康定榆林、二道桥地热水同位素特征及成因浅析

刘祥; 骆志红; 贾志泉; 罗林洪

刘祥,骆志红,贾志泉,罗林洪.康定榆林、二道桥地热水同位素特征及成因浅析[J].贵州地质,2025,42(2):235-244

康定榆林、二道桥地热水同位素特征及成因浅析

Isotopic Characteristics and Genesis of Geothermal Water in Yulin and Erdaoqiao，Kangding in Sichuan

投稿时间：2025-02-12

DOI：

中文关键词: 康定地热水水-岩作用同位素地热温标成因模式

英文关键词:Kangding geothermal water Water-rock interaction Isotopes Geothermal temperature scale Causal mode

基金项目:四川省地质局项目(编号:SCDZ-DH202402)资助

作者	单位
刘祥	四川省地质局第三地质大队，四川郫都611700
骆志红	四川省地质局第三地质大队，四川郫都611700
贾志泉	四川省地质局第三地质大队，四川郫都611700
罗林洪	四川省地质局第三地质大队，四川郫都611700

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中文摘要:

地热资源开发利用的基础在于探究地热水的成因。本研究基于康定近城区地热水的水化学数据，利用水化学、同位素、地热温标等方法探究了地热水的成因机制。研究显示:康定近城区地热水为以深大断裂导通的幔源热、岩浆退变热、机械摩擦热等为主要热源的对流型带状热储，补给来源为海拔3 022923 30883 m处的大气降水和冰雪融水，补给区温度约为-189℃ -516℃，水化学类型主要为HCO3-Na型水(榆林)与HCO3-Ca型水(二道桥)，水-岩作用较弱，主要为硅酸盐矿物的溶解和阳离子交换作用。康定近城区地处鲜水河断裂与磨西断裂交汇处，地热水受雅拉沟断裂与榆林河断裂控制，岩层裂隙为地热水运移的主要通道，其循环深度约2 4117 4 2116 m(二道桥)与4 21164 3382 m(榆林)，热储温度范围为524℃1104℃(二道桥)与8014℃1318℃(榆林)。本次研究成果可为康定市近城区地热资源的开发利用提供有力支撑。

英文摘要:

The foundation of geothermal resource development and utilization lies in exploring the genesis of geothermal waterThis study is based on the hydrochemical data of geothermal water in the near-urban area of Kangding，and uses hydrochemistry，isotopes，geothermal thermometry，and other methods to explore the genetic mechanism of geothermal waterResearch shows that the geothermal water in the near urban area of Kangding is a convective band-shaped thermal reservoir with deep faults as the main heat source，including mantle-derived heat，magmatic degradation heat，and mechanical friction heatThe recharge source is atmospheric precipitation and snow and ice meltwater at an altitude of 3 022923 30883 mThe temperature in the recharge area is about -189℃-516℃，and the hydrochemical type is mainly HCO3-Na water(Yulin)and HCO3-Ca water(Erdaoqiao)The water-rock interaction is weak，mainly due to the dissolution of silicate minerals and cation exchangeThe urban area of Kangding is located at the intersection of the Xianshui River fault and the Moxi faultThe geothermal water is controlled by the Yalagou fault and the Yulin River faultThe rock fissures are the main channels for the migration of geothermal water，with a circulation depth of about 2 41174 2116 m(Erdaoqiao)and 4 21164 3382 m(Yulin)，and a heat storage temperature range of 524℃1104℃(Erdaoqiao)and 8014℃1318℃(Yulin)The research results can provide strong support for the development and utilization of geothermal resources in the near urban area of Kangding City

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