山西夏县热水井氢氧稳定同位素动态特征及成因  

Dynamic characteristics and genesis of hydrogen and oxygen stable isotopes in Hot Water Wells in Xiaxian County,Shanxi Province

作　　者：常姣[1,2] 张磊 黄春玲[1,2] 张淑亮[2,5] 王洪峰[1,2] CHANG Jiao;ZHANG Lei;HUANG Chuning;ZHANG Shuiang;WANG Hongfeng(Yuncheng Earthquake Monitoring Center Station,Shanxi Earthquake Agency,Yuncheng 044400,China;Nation Continental Rift Valley Dynamics Observatory of Taiyuan•Shanxi Province,Taiyuan 030025,China;National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China;Key Laboratory of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China;Shanxi Earthquake Agency,Taiyuan 030025,China)

机构地区：[1]山西省地震局运城地震监测中心站,山西运城044400 [2]太原大陆裂谷动力学国家野外科学观测研究站,太原030025 [3]应急管理部国家自然灾害防治研究院,北京100085 [4]中国地震局地壳动力学重点实验室,北京100085 [5]山西省地震局,太原030025

出　　处：《华北地震科学》2023年第2期69-74,共6页North China Earthquake Sciences

基　　金：中国地震局三结合监测、预报、科学项目“夏县热水区氢氧同位素特征及其影响因素研究”(3JH-202201004)。

摘　　要：利用山西夏县热水井水样的试验数据、SiO 2温标等,对该井氢氧稳定同位素组成特征、热水补给源以及循环深度等问题进行了研究。结果显示:①夏县热水井δ18O的变化范围为−10.10‰~−9.47‰,δD的变化范围为−72.75‰~−71.32‰;②夏县热水井氢氧稳定同位素基本位于大气降水线附近,但向右偏移大气降水线,说明夏县热水井的补给源主要为大气降水,存在一定程度的水岩作用;③夏县热水井热储温度为63.7~96.0℃,循环深度为0.95~2.4 km,补给高程为1370 m;④氢氧稳定同位素特征、水岩作用特征和循环深度揭示出夏县热水井成因为来自于中条山的大气降水沿断裂入渗,经深循环作用,在地下热储层加热并通过中条山断裂富集形成热水。研究结果可为夏县地下热水补给循环过程与地震监测研究提供了科学依据。Through analyzing the test data of hydrogen and oxygen isotope and SiO 2 temperature scale of hot water well in Xiaxian County,Shanxi Province,the characteristics of stable hydrogen and oxygen isotopes,the groundwater recharge source and the depth of circulation are studied.The results show that:①δ18O ranges from−10.10‰to−9.47‰,andδD ranges from−72.75‰to−71.32‰in Xiaxian hot water well.②Stable hydrogen and oxygen isotopes in hot water wells in Xiaxian County are located near the atmospheric precipitation line,but shift to the right of it,showing that the recharge source of hot water well in Xiaxian County is mainly atmospheric precipitation,and there is a certain degree of water-rock interaction.③The reservoir temperature of Xiaxian hot water well is 63.7~96.0℃,the circulation depth is 0.95~2.4 km,and the recharge elevation is 1370 m.④The characteristics of stable hydrogen and oxygen isotopes,the characteristics of water-rock interaction and the depth of circulation reveal that the hot water well in Xiaxian County is caused by the infiltration of atmospheric precipitation from Zhongtiaoshan Mountain along the fault.Through deep circulation,it is heated in the underground thermal reservoir and enriched through the Zhongtiaoshan fault to form hot water.The results provide a scientific basis for the hot groundwater recharge cycle and seismic monitoring in Xiaxian County.

关 键 词：氢氧稳定同位素 夏县热水井 补给来源 热水成因 地震 

分 类 号：P315.72[天文地球—地震学]