High-resolution carbon isotope records of the Aptian to Lower Albian from SE France and the Mazagan Plateau (DSDP Site 545):: a stratigraphic tool for paleoceanographic and paleobiologic reconstruction
High-resolution carbon isotope records of the Aptian to Lower Albian from SE France and the Mazagan Plateau (DSDP Site 545):: a stratigraphic tool for paleoceanographic and paleobiologic reconstruction
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DOI：
10.1016/s0012-821x(03)00646-0
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发表时间：
2004-01-30
影响因子：
5.3
通讯作者：
Hemleben, C
中科院分区：
文献类型：
--
作者：
Herrle, JO;Kössler, P;Hemleben, C
高分辨率的碳同位素地层学是建立在Vocontian盆地（法国东南部）的Aptian到Lower Albian，并与Mazagan高原（DSDP Site 545）的碳同位素记录进行对比。Vocontian盆地的碳同位素地层学被提议作为标准参考曲线的Aptian到下Albian，由于地层序列的完整性和高时间分辨率，良好的生物地层时间控制，以及频繁出现的区域性到全球性的黑色页岩层位，包括下Aptian的OAE 1a（OAE 1a）和下Albian的OAE 1b。碳同位素记录似乎更适合于不同的海洋和陆地环境的长距离短期对比比生物地层学，因为在一系列沉积物类型的碳同位素信号的同步性。然而，生物地层学和碳同位素地层学的结合提供了一个有效的工具，以重建生物变化和古海洋学，并在不同的海洋环境中，区域性的全球黑色页岩层位。这种结合的方法使我们能够确定生物地层标志种首次和最后出现的同步性或历时性。基于已证明的Aptian/Albian边界重要生物地层标志物的穿时性，全球观察到的最高Aptian正碳同位素偏移结束和VC值明显负移开始之间的断点是另一种标准。碳同位素记录的独特结构和振幅在无机碳和有机碳中都可以观察到，因此可以在阿普第阶到下阿尔布阶的所有海洋和陆地环境中识别。(C)2003 Elsevier B. V.保留所有权利。
High-resolution carbon isotope stratigraphy is established for the Aptian to Lower Albian of the Vocontian Basin (SE France), and correlated to the carbon isotope record of the Mazagan Plateau (DSDP Site 545). The carbon isotope stratigraphy of the Vocontian Basin is proposed as a standard reference curve for the Aptian to Lower Albian, due to the completeness and high temporal resolution of the stratigraphic succession, the good biostratigraphical time control, and the frequent occurrence of regional to global black shale horizons including Oceanic Anoxic Events 1a (OAE 1a) of the Lower Aptian and OAE 1b of the Lower Albian. The carbon isotope record appears better suited for long-distance short-term correlation of different marine and terrestrial environments than biostratigraphy because of the synchroneity of carbon isotope signals in a range of sediment types. However, the combination of both biostratigraphy and carbon isotope stratigraphy provides an effective tool to reconstruct biotic change and paleoceanography, and to correlate regional to global black shale horizons in different marine environments. This combined approach allows us to ascertain the synchroneities or diachroneities of first and last appearances of biostratigraphic marker species. Based on the demonstrated diachroneity of important biostratigraphic markers of the Aptian/Albian boundary, the globally observed break point between the end of the uppermost Aptian positive carbon isotope excursion and the onset of the pronounced negative shift of VC values, is an alternative criterion. The distinctive structure and amplitudes of the carbon isotope record are observed in both the inorganic and organic carbon and can therefore be recognized in all marine and terrestrial environments of the Aptian to Lower Albian. (C) 2003 Elsevier B.V. All rights reserved.