安徽滁河断裂带温泉的水化学和同位素特征及成因分析
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

本文为国家自然科学基金资助项目(编号: 42172269、41772261)的成果


Hydrochemical and isotopic characteristics and genesis of hot springs in the Chuhe fault zone, Anhui
Author:
Affiliation:

Fund Project:

单位:
  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    笔者等以安徽滁河断裂带内的6个温泉为主要研究对象,分析了水样的水化学特征,利用氢氧同位素对温泉的补给高程进行估算,并提出温泉的成因模式。研究区温泉阳离子以Ca2+和Mg2+为主,根据SO2-4和HCO-3的相对含量的不同,可以将水样分为两组,A组水样(富HCO-3)的主要离子的质量浓度均低于B组(富SO2-4)水样,A组水样的水化学类型为HCO-3—Ca2+·Mg2+; B组水样的(除AH14为SO2-4—Ca2+外)水化学类型为SO2-4—Ca2+·Mg2+。A组水样的稀土元素含量高于B组,二者均在NASC标准化图解上表现出平坦型的配分模式,且都表现出轻稀土富集和Eu正异常的特征。水样的氢氧稳定同位素组成表明温泉的补给来源都是大气降水,补给区温度约为13~15 ℃。A组温泉的补给高程为120~160 m低于B组温泉的200~260 m,且A组温泉的热储温度为45~70℃,低于B组温泉的热储温度70~105 ℃。地下水经历深循环获得大地热流加热后沿断裂带上升出地表。

    Abstract:

    Taking 6 hot springs in the Chuhe fracture zone of Anhui Province as the main research objects, we analyze the hydrochemical characteristics of the samples of the springs, use hydrogen and oxygen stable isotopes to estimate the elevation of the recharge areas of the springs, and propose the genetic mode of the hot springs. The cation of the hot water are predominated by Ca2+ and Mg2+. Based on the different contents of SO2-4and HCO-3, the water samples can be divided into two groups. The TDS of Group A (HCO-3 enriched) are lower than those of Group B (SO42-enriched), the hydrochemical types of Group A are of HCO-3—Ca2+·Mg2+ type, the hydrochemical types of Group B are of SO2-4—Ca2+·Mg2+ type (but the hydrochemical type of AH14 is of SO2-4—Ca2+ type). The total content of rare earth element content of the Group A is higher than that of the Group B, the normalized patterns of Group A and Group B are relatively flat, and they all show high REEs depletion after NASC normalization and exist Eu positive abnormality. The hydrogen and oxygen stable isotopes of the water samples indicate that the hot springs are of meteoric origin, the temperature of the recharge areas is approximately 13~15℃. The elevations of the recharge areas of the hot springs of Group A are 120~160 m, which is lower than that of Group B (200~260 m). The estimated temperatures of the geothermal reservoirs of Group A are 45~70℃, which is lower than those of Group B (70~105℃). Groundwater undergoes a deep circulation and obtains heat from heat flow, and rises up to the land surface.

    参考文献
    相似文献
    引证文献
引用本文

隋丽嫒,周训,李状,徐艳秋,姜哲.2022.安徽滁河断裂带温泉的水化学和同位素特征及成因分析[J].地质论评,68(3):981-992,[DOI].
SUI Li’ai, ZHOU Xun, LI Zhuang, XU Yanqiu, JIANG Zhe.2022. Hydrochemical and isotopic characteristics and genesis of hot springs in the Chuhe fault zone, Anhui[J]. Geological Review,68(3):981-992.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-11-02
  • 最后修改日期:2022-03-04
  • 录用日期:
  • 在线发布日期: 2022-05-19
  • 出版日期: 2022-05-15