重庆市统景温泉水化学特征及混合作用

余 琴; 杨平恒; 王长江; 李 国; 张 宇; 张 媚; 谢正兰

doi:10.11932/karst20170107

重庆市统景温泉水化学特征及混合作用

doi: 10.11932/karst20170107

1.
西南大学地理科学学院/三峡库区生态环境教育部重点实验室/国土资源部岩溶生态环境-重庆南川野外基地
2.
统景温泉旅游开发有限公司

基金项目: 国家自然科学基金项目(41103068)；重庆市院士专项(CSTC2013JCYJYS20001)；2014年度重庆市国土房管科技计划项目(CQGT-KJ-2014056)；中央高校基本科研业务费专项(XDJK2014A016、XDJK2015D022)

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出版历程
- 发布日期: 2017-02-25

Hydrochemical characteristics and mixing effect in Tongjing hot springs of Chongqing

1.
Key Laboratory of Eco-environments in Three Gorges Reservoir, Ministry of Education/School of Geographical Sciences, Southwest University/Field Scientific Observation&Research Base of Karst Eco-environmentsat Nanchuan in Chongqing
2.
Hot spring of Tongjing Development Co., Ltd

摘要

摘要: 为了探讨温泉水的热储温度、深部热水与冷水的混合作用，以期为勘探、评价和合理开发利用温泉资源提供科学依据，文章对重庆统景温泉、岩溶地下水和地表水物理化学指标进行监测和分析。结果表明：（1）温泉水化学类型为SO4-Ca·Mg型，浅层岩溶水为HCO3-Ca·Mg型，温塘河为HCO3-Ca型；温泉水TDS、Ca2+、Mg2+、SO42-、Si、B、Sr高于岩溶地下水和地表水，主要与温泉水流经碳酸盐岩热储层并发生强烈的水岩作用有关。（2）不同地热温标法的对比应用发现，阳离子和玉髓地热温标法不适用，而无蒸汽损失石英和修正后的SiO2地热温标法更适于计算统景温泉热储的温度，利用这两种方法算出来的热储平均温度为86 ℃。（3）通过Na-K-Mg三角图判断出岩溶地下水在深部含水层与地下热水发生混合。利用混合模型和硅-焓图解法估算出鸳鸯泉中冷水的混入比例分别为89%、86%；2号井中冷水的混入比例分别为80%、79%。2号井冷水混入比例比鸳鸯泉低，可能受2号井周围水泥护壁的影响。
- 水化学 /
- 地热温标 /
- 热储温度 /
- 混合作用 /
- 统景温泉
Abstract: The thermal reservoir temperature and the mixture of deep and shallow grounwater are discussed in this study, with the intention of providing a scientific basis for reasonable exploration, scientific evaluation and sustainable development and utilization of thermal water resources. Physical and chemical parameters of hot springs, karst groundwater and surface water in Tongjing, Chongqing were monitored and comparatively studied. Results show that the water chemistry of hot springs, the shallow karst water, and Wentang River belongs to type water of SO4-Ca·Mg, HCO3-Ca·Mg,and HCO3- Ca, respectively. Compared with the shallow karst groundwater and surface water, the higher values of TDS, Ca2+, Mg2+, SO42-, Si, B, and Sr are probably attributed to the runoff through the thermal reservoir formation and intense water-rock interaction. It was found that the methods of quartz without steam loss and modified SiO2 geothermometers rather than cationic and chalcedony geothermometers are more suitable for geothermometric calculation in Tongjing. An average reservoir temperature of 86 ℃ was estimated by the quartz without steam loss and modified SiO2 geothermometers. Based on the Na-K-Mg plot, the mixture of shallow karst water and thermal water occurred at deep aquifer. The mixture model and silicon-enthalpy diagram show that the ratios of mixture of cold water for the Yuanyang hot spring are 89% and 86%, respectively, and 80% and 79% for No.2 geothermal well water, respectively. The ratio of mixed cold water of No.2 geothermal well water is lower than that of the Yuanyang hot spring, probably because the No.2 geothermal well water is affected by the application of cement in the borehole wall protection.
- hydrochemistry /
- geothermometer /
- reservoir temperature /
- mixture /
- Tongjing hot spring

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