| 四川省盐源县盐泉的特征与形成 |
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| 引用本文： | 李娜,周训,郭娟,拓明明,徐艳秋.四川省盐源县盐泉的特征与形成[J].现代地质,2020,34(1):177-188. |
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| 作者姓名： | 李娜 周训 郭娟 拓明明 徐艳秋 |
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| 作者单位： | 1.中国地质大学(北京) 水资源与环境学院,北京 1000832.中国地质大学(北京) 地下水循环与环境演化教育部重点实验室,北京 100083 |
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| 基金项目： | 国家自然科学基金项目(41572223) |
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| 摘 要： | 研究天然盐泉的形成有助于揭示陆地水文循环过程中的物质迁移。采用水文地球化学的方法,分析四川省盐源县的9个泉水和卤水水样的水化学特征和同位素特征,探讨盐泉的溶质来源,总结盐泉的成因模式。水样可以分为TDS为311.69 g/L的Cl-Na型卤水、TDS为55.77~89.43 g/L的Cl-Na型盐泉、TDS为1.17 g/L的Cl-Na型微咸泉和TDS为0.26~0.56 g/L的以HCO3-Ca、HCO3·SO4-Ca·Mg型为主的淡水泉。泉水和卤水的氢氧同位素显示其来源于大气降水;水样的特征系数显示盐泉和卤水都属于溶滤型,且指示研究区基本不具有找钾前景。泉水的盐分主要来源于石盐、方解石、石膏和白云石等矿物的溶滤。盐泉的形成模式可以概括为:在山区获得大气降水入渗补给后,地下水经历较浅和较深的地下径流并且溶滤含盐地层或者盐矿,使其矿化度升高,在地形较低处汇集出露地表成泉。
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| 关 键 词： | 盐泉 卤水 水化学 成因 四川 |
| 收稿时间： | 2019-05-16 |
| 修稿时间： | 2019-09-02 |
Characteristics and Formation of Salty Springs in Yanyuan County of Sichuan |
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| LI Na,ZHOU Xun,GUO Juan,TA Mingming,XU Yanqiu.Characteristics and Formation of Salty Springs in Yanyuan County of Sichuan[J].Geoscience——Journal of Graduate School,China University of Geosciences,2020,34(1):177-188. |
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| Authors: | LI Na ZHOU Xun GUO Juan TA Mingming XU Yanqiu |
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| Institution: | 1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China2. MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences, Beijing 100083, China |
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| Abstract: | Studies of the formation of natural salty springs are helpful in revealing the migration of substance during hydrological circulations in the land.In this paper,hydrogeochemical methods are used to analyze the hydrochemical and isotopic characteristics of nine samples of the springs and brine in Yanyuan County of Sichuan Pro-vince,explore the source of the solutes in the water samples,and summarize the genetic model of the salty springs.The samples include the brine sample with TDS of 311.69 g/L and Cl-Na type,salty springs with TDS of 55.77-89.43 g/L and Cl-Na type,brackish spring with TDS of 1.17 g/L and Cl-Na type and fresh springs with TDS of 0.26-0.56 g/L and mainly HCO3-Ca and HCO3·SO4-Ca·Mg types.The stable hydrogen and oxygen isotopes of the water samples indicate that the springs are of meteoric origin.The characteristic ion ratios show that they are of lixiviation type and have no indications of potash prospecting.The salinity of the springs is mainly derived from the incongruent dissolution of minerals such as halite,gypsum,calcite and dolomite.The formation mechanisms of salty springs are summarized as follows:after receiving infiltration of precipitation in the mountain areas,groundwater undergoes shallow and deep circulations,obtains increasing TDS as a result of the incongruent dissolution of salt-bearing strata or salt mines,and gather in lower topography to emerge to the land surface in the form of springs. |
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| Keywords: | salty spring brine hydrochemistry genesis Sichuan |
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