刘伟朋,李胜涛,贾小丰,等. 太行山区阜平县温泉水化学特征及成因分析[J]. 中国矿业,2024,33(9):236-248. DOI: 10.12075/j.issn.1004-4051.20240727
    引用本文: 刘伟朋,李胜涛,贾小丰,等. 太行山区阜平县温泉水化学特征及成因分析[J]. 中国矿业,2024,33(9):236-248. DOI: 10.12075/j.issn.1004-4051.20240727
    LIU Weipeng,LI Shengtao,JIA Xiaofeng,et al. Hydrogeochemical characteristics and genesis analysis of hot spring in Fuping County, Taihang Mountain Area[J]. China Mining Magazine,2024,33(9):236-248. DOI: 10.12075/j.issn.1004-4051.20240727
    Citation: LIU Weipeng,LI Shengtao,JIA Xiaofeng,et al. Hydrogeochemical characteristics and genesis analysis of hot spring in Fuping County, Taihang Mountain Area[J]. China Mining Magazine,2024,33(9):236-248. DOI: 10.12075/j.issn.1004-4051.20240727

    太行山区阜平县温泉水化学特征及成因分析

    Hydrogeochemical characteristics and genesis analysis of hot spring in Fuping County, Taihang Mountain Area

    • 摘要: 河北省阜平县位于太行山腹地,温泉出露于变质岩地层和变质核杂岩构造区,开展温泉水化学及成因分析,对于变质岩区隆起山地型地热资源的勘查开发具有一定的指导意义。本文基于阜平县自然地理及区域地热地质背景,采用野外调查及采样测试等手段,综合运用水化学及稳定同位素等方法明确了温泉水化学特征和主要离子物质来源,初步推测了温泉的补给来源、深部热源等。阜平县温泉水质总体呈弱碱性,变质岩区温泉水化学类型为SO4-Na型,碳酸盐岩区为HCO3-Ca·Mg型,水化学演化以风化溶解作用为主导,阳离子交换作用为辅。温泉流体中的SO4 2+、Na+主要来自硫化物和硅酸盐溶解,HCO3 2−、Ca2+、Mg2+主要来自碳酸盐溶解。研究区温泉的补给水源为大气降水,并具有轻微的18O漂移现象,补给高程为1 500~2 600 m,推测补给区位于研究区西北部变质岩区和东北部的碳酸盐岩区;研究区温泉样品均达石英理论平衡溶解线,估算热储温度56.46~133.71 ℃,循环深度2 213.0~8 092.3 m;研究区温泉热源主要来自深部幔枝构造、低速高导层及构造热,韧性剪切带和深大断裂作为传热通道,地表热显示主要受控于断裂构造。研究区地热资源属于深循环可再生能源,热储温度达中高温标准,可进一步开展深部地热资源的勘查开发工作,促进当地经济绿色可持续发展,助力阜平县乡村建设。

       

      Abstract: Fuping County of Hebei Province is located in the hinterland of Taihang Mountain, and hot spring are exposed to typical metamorphic rock strata and metamorphic core complex tectonic area. The hydrogeochemical and genesis analysis of hot spring is of certain guiding significance for the exploration and development of uplift mountain type geothermal resources in metamorphic rock area. Based on the natural geography and regional geothermal geological background of Fuping County, this paper adopts the means of field investigation, sampling and testing, comprehensively applies the methods of hydrogeochemistry and stable isotope to determine the hydrogeochemical characteristics and material sources of main ions of hot spring water, and preliminarily speculates the source of hot springs recharge and deep heat resource, etc. The results show that the water quality of hot springs in Fuping County is generally alkalescent, and the hydrogeochemical type of hot spring in metamorphic rock area is SO4-Na type, in carbonate rock area is HCO3-Ca·Mg type respectively. The hydrochemical evolution is dominated by weathering dissolution effect, and supplemented by the cation change effect. The SO4 2+ and Na+ in hot spring fluids mainly come from the dissolution of sulfides and silicates, while \mathrmHCO_3^- , Ca2+ and Mg2+ mainly come from the dissolution of carbonates. The recharge source of hot springs in the study area is precipitation from the atmosphere with a slight 18O drift phenomenon, and the recharge elevation is 1 500-2 600 m. It is presumed that the recharge area is located in the metamorphic rock area in the northwest of the study area and the carbonate rock area in the northeast. All the samples of hot springs in the study area have reached the theoretical equilibrium dissolution line of quartz, with the estimated geothermal reservoir temperature ranging from 56.46-133.71℃, and the circulation depth of 2 213.0-8 092.3 m. The heat source of the hot springs in the study area are mainly from the deep mantle branch structure, low-velocity high-conductivity layer and tectonic thermal, the ductile shear zone and deep fault as heat transfer channels, and the surface heat display is mainly controlled by the fault structure. The geothermal resources in the study area belong to deep cycle renewable energy, and the geothermal reservoir temperature reaches standard of medium and high temperature, which can further carry out the exploration and development of deep geothermal resources, promote the green and sustainable development of local economy, and help the rural area construction in Fuping County.

       

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