| 涞源北盆地地下水氢氧同位素特征及北海泉形成模式 |
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| 引用本文： | 王忠亮,郭春艳,张彦鹏.涞源北盆地地下水氢氧同位素特征及北海泉形成模式[J].水文地质工程地质,2021,48(1):27-35. |
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| 作者姓名： | 王忠亮 郭春艳 张彦鹏 |
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| 作者单位： | 1.河北省水文工程地质勘查院，河北 石家庄 050021 |
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| 基金项目： | 中国地质调查局地质调查项目(12120114010801)。 |
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| 摘 要： | 拒马源泉群作为拒马河的源头，受到了较多专家和学者的关注。但这些研究多集中在地下水的水化学、水位动态、泉流量等特征上，对地下水氢氧同位素特征的分析几乎没有，且对北海泉的成因解释多为粗略的定性概述。为了说明涞源北盆地地下水的氢氧同位素特征，详细揭示北海泉的形成模式，首次系统地采集了不同含水岩组的地下水样品，测定了水样的氢氧同位素组分。结果表明:样品点δD和δ18O值均落在区域大气降水线上或附近，大气降水是研究区地下水的主要补给来源；白云岩、灰岩含水岩组高程效应较明显，径流途径长，松散含水层径流途径短，受蒸发作用较强；白云岩、灰岩含水岩组和松散含水层氘盈余d值分别为6.0‰～11.6‰、4.2‰～11.2‰、3.8‰～8.0‰，较大气降水大部分偏小，表明岩溶水和松散孔隙水经历了不同的流动过程；白云岩、灰岩含水岩组从补给区向排泄区各自流动过程中，在小西庄、香炉屯村附近断裂带发生沟通混合，然后在向盆地中心径流过程中受断层阻水上升，上升过程中又接受了松散孔隙水的补给，最后在松散岩层中出露成泉，形成北海泉。在孔隙水混入前，两者的平均补给比例大约为48.4%～57.6%和42.4%～51.6%。
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| 关 键 词： | 氢氧同位素 涞源北盆地 北海泉形成模式 岩溶水 松散孔隙水 |
| 收稿时间： | 2020-02-04 |
Characteristics of hydrogen and oxygen isotopes in the groundwater and formation mode of the Beihai springs in the northern Laiyuan Basin |
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| WANG Zhongliang,GUO Chunyan,ZHANG Yanpeng.Characteristics of hydrogen and oxygen isotopes in the groundwater and formation mode of the Beihai springs in the northern Laiyuan Basin[J].Hydrogeology and Engineering Geology,2021,48(1):27-35. |
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| Authors: | WANG Zhongliang GUO Chunyan ZHANG Yanpeng |
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| Affiliation: | 1.Hebei Prospecting Institute of Hydro-engineering Geology, Shijiazhuang, Hebei 050021, China2.Institute of Hydrogeology and Environmental Geology, CAGS, Shijiazhuang, Hebei 050061, China3.School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan, Hubei 430074, China |
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| Abstract: | As the source of the Jumahe River, the Juma springs has received the attention of many experts and scholars. Previous studies focused mainly on the chemical and dynamic characteristics of the groundwater and the spring discharge characteristics, the hydrogen and oxygen isotopes characteristics were seldom examined, and the explanation of the causes of the Beihai springs was only a rough qualitative overview. To illustrate the characteristics of hydrogen and oxygen isotopes of the groundwater in the northern Laiyuan Basin and reveal the forming mode of the Beihai springs in detail, groundwater samples in different aquifers were systematically collected for the first time in the study are area and the hydrogen and oxygen isotopic components were determined in this paper. The results show that the values of δD and δ18O in the water samples fall on or near the regional meteoric water line, indicating that the meteoric water is the main recharge source of the groundwater. The altitude effect is obvious and the groundwater flow path is long for the groundwater in the dolomite aquifer and limestone aquifer, the groundwater flow path is short and the evaporation effect is strong for the groundwater in the unconsolidated sediment aquifer. The deuterium excess of the sample in the dolomite aquifer, limestone aquifer and unconsolidated sediment aquifer are 6.0‰?11.6‰, 4.2‰?11.2‰ and 3.8‰?8.0‰, respectively, much smaller than that in the meteoric water, showing that the karst water and the pore water undergo different processes. When the groundwater in the dolomite aquifer and limestone aquifer flows from the recharge areas to the discharge areas, hydraulic connection and mixing occur in the fault zone near Xiaoxizhuang and Xianglutun. Groundwater rises during the process of flow to the center of the basin because of the resistance effect of the fault, and groundwater in the dolomite aquifer and limestone aquifer is subsequently recharged by the pore water in the unconsolidated sediment aquifer, at last the groundwater emerges on the ground surface in the form of springs as the Beihai springs. Before the pore water joins in, the average recharge comes from the limestone aquifer and dolostone aquifer is about 48.4%?57.6% and 42.4%?51.6%, respectively. |
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| Keywords: | hydrogen and oxygen isotopes Laiyuan northern basin Beihai springs forming mode karst water pore water |
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