干旱区研究

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2024 , Vol. 41 >Issue 11: 1853 - 1863

DOI: https://doi.org/10.13866/j.azr.2024.11.06

水土资源

那棱格勒河流域氢氧同位素特征及其指示意义

  • 张寿川 ,
  • 赵春涛 ,
  • 安亚涛 ,
  • 刘凯 ,
  • 余冬梅 ,
  • 陈亮 ,
  • 李庆宽 ,
  • 王建萍
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  • 1.中国地质科学院，北京 100037
    2.中国科学院青海盐湖研究所，青海省盐湖地质与环境重点实验室，青海 西宁 810008
    3.中国科学院青海盐湖研究所，盐湖资源综合高效利用重点实验室，青海 西宁 810008
    4.河北省煤田地质局第二地质队（河北省干热岩研究中心），河北 邢台 054001
张寿川（1993-），男，博士，助理研究员，主要从事水文地球化学研究. E-mail: zhangsc@cags.ac.cn
赵春涛. E-mail: zhaoctao22@isl.ac.cn

收稿日期: 2024-08-20

  修回日期: 2024-09-14

  网络出版日期: 2024-11-29

基金资助

第二次青藏高原综合科学考察研究项目(2022QZKK0201);青海省盐湖地质与环境重点实验室开放课题项目(2024-KFKT-B10);中国地质科学院基本科研业务费(JKY202406);国家自然科学基金(U20A2088);盐湖资源综合开发与利用项目(2023ZXKYA05100)

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Hydrogen and oxygen isotopic characteristics and indicative significance in the Nalenggele River

  • ZHANG Shouchuan ,
  • ZHAO Chuntao ,
  • AN Yatao ,
  • LIU Kai ,
  • YU Dongmei ,
  • CHEN Liang ,
  • LI Qingkuan ,
  • WANG Jianping
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  • 1. Chinese Academy of Geological Science, Beijing 100037, China
    2. Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, Qinghai, China
    3. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, Qinghai, China
    4. The Second Geological Team of Hebei Coal Field Geology Bureau (Hebei Province Dry Hot Rock Research Center), Xingtai 054001, Hebei, China

Received date: 2024-08-20

  Revised date: 2024-09-14

  Online published: 2024-11-29

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摘要

本文基于那棱格勒河流域63组样品测试结果，分析流域内大气降水、河水、地下水、湖表卤水和晶间卤水的氢氧同位素和氘盈余参数分布特征及主控因素，结果表明：（1） 受到蒸发和水汽再循环的双重影响，研究区大气降水δD、δ18O均大于我国平均值，且研究区大气降水线斜率小于全球大气降水线但大于西北干旱区其他流域大气降水线，东亚季风远距离输送是导致研究区8月大气降水氘盈余偏低的主要因素。（2） 研究区河水线斜率小于全球大气降水线，河水氘盈余与δ18O、TDS呈负相关关系，均为河水经历强蒸发作用导致同位素分馏所致，研究区南部山区降雨是河水主要补给来源，高程效应导致不同区段河水δD、δ18O产生差异。（3） 不同区段地下水与地表水补给、排泄关系存在差异，加之地下水主要接受山区多源补给，导致地下水线斜率、截距均大于全球大气降水线和当地大气降水线。（4） 湖表卤水和晶间卤水均出现“氧漂移”现象，且二者氘盈余参数均小于0，这与蒸发导致氢氧同位素过度分馏密切相关，盐类矿物溶滤作用是致使晶间卤水氘盈余值小于湖表卤水的主要原因。

关键词： 氢氧同位素; 氘盈余; 干旱区流域; 那棱格勒河

本文引用格式

张寿川 , 赵春涛 , 安亚涛 , 刘凯 , 余冬梅 , 陈亮 , 李庆宽 , 王建萍 . 那棱格勒河流域氢氧同位素特征及其指示意义[J]. 干旱区研究, 2024 , 41(11) : 1853 -1863 . DOI: 10.13866/j.azr.2024.11.06

Abstract

In this study, 63 samples comprising atmospheric precipitation, river water, groundwater, lake surface brine, and intercrystaline bittern were collected from the Nalenggele River. These samples were analyzed to assess the distribution characteristics and influencing factors of hydrogen and oxygen isotope, as well as deuterium surplus. The key findings are as follows: (1) The δD and δ18O values of atmospheric precipitation in the study area are higher than the average values across China. Due to the combined effect of evaporation and water vapor recirculation, the slope of the meteoric water line in the study area is lower than the global meteoric water line but higher than that of other drainage basins in the northwest arid zone. The East Asian monsoon, which transports water vapor over long distances, is the primary factor contributing to the low deuterium surplus in the atmospheric precipitation of the study area in August. (2) The river water line slope in the study area is smaller than that of the global meteoric water line. The deuterium surplus in river water is negatively correlated with δ18O and TDS (Total dissolved solids), which is attributed to isotopic fractionation caused by evaporation. The river is primarily recharged by atmospheric precipitation from southern mountainous areas. Variations in isotopic elevation effects result in differences in δD and δ18O values across different sections of the Nalenggele River. (3) Groundwater-surface water interactions, along with the groundwater recharge from multiple sources in the southern mountainous areas, cause the slope and intercept of the groundwater lines to be larger than those of both the global and local meteoric water lines. (4) The hydrogen and oxygen isotopes of surface brine and intercrystaline brine show an “oxygen drift” phenomenon, with deuterium surplus values falling below zero. This is attributed to excessive fractionation induced by evaporation. The deuterium surplus value in intercrystaline is lower than that of surface brine, likely due to the dissolution and filtration of salt minerals.

Key words： hydrogen and oxygen isotopes; deuterium surplus; arid watershed; Nalenggele River

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