Paleoceanographic significance of high-resolution carbon isotope records across the Cenomanian-Turonian boundary in the Western Interior and New Jersey coastal plain, USA

被引:68
作者
Bowman, AR
Bralower, TJ [1 ]
机构
[1] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA
[2] Univ Nebraska, Dept Geosci, Lincoln, NE 68508 USA
基金
美国国家科学基金会;
关键词
ocean anoxic events; OAE2; 13-C; Cenomanian Turonian boundary; Western Interior Seaway;
D O I
10.1016/j.margeo.2005.02.010
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Carbon isotope measurements have been made on bulk carbonate and organic matter in three sections across the Cenomanian-Turonian boundary. The stratigraphy records the positive carbon isotopic excursion that is associated with the major oceanic anoxic event (OAE2). Comparison of TOC and isotopic data in sections from a range of different environments suggests that the positive excursion is a response to increased burial of organic matter in the deep ocean. The lack of coupled negative shifts in delta C-13(org) and delta C-13(carb) records at the onset of OAE2 does not support a causal role for volcanism or methane hydrate dissociation. (c) 2005 Elsevier B.V All rights reserved.
引用
收藏
页码:305 / 321
页数:17
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