藏南海相白垩纪碳酸盐碳稳定同位素演化与古海洋溶解氧事件

被引:11
作者
胡修棉
王成善
李祥辉
机构
[1] 成都理工学院沉积地质研究所,成都理工学院沉积地质研究所,成都理工学院沉积地质研究所成都,成都,成都
基金
国家杰出青年科学基金;
关键词
碳稳定同位素; 古海洋事件; 溶解氧; 白垩纪 ; 西藏南部;
D O I
暂无
中图分类号
P597 [同位素地质学与地质年代学];
学科分类号
摘要
系统测量藏南白垩纪海相碳酸盐样品的碳稳定同位素,建立了该区白垩纪碳稳定同位素演化曲线.在与欧洲同期碳酸盐岩对比基础上,发现白垩纪三次正向偏移和两次负向偏移具有良好的全球相关性.Albian-Cenomanian界线、Cenomanian-Turonian界线和Turonian-Coniacian界线δ13C正向偏移与该时期的全球大洋缺氧事件相关;Turonian中期δ13C负向偏移则是全球缺氧事件造成大规模有机碳埋藏,从而引起温室效应减弱而Santonian早期负向偏移对应于富氧事件的发生.
引用
收藏
页码:51 / 58
页数:8
相关论文
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