华南埃迪卡拉纪陡山沱盆地氧化界面的迁移与碳同位素异常

被引:20
作者
蒋干清 [1 ]
张世红 [2 ,3 ]
史晓颖 [2 ,3 ]
王新强 [1 ,2 ]
机构
[1] Department of Geoscience,University of
关键词
埃迪卡拉纪; 同位素; 氧化界面; 早期动物; 陡山沱组; 华南;
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
华南埃迪卡拉纪陡山沱组的稳定同位素分析显示,从陆架到盆地不同剖面之间的同位素存在明显差异.贵州松林剖面代表了台内盆地沉积,其δ13C值在整个陡山沱组都明显偏负(-3‰~-5‰,VPDB).位于斜坡相的五河剖面也有类似特征(-5‰~-10‰,VPDB).而在瓮安和朵丁两个台地相剖面,陡山沱组的δ13C值大致显示出两个负异常,但叠加了明显的米级变化,而且其δ13C绝对值与华南三峡地区及全球其他地区同时代地层明显不同.这种不同剖面之间的同位素差异,如果在某种程度上代表了古代海水的地球化学特征,则可能记录了陡山沱盆地氧化界面在空间和时间上的不稳定性.综合华南与全球其他埃迪卡拉系地层δ13C数据的分析表明,陡山沱盆地的δ13C变化总体上和埃迪卡拉海洋巨大的溶解有机碳储库的存在和氧化是一致的,但区域环境对新元古代同位素变化也有明显的控制作用.因此,利用δ13C异常作为时间界面进行地层对比需要更加谨慎.
引用
收藏
页码:1481 / 1495
页数:15
相关论文
共 13 条
[1]   甲烷渗漏构造、水合物分解释放与新元古代冰后期盖帽碳酸盐岩 [J].
蒋干清 ;
不详 ;
史晓颖 ;
不详 ;
张世红 ;
不详 .
科学通报 , 2006, (10) :1121-1138
[2]   蓟县元古界碳酸盐岩的碳同位素变化 [J].
储雪蕾 ;
张同钢 ;
张启锐 ;
冯连君 ;
张福松 .
中国科学(D辑:地球科学), 2003, (10) :951-959
[3]   The age of the Nantuo Formation and Nantuo glaciation in South China [J].
Zhang, Shihong ;
Jiang, Ganqing ;
Han, Yigui .
TERRA NOVA, 2008, 20 (04) :289-294
[4]  
Carbon isotope variation through the Neoproterozoic Doushantuo and Dengying Formations, South China: Implications for chemostratigraphy and paleoenvironmental change[J] . Hong-Fei Ling,Hong-Zhen Feng,Jia-Yong Pan,Shao-Yong Jiang,Yong-Quan Chen,Xi Chen.Palaeogeography, Palaeoclimatology, Palaeoecology . 2007 (1)
[5]  
Integrated Ediacaran (Sinian) chronostratigraphy of South China[J] . Maoyan Zhu,Junming Zhang,Aihua Yang.Palaeogeography, Palaeoclimatology, Palaeoecology . 2007 (1)
[6]  
Carbon isotope variability across the Ediacaran Yangtze platform in South China: Implications for a large surface-to-deep ocean δ 13 C gradient[J] . Ganqing Jiang,Alan J. Kaufman,Nicholas Christie-Blick,Shihong Zhang,Huaichun Wu.Earth and Planetary Science Letters . 2007 (1)
[7]  
The diversification and extinction of Doushantuo‐Pertatataka acritarchs in South China: causes and biostratigraphic significance[J] . ZhouChuanming,XieGuwei,KathleenMcFadden,XiaoShuhai,YuanXunlai.Geol. J. . 2007 (3‐4)
[8]  
Stable isotope record of the terminal Neoproterozoic Krol platform in the Lesser Himalayas of northern India[J] . Alan J. Kaufman,Ganqing Jiang,Nicholas Christie-Blick,Dhiraj M. Banerjee,Vibhuti Rai.Precambrian Research . 2006 (1)
[9]  
Evolution of C isotopes in the Cambrian of China: implications for Cambrian subdivision and trilobite mass extinctions[J] . Mao-Yan Zhu,Jun-Ming Zhang,Guo-Xiang Li,Ai-Hua Yang.Géobios . 2004 (2)
[10]  
Carbonate platform growth and cyclicity at a terminal Proterozoic passive margin, Infra Krol Formation and Krol Group, Lesser Himalaya, India[J] . GanqingJiang,NicholasChristie‐Blick,Alan J.Kaufman,Dhiraj M.Banerjee,VibhutiRai.Sedimentology . 2003 (5)