Hydrogeochemistry of geothermal water in Huangshadong and adjacent areas of Guangdong province: Implications for water-rock interaction

IF 3.5 2区 工程技术 Q3 ENERGY & FUELS Geothermics Pub Date : 2024-06-18 DOI:10.1016/j.geothermics.2024.103084
Lu Liu , Guiling Wang , Yalu Li , Zhengan Wei , Wenjing Lin , Xianan Qin , Min Zhang , Shihua Qi , Xiting Long
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Abstract

Hydrogeochemical characteristics can reflect important information on the circulation processes of geothermal fluids, reservoir temperatures, etc., which are essential for exploring geothermal field evolution and the rational development of geothermal resources. 23 sets of water samples were collected from Huangshadong and adjacent geothermal fields. Major cations and anions, hydrogen and oxygen isotopes, and 14C activities were analyzed to investigate the hydrogeochemical characteristics of geothermal fluids and their formation mechanisms. Hydrogen and oxygen isotope analysis and major element chemistry indicate that the geothermal waters in the study area are mainly recharged by meteoric water. The chemical facies of the geothermal waters are mainly NaHCO3 and CaHCO3, and most of the geothermal waters have high Na+ contents, which are attributed to the involvement of albite in water-rock interaction and the replacement of Na+ in rocks by Ca2+ or Mg2+ in water. Geothermometry of geothermal waters suggests that the reservoir temperatures are between 140-150 ℃, and the geothermal water circulation depths range from 2.0 to 4.3 km. The residence time of up to 17.3ka for geothermal water likely suggests the earliest precipitation recharge during the Late Pleistocene. Major element chemistry and hydrogen and oxygen isotope systematics indicate essential information on the origins of geothermal waters and water-rock interaction processes and provide a more comprehensive understanding of the geothermal system in Huangshadong and adjacent areas of Guangdong province.

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广东省黄沙洞及邻近地区地热水的水地球化学:水与岩石相互作用的影响
水文地质化学特征可以反映地热流体循环过程、储层温度等重要信息,对探索地热田演化过程和合理开发地热资源至关重要。在黄沙洞及邻近地热田采集了 23 组水样。分析了主要阳离子和阴离子、氢和氧同位素以及 14C 活性,以研究地热流体的水文地球化学特征及其形成机制。氢氧同位素分析和主要元素化学成分表明,研究区的地热水主要由流星水补给。地热水的化学面主要是 Na-HCO3 和 Ca-HCO3,大部分地热水的 Na+ 含量较高,这是因为白云石参与了水与岩石的相互作用,以及水中的 Ca2+ 或 Mg2+ 取代了岩石中的 Na+。地热水的地温测量表明,储层温度在 140-150 ℃ 之间,地热水循环深度在 2.0-4.3 千米之间。地热水的停留时间长达 17.3ka,这可能表明最早的降水补给发生在晚更新世。主要元素化学和氢氧同位素系统学显示了地热水起源和水岩相互作用过程的重要信息,为更全面地了解黄沙洞及广东省邻近地区的地热系统提供了依据。
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来源期刊
Geothermics
Geothermics 工程技术-地球科学综合
CiteScore
7.70
自引率
15.40%
发文量
237
审稿时长
4.5 months
期刊介绍: Geothermics is an international journal devoted to the research and development of geothermal energy. The International Board of Editors of Geothermics, which comprises specialists in the various aspects of geothermal resources, exploration and development, guarantees the balanced, comprehensive view of scientific and technological developments in this promising energy field. It promulgates the state of the art and science of geothermal energy, its exploration and exploitation through a regular exchange of information from all parts of the world. The journal publishes articles dealing with the theory, exploration techniques and all aspects of the utilization of geothermal resources. Geothermics serves as the scientific house, or exchange medium, through which the growing community of geothermal specialists can provide and receive information.
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