马鞍坪温泉气体成因地球化学研究  

Gas Geochemistry of the Maanping Hotspring, Jiangxi Province

作　　者：孙文洁[1] 高柏[1] 孙占学[1] 张文[1] 

机构地区：[1]东华理工学院,江西抚州344000

出　　处：《东华理工学院学报》2004年第4期341-344,共4页Journal of East China Institute of Technology

基　　金：国家自然科学基金资助项目(40 2 4 2 0 1 8)

摘　　要：从赣中马鞍坪地区采集了 11个水样分析了温泉及冷泉的氢、氧同位素组成 ,得出温泉水起源于大气降水补给。在此基础上 ,对 4个温泉采集了气样 ,测定了气体组成的含量和氦同位素组成 ,以及二氧化碳的碳同位素 ,结果表明 :马鞍坪地区地热气体为二氧化碳型 ,温泉气的二氧化碳含量很高 ,占总体积的 97%以上 ,二氧化碳气体的δ1 3C值变化于 -4 18‰～ -7 0‰ ,平均为 -5 .63‰ ,为变质无机成因和幔源无机成因的混合物 ;其3He/4He比值变化于 (1.72± 0 .15 )×10 7～ (2 .5 5± 0 .19)× 10 - 7之间 ,R/Ra值均小于 1。In the Maanping hot springs area, central Jiangxi Province, 11 samples taken from hot springs and cold springs are analyzed for the isotopic composition of hydrogen and oxygen. Evidences show that the geothermal waters in the area are of meteoric origin. Gas chemistry, helium isotopic composition, and carbon isotopic abundance of carbon dioxide for 4 gas samples from hot springs are measured. The hot spring gases in the area are categorized into the mantle CO_2 type gases. The CO_2 concentrations of the geothermal gases is higher than 97%, and the (δ^(13)C) values of CO_2 range from -4.18‰ to -7.0‰ indicate that the CO_2 are the mixture of metamorphic-origin carbon dioxide with mantle derived carbon dioxide. The helium isotopic ratios ~3He/~4He for the hot spring gases being less than Ra indicate that the helium come from the crust.

关 键 词：温泉 地球化学研究 无机成因 氧同位素 氦同位素 碳同位素 Δ^13C 二氧化碳含量 水样分析 气体组成 

分 类 号：N03[自然科学总论—科学技术哲学] P314.1[天文地球—固体地球物理学]