Transatlantic d13C correlation and establishment of New-World reference curves for the potential d13C definition of stage/substage boundaries in the Turonian and Coniacian (Upper Cretaceous).

跨大西洋 d13C 相关性和新世界参考曲线的建立，用于土伦阶和科尼亚阶（上白垩统）阶段/亚阶段边界的潜在 d13C 定义。

• 批准号: 26846977
• 负责人: Privatdozent Dr. Frank Wiese
• 金额: --
• 依托单位: Abteilung Geobiologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/26846977?language=en
• 关键词: Transatlantic; d13C; correlation; establishment; New

The high-resolution correlation potential of d13C bulk-rock curves for intercontinental correlation is not yet exploited for Turonian to Coniacian (Upper Cretaceous) rocks. Although the well established d13C correlation framework of Europe exhibit curves with a vivid course with significant peaks, spikes or plateaus with an excellent value for stratigraphy, most high resolution correlations are restricted to basins within Europe in the interval considered. Therefore, this project ¿ for the first time ¿ aims at the establishment of a d13C correlation network between Brazil, Mexico and Europe. By this, biostratigraphic correlation inaccuracies caused by selective sampling, biogeography or facies dependency of index-taxa can easily be overcome, which aids calibration of any biozonations. The verification of two significant d13C marker in the Middle/Upper Turonian boundary interval and at the Turonian/Coniacian boundary is expected. This proof will justify the definition of the Middle/Upper-Turonian boundary by a wide-spread positive spike (Pewsey Event). The Lengerich section (Germany) is considered as a potential GSSP. In context with the Turonian/Coniacian boundary formalization (proposed GSSP Salzgitter-Salder, Germany), a negative peak at the boundary needs urgently to be considered as an additional/alternative chronostratigraphic boundary marker.

d13 C块体岩石曲线的高分辨率对比潜力尚未开发的洲际对比土伦至Coniacian（上白垩统）的岩石。虽然欧洲成熟的d13 C对比框架显示出具有明显的峰值、尖峰或高原的生动过程的曲线，具有极好的地层价值，但大多数高分辨率对比仅限于所考虑区间内的欧洲盆地。因此，该项目首次旨在建立巴西，墨西哥和欧洲之间的d13 C相关网络。通过这种方法，可以很容易地克服由选择性取样、地理学或指数分类单元的相依赖性引起的生物地层对比的不准确性，这有助于任何生物分区的校准。预计将在中/上Turonian边界层和Turonian/Coniacian边界验证两个重要的d13 C标记。这个证明将证明中/上土仑边界的定义是由一个广泛分布的正尖峰（Pewsey事件）。Lengerich段（德国）被视为潜在的GSSP。在Turonian/Coniacian边界正式化（GSSP Salzgitter-Salder，德国）的背景下，迫切需要考虑将边界处的负峰作为额外/替代的年代地层边界标志。