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.

Turonian与Conian（上白垩纪）岩石尚未探索D13C散装岩体曲线的高分辨率相关潜力。尽管欧洲建立的良好的D13C相关框架露出了生动的曲线，其峰值，峰值或高原具有巨大的峰值，对地层学具有良好的价值，但在考虑的间隔中，大多数高分辨率相关性仅限于欧洲的低音。因此，该项目首次旨在建立巴西，墨西哥和欧洲之间的D13C相关网络。这样，可以很容易地克服由选择性抽样，生物地理学或设施依赖性引起的生物层学相关性不准确性，这可以很容易地克服，这有助于对任何生物分解的校准。预计将在中部/上部的Turonian边界间隔和Turonian/Coniacian边界中对两个显着的D13C标记进行验证。该证明将通过广泛的积极尖峰（Pewsey事件）来证明中/上尿元边界的定义是合理的。 Lengerich部分（德国）被认为是潜在的GSSP。在与Turonian/Coniacian边界形式（拟议的GSSP Salzgitter-Salder，德国）的背景下，迫切需要将边界处的负峰值视为另一种/替代/替代/替代/替代的年度地层学边界标记。