[1]OU Xiaobin,BAO Zhicheng,LYU Jian,et al.Hydrogeochemical Characteristics of the Hot Springs in the Quannan-Xunwu Fault Zone[J].Journal of Seismological Research,2023,46(04):529-541.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0062
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Hydrogeochemical Characteristics of the Hot Springs in the Quannan-Xunwu Fault Zone
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 04
Page number:
529-541
Column:
Public date:
2023-07-15
- Title:
- Hydrogeochemical Characteristics of the Hot Springs in the Quannan-Xunwu Fault Zone
- Keywords:
- hot spring; chemical composition of water; hydrogen and oxygen isotope; the Quannan-Xunwu fault zone
- CLC:
- P315.724
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2023.0062
- Abstract:
- Through field investigation and sampling of the water in five hot springs in the Quannan-Xunwu fault zone,the major components,trace elements,and hydrogen and oxygen isotopes of the collected water samples are tested to find out the hydrogeochemical characteristics of the water in these five hot springs and its cause in this area.The results show that:① The temperature range of the hot springs in the Quannan-Xunwu fault zone is 42 ℃ -72 ℃; these springs belong to medium-high temperature hot springs; the water in the hot springs belong to the HCO3-Na type and the HCO3-Na-Ca type,and the HCO3-Na type water is the major part.The hot springs are rich in Na,Li,and Sr,due to the water-rock reaction between the underground hot water and the surrounding Yanshanian intermediate-acid intrusive rocks during the circulation process.② The range of δ18O isotope values is -40.38‰～-44.50 ‰,and the range of δD isotope values is -6.42‰～-6.95 ‰.These values are near the left side of the atmospheric precipitation line,indicating that the hot springs' water replenishment mainly comes from atmospheric precipitation,and some hot springs have water-gas interaction with CO2 gas therein.③ In the Quannan-Xunwu fault zone,the atmospheric precipitation flows into the deep crust along the Quannan-Xunwu fault zone,then,after cycle heating in the deep,the water flows back onto the earth's surface through the fracture channel and supplies the hot springs.In the Quannan-Xunwu fault zone,the spatial distribution and the hydrological characteristics of the hot springs have a good relationship with the earthquake activity.
- References:
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- Similar References:
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Last Update:
2023-10-01