| 四川华蓥二叠-三叠系界线剖面稳定碳同位素变化特征及其生物地球化学循环成因 |
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| 作者单位： | 北京大学地球与空间科学学院，日本大阪市立大学大学院理学研究科地球学科 |
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| 摘 要： | 对四川华蓥楼房湾剖面稳定碳同位素进行的研究表明,该地区二叠-三叠系界线附近碳同位素变化趋势与全球变化基本一致。早三叠世早期ΔB平均值高于晚二叠世晚期,指示海水中磷酸盐浓度的增大和初级生产力的繁盛。从晚二叠世末期开始δ13Ccarb的缓慢降低是由大规模火山作用以及陆地风化作用加强造成的;早三叠世最早期δ13Ccarb和δ13Corg的快速同步降低所代表的全球碳循环变化主要受控于生物集群绝灭的主幕及海平面上升引起的底部缺氧水上涌。总之,二叠-三叠纪之交碳同位素变化是火山作用、海平面变化、海洋和陆地生物集群绝灭以及缺氧水上涌等因素综合作用的结果。
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| 关 键 词： | 稳定碳同位素 二叠-三叠系界线 生物集群灭绝 碳循环 四川华蓥 |
Fluctuations of Stable Carbon Isotopes around the Permian-Triassic Boundary in Huaying of Sichuan,South China:Its Characteristics and Biogeochemical Origin |
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| CUI Ying,LIU Jianbo ,,EZAKI Yoichi School of Earth and Space Sciencess,Peking University,Beijing , Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,Beijing . Fluctuations of Stable Carbon Isotopes around the Permian-Triassic Boundary in Huaying of Sichuan,South China:Its Characteristics and Biogeochemical Origin[J]. Beijing University(Natural Science)Network Version(Advance Copy), 2008, 0(3) |
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| Authors: | CUI Ying LIU Jianbo EZAKI Yoichi School of Earth Space Sciencess Peking University Beijing Key Laboratory of Orogenic Belts Crustal Evolution Ministry of Education Beijing |
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| Affiliation: | CUI Ying1,LIU Jianbo 1,2,EZAKI Yoichi3 1School of Earth and Space Sciencess,Peking University,Beijing 100871, 2Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,Beijing 100871, 3Department of Geosciences,Osaka City University,Osaka 558-8585, |
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| Abstract: | |
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| Keywords: | stable carbon isotope Permian-Triassic boundary mass extinction biogeochemical cycle Huaying Sichuan Province |
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