| Fluid Composititon and Carbon ＆ Oxygen Isotope Geochemistry of Cenozoic Alkali Basalts in Eastern China |
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| 引用本文： | 张铭杰,王先彬,等.Fluid Composititon and Carbon ＆ Oxygen Isotope Geochemistry of Cenozoic Alkali Basalts in Eastern China[J].中国地球化学学报,1999,18(3):276-282. |
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| 作者姓名： | 张铭杰 王先彬 |
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| 作者单位： | [1]LanzhouInstituteofeology,ChineseAcademyofSciences,Lanzhou730000,China [2]LanzhouInstituteofeology,Chines |
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| 摘 要： | The fluid compositions of Cenozoic alkali basalts in eastern China have been determined by the pyrolysis-MS method,meanwhile the carbon and oxygen isotopic compositions of CO2 released from these samples at different heating temperatures have been analyzed by the vacuum step-heating method.The data show the volatiole heterogeneity in upper-mantle sources and different evolution trends of alkali basaltic magmas in eastern China,and these alkali basaltic magmas may be generated in the oxidizing milieu,as compared with mantle-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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| 关 键 词： | 流体成分 氧同位素 碳同位素 碱性玄武岩 华东地区 同位素地球化学 新生代 |
Fluid composition and carbon & oxygen isotope geochemistry of Cenozoic alkali basalts in eastern China |
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| Zhang Mingjie,Wang Xianbin,Liu Gang,Wen Qibin,Li Liwu.Fluid composition and carbon & oxygen isotope geochemistry of Cenozoic alkali basalts in eastern China[J].Chinese Journal of Geochemistry,1999,18(3):276-282. |
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| Authors: | Zhang Mingjie Wang Xianbin Liu Gang Wen Qibin Li Liwu |
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| Institution: | (1) Lanzhou Institute of Geology, Chinese Academy of Sciences, 730000 Lanzhou, China;(2) Department of Geology, Lanzhou University, 730000 Lanzhou, China |
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| Abstract: | The fluid compositions of Cenozoic alkali basalts in eastern China have been determined by the pyrolysis-MS method, meanwhile
the carbon and oxygen isotopic compositions of CO2 released from these samples at different heating temperatures have been analyzed by the vacuum step-heating method. The data
show the volatile heterogeneity in upper-mantle sources and different evolution trends of alkali basaltic magmas in eastern
China, and these alkali basaltic magmas may be generated in the oxidizing milieu, as compared with mantle-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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