| 中国东部新生代碱性玄武岩中的流体组成及其碳,氧同位素地球化学特征 |
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| 引用本文： | 张铭杰 王先彬. 中国东部新生代碱性玄武岩中的流体组成及其碳,氧同位素地球化学特征[J]. 地球化学, 1998, 27(5): 452-457 |
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| 作者姓名： | 张铭杰 王先彬 |
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| 作者单位： | 兰州大学地质系!兰州，730000(张铭杰)，中国科学院兰州地质研究所气体地球化学国家重点实验室!兰州730000(王先彬，刘刚，文启彬)，中国科学院兰州地质研究所气体地球化学国家 (李立武) |
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| 摘 要： | 利用热分解质谱法测定了中国东部新生代碱性玄武岩中流体挥发分的组成，并对不同温度段释放出的ＣＯ２气体测定了Ｃ，Ｏ同位素值，流体组成和ＣＯ２的Ｃ，Ｏ同位素值表明中国东部上地幔源区的不均一性，与其中所含幔源岩捕体相比，碱性玄武岩浆发育在相对氧化的环境中，并有外来流体组分的加入。
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| 关 键 词： | 流体组成 氧同位素 碳同位素 碱性玄武岩 玄武岩 |
THE FLUID COMPOSITIONS AND C, O ISOTOPIC GEOCHEMISTRY OF CENOZOIC ALKALI BASALTS IN EASTERN CHINA |
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| Zhang Mingjie, Wang Xianbin, Liu Gang, Wen Qibin, Li Liwu. THE FLUID COMPOSITIONS AND C, O ISOTOPIC GEOCHEMISTRY OF CENOZOIC ALKALI BASALTS IN EASTERN CHINA[J]. Geochimica, 1998, 27(5): 452-457 |
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| Authors: | Zhang Mingjie Wang Xianbin Liu Gang Wen Qibin Li Liwu |
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| Abstract: | The fluid compositions in Cenozoic alkali basalts in eastern China have been determined by pyrolysis-MS method, meanwhile the carbon and oxygen isotopic compositions of CO2 released from these samples at different heating temperatures have been analyzed by vacuum steppedly heating method. The volatile contents and carbon,oxygen isotopic compositions of CO2 in these alkali basalts show the unhomogeneous upper-mantle sources in eastern China, and these alkali basaltic magmas may be generated in the oxidizing mil'ieu, comparing with mantle rock-derived xenoliths in these alkali basalts, and exotic volatile components were mixed into these magmas in the process of their formation and development. |
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| Keywords: | fluid composition O isotope C isotope alkali basalt eastern China |
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