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Palaeo-ecology of the OAE 2 (Cenomanian-Turonian) and OAE 3 (Coniacian-Santonian) at Tarfaya, NW Africa, as reflected by marine palynology.

非洲西北部塔尔法亚 OAE 2（塞诺曼阶-土伦阶）和 OAE 3（科尼亚阶-桑托阶）的古生态，通过海洋孢粉学反映。

基本信息

批准号：
160363422
负责人：
Professor Dr. Helmut Keupp
金额：
--
依托单位：
Fachrichtung Paläontologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/160363422?language=en
关键词：
Palaeo ecology OAE Cenomanian Turonian

项目摘要

Critical stratigraphic units provided by 5 core sections from the Upper Cretaceous of Tarfaya, NW Africa, are to be analysed palynologically, with emphasis on organic-walled algae cysts (dinoflagellate cysts, prasinophytes, acritarchs). Core S 75 covers the Cenomanian/Turonian boundary Event proper (CTBE, Oceanic Anoxic Event 2) up into the Lower Turonian. Four new cores from the multidisciplinary project Atlantic Margin Integrated Basin Analysis, Morocco , available in late 2009, are to recover the OAE 2 (Cenomanian/Turonian) up to the OAE 3 (Coniacian/Santonian). The response of the various algal groups and palynologic proxies to the dynamic of the OAE 2 and OAE 3 respectively are to be considered and compared with independent palaeo-environmental proxies. A main focus will be on the response of prasinophyte green algae to potential oxygen deficiency in photic zone waters (biomarker). Special attention will be given to the comparison of palaeo-ecologic boundary conditions of the two events. This approach is provided by the integration of palynologic data with multidisciplinary data sets including micropalaeontology, geochemistry and sedimentology, which are available for core S 75 already and will be available from the multidisciplinary project for the new cores. The comparison of the palynologic results with independent proxy data will greatly enhance the knowledge on both, the palaeo-ecological potential of marine palynology as well as thedynamic of OAE origin and evolution.

本文将对西北非洲Tarfaya上白垩纪的5个岩心剖面提供的关键地层单位进行孢粉学分析，重点分析有机壁藻类囊（鞭毛藻囊、裸生藻、针叶藻）。岩芯s75覆盖了Cenomanian/Turonian边界事件（CTBE, Oceanic Anoxic Event 2）至下Turonian。来自摩洛哥大西洋边缘综合盆地分析多学科项目的四个新岩心将于2009年底投入使用，用于恢复OAE 2 （Cenomanian/Turonian）至OAE 3 （Coniacian/Santonian）。考虑不同藻类群和孢粉指标对OAE 2和OAE 3动态的响应，并与独立的古环境指标进行比较。一个主要的焦点将是在光区水域（生物标志物）潜在的氧缺乏，prasinophyte绿藻的反应。将特别注意两个事件的古生态边界条件的比较。这种方法是通过将孢粉学数据与包括微古生物学、地球化学和沉积学在内的多学科数据集结合起来提供的，这些数据集已经用于S 75岩心，将从多学科项目中用于新岩心。将孢粉学结果与独立的代用资料进行比较，将极大地提高对海洋孢粉学古生态潜力以及OAE起源和演化动态的认识。