| 郯庐断裂带温泉气体地球化学 |
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| 引用本文： | 刘德良,陶士振,张朝明.郯庐断裂带温泉气体地球化学[J].高校地质学报,2001,7(1):81-86. |
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| 作者姓名： | 刘德良 陶士振 张朝明 |
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| 作者单位： | 1. 中国科学技术大学地球和空间科学系，安徽合肥 230026; 2. 中国石油勘探开发研究院，北京100083; 3. 安徽省地震局，安徽 合肥 230011 |
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| 基金项目： | 国家计委“九五”攻关项目! (96 110 0 1 0 6 0 7)成果之一 |
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| 摘 要： | 断裂构造带温气体成分及同位素组成特征直接指示断裂带的构造活动及水化学特征。郯庐断裂带温泉气体成分以N2为主（多数大于90％），CO2含量较低（多数小于1％）。δCco2在南北不同地段存在明显差异，北段为－5．8‰－－7．8‰，CO2主要为岩石化学成因。而中段和南段δ^13Cco2均小于－10‰，CO2有机成因。^40Ar/^36Ar为295－363，其中较低者（300左右）主要来源于大气，较高者来自地壳岩石中^40K的衰变。本文研究成果不仅有助于探讨断裂带不同地段温泉气体的组成及其来源，而且有助于揭示郯庐断裂带构造－岩浆活动及水文地球化学特征。
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| 关 键 词： | 温泉 天然气 地球化学 郯庐断裂带 |
| 文章编号： | 1006-7493(2001)01-081-06 |
| 收稿时间： | 2001-03-20 |
| 修稿时间： | 2000年9月4日 |
Gas Geochemistry of Warm Springs in Tan-Lu Fault Belt |
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| LIU De-liang,TAO Shi-zhen,ZHANG Chao-ming.Gas Geochemistry of Warm Springs in Tan-Lu Fault Belt[J].Geological Journal of China Universities,2001,7(1):81-86. |
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| Authors: | LIU De-liang TAO Shi-zhen ZHANG Chao-ming |
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| Institution: | 1. Department of Earth and Space Sciences, China University of Science and Technology, Hefei 230026; 2. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083; 3. Research Center for Earthquake Forecast, Anhui Earthquake Bureau, Hefei 230031, China |
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| Abstract: | The gas compositions and isotope compositions of warm springs in fault s tructure zones directly indicate structure activity and hydrogeochemical charact e ristics in the fault zones.N2 is the major gas component (90% or so) of warm springs in Tan-Lu fault belt.There is an obvious difference in δ13C CO2 for different sections of the fault zone.The δ13C CO2 values in northern section are -4.3‰～-7.8 ‰,and the CO2 is inorganic in origin,produced by petrochemical evolution of the rocks.The δ13CCO2 values in central an d southern sections are lower than -10‰,and the CO2 is organogenic. 40Ar/36Ar vary fro m 295 to 363,in which the lower ratios stem from atmosphere,and th e higher ratios from the decay of 40K in the rocks of the earth crust.Th is paper not only studies the gas compositions of warm springs in different sections of Tan-Lu fault belt and their origin,but also i s important in revealing the tectono-magmatic activity and hydrogeochemical ch aracteristics of the fault belt. |
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| Keywords: | warm springs natural gas geochemistry Tan Lu fault belt |
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