摘要
为分析天津山岭子地热田地热流体化学成因、赋存条件及物质来源,笔者通过采集地热流体样品和测试分析,对天津山岭子地热田蓟县系雾迷山组地热流体同位素特征进行了研究,总结了天津山岭子地热田蓟县系雾迷山组地热流体起源与形成机理。结果表明:研究区蓟县系雾迷山组地热流体^(87)Sr/^(86)Sr范围为0.7113~0.7118,指示碳酸盐岩溶解成因,表现出明显的时间累积效应;蓟县系雾迷山组热储流体的^(40)Ar/^(36)Ar范围为301~412,远小于幔源^(40)Ar/^(36)Ar,可排除其幔源物质成因。δ^(34)S范围为34.1‰~34.6‰,气体组分含量以氮气和甲烷为主,指示其还原环境。本文研究结果对山岭子地热田地热资源的开发利用具有借鉴参考意义。
In order to analyze the chemical origin,occurrence conditions and material sources of geothermal fluids in the Shanlingzi geothermal field in Tianjin,the isotopic characteristics of the geothermal fluids in the Wumishan Formation of the Jixian system in the Shanlingzi geothermal field in Tianjin were studied by collecting and testing geothermal fluid samples,and the origin and formation mechanism of the geothermal fluids in the Wumishan Formation were summarized.The results show that the ^(87)Sr/^(86)Sr range of geothermal fluid in Wumishan Formation of Jixian system in the study area is 0.7113~0.7118,indicating the origin of carbonate karst decomposition and showing obvious time accumulation effect.The ^(40)Ar/^(36)Ar range of Wumishan Formation geothermal reservior fluid in Jixian system is 301~412,which is much smaller than the mantle source ^(40)Ar/^(36)Ar,which can exclude the mantle source material origin.Theδ^(34)S range is 34.1‰~34.6‰,and the gas components are mainly nitrogen and methane,indicating the reduction environment.The research results have certain reference significance for the development and utilization of geothermal resources in Shanlingzi geothermal field.
作者
岳冬冬
贾小丰
张秋霞
冯昭龙
李胜涛
YUE Dongdong;JIA Xiaofeng;ZHANG Qiuxia;FENG Zhaolong;LI Shengtao(Center of Hydrogeology and Environmental Geology,China Geological Survey,Baoding 071051,China;Technical Innovation Center for Geothermal and Dry Hot Rock Exploration and Development,Ministry of Natural Resources,Baoding 071000,China;Key Laboratory of Groundwater Resources and Environment,Ministry of Education,Jilin University,Changchun 130021,China)
出处
《华北地质》
2023年第2期45-50,共6页
North China Geology
基金
中国地质调查局项目“东部地区干热岩资源调查评价(DD20221680)”
“天津东丽区—河北牛驼镇地热资源调查与试验(DD20190127)”。
关键词
山岭子地热田
蓟县系雾迷山组
环境同位素
稀有气体
Shanlingzi geothermal field
Wumishan Formation of Jixian system
environmental isotope
noble gas
