthquake,and the anomalous amplitude went 5% beyond the average.

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Last Update: 2022-05-20