西藏昌都觉拥温泉水化学特征及热储温度估算
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本文为国家自然科学基金资助项目(编号:41502220)、中国地质调查局项目(编号:12120114024601)及西藏自治区自然科学基金资助项目(编号:XZ2019ZRG- 158)的成果。


The characteristics and reservoir temperatures of hot springs in Jueyong,Chamdo,Xizang(Tibet)
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    摘要:

    长期以来,西藏昌都觉拥温泉处于天然状态,研究该地热显示区的温泉水化学特征、确定热储温度对于下一步的综合开发利用及热害防治具有重要的现实研究意义。通过采集区内冷水及温泉水样品,进行水化学全分析及氢氧同位素分析,探讨觉拥温泉水化学特征、地下热水补给高程、热储温度及循环深度。基于数据测试结果研究得出觉拥温泉水化学类型与地表水及冷泉水不同,为HCO-3—Na+型,并富含多种微量元素。利用氢氧稳定同位素数据,计算得出补给高程为4725~4802 m。利用Na+—K+—Mg2+平衡图判断该区地下热水为未成熟水,并有冷水混入。建立硅—焓、氯—焓混合模型,分析得出觉拥热储温度为137℃左右;综合以上数据计算得出热储深度约为3801 m。

    Abstract:

    Objectives: As early as 1976, the geothermal resources in Qamdo were investigated by the Chinese Academy, but the research degree was relatively low.Right now,except for some hot springs used as bath water, most of them are discharged into rivers unemployed ,which is a waste.The paper will allow us to better understand the geochemical properties and the temperature of geothermal reservoir in the study area. Methods: The hydrogeochemical characteristics of the hot springs water in the study area are analyzed by hydrochemical analyse, which provids a better understand for the hot springs.The height of hot spring recharge is determined by the stable isotope analysis of hydrogen and oxygen.Geothermometers and mixing model are used to calculate the temperature of reservoir. Results: Different from surface water and cold spring water, the hot spring water in the study area is of HCO3—Na type and rich in various trace elements such as Li,F,H2SiO3,HBO2 and so on.The recharge area is about 4725 m to 4802 m.The comprehensive analysis results and Na+—K+—Mg2+ ternary diagram indicate that the geothermal waters of the research area have not reach full equilibrium and mixed with cold waters. The comprehensive analysis of Na+—K+,K+— Mg2+,Na+—K+—Mg2+,quarts geothermometers,silica—enthalpy diagram and chloride—enthalpy diagram suggest the reservoir temperature is about 137℃.The depth of the thermal cycle is about 3801 m.

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郭宁,刘昭,男达瓦,孙会肖,李皓婷,赵海华.2020.西藏昌都觉拥温泉水化学特征及热储温度估算[J].地质论评,66(2):499-509,[DOI].
GUO Ning, LIU Zhao, NAN Dawa, SUN Huixiao, LI Haoting, ZHAO Haihua.2020. The characteristics and reservoir temperatures of hot springs in Jueyong,Chamdo,Xizang(Tibet)[J]. Geological Review,66(2):499-509.

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  • 收稿日期:2019-05-22
  • 最后修改日期:2019-10-28
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  • 在线发布日期: 2020-03-16
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