摘要
本文在分析横径温泉区4个气样的气体组分、氦同位素以及CO2和CH4的碳同位素基础上,结合温泉区地质条件,研究了该区碳酸温泉中CO2的成因。研究结果表明:横径温泉区温泉气中CO2的含量很高(>96%),CO2气体中1δ3C较重(-5.53‰^-4.43‰),属于与深大断裂活动有关的深部幔源无机成因气;温泉气中CH4的含量很低(<1.86%),CH4气体中1δ3C较轻(-27.69‰^-59.31‰),其中39、和11号温泉气体中的CH4属于深部幔源无机CH4和源于地表生物成因CH4的混合,而2号温泉气体中的CH4属于深部幔源无机CH4。
On the basis of the analysis of the geological conditions and the gas composition, helium isotopic composition, and carbon isotopic abundance of carbon dioxide and methane for 4 gas samples taken from the Hengjing hot springs area, the CO2 genesis of carbonated hot springs is examined. The CO2 concentrations of geothermal gases is higher than 96%, and the δ^13 C values of CO2 range from - 5.53‰ to - 4.43‰, indicating that the CO2 is resulted from the inorganic mantle source gas related to the deep-reaching active faults. The CH4 concentrations of geothermal gases is less than 1.86%, and the δ^13C values of CH4 range from -27.96‰ to -59.31‰, indicating that the CH4 of No.3, No.9 and No. 11 geothermal gas samples is resulted from a mixture of the deep inorganic mantle source CH4 and surface biogenetic CH4, but the CH4 of No. 2 geothermal gas is resulted from the deep inorganic mantle source CH4.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2005年第6期6-9,共4页
Hydrogeology & Engineering Geology
基金
国家自然科学基金资助项目(40472147)
关键词
碳酸温泉
CO2成因
碳同位素
氦同位素
carbonated hot spring
C02 genesis
carbon isotopes
helium isotopes
作者简介
张卫民（1965-）,男,教授,博士,主要从事水文地球化学与环境工程等方面的教学和科研工作. E-mail：wmzhang@ecit.edu.cn
