The Silurian ''Mulde Event'' on the shelf of the East European Craton: chronology of events and causal relationships

东欧克拉通陆架上的志留纪“穆尔德事件”：事件年表和因果关系

基本信息

批准号：
216246865
负责人：
Professor Dr. Axel Munnecke
金额：
--
依托单位：
Forschungsschwerpunkt Paläontologie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/216246865?language=en
关键词：
Silurian Mulde Event shelf East

项目摘要

The Mulde Event (Wenlock, Silurian) was a major perturbation in the global climate, carbon cycle, and ocean state. The associated extinction affected ca. 95% of graptolite species (the so-called “Große Krise”; Jäger, 1991), and the globally-recorded sea-level change was among the most abrupt in Earth history. This project aims to elucidate the chronology of associated events through a sedimentary basin analysis of the shelf of the East European Craton, using subsurface and outcrop data from Poland and Ukraine. A sequence stratigraphical framework will be developed based on microfacies, paleontological, and geochemical analyses, which will include 13C development and spectral gamma ray logs. Changes in marine ecosystems will be tracked for graptolites and conodonts, which will also provide chronostratigraphic control. The aims of the project are: 1) to provide facies-independent, basin-scale reconstruction of the extinction and subsequent carbon isotope excursion with precise biostratigraphic control in order to establish accurate timing and explain causal relationships between these events and sea-level change; and 2) to identify (?glacial) climate conditions in the low-latitude sedimentary record using the Mulde Event as a case study. The project will allow many of the existing models of the driving mechanisms of carbon isotope development that have been proposed for the Lower Palaeozoic to be tested, and as a result, it will provide significant insight into palaeoclimate and oceanic circulation at this time in Earth’s history.

穆尔德事件（文洛克，志留纪）是全球气候、碳循环和海洋状态的重大扰动，相关灭绝影响了约 95% 的笔石物种（所谓的“Große Krise”；Jäger，1991），全球记录的海平面变化是地球历史上最突然的变化之一，该项目旨在通过陆架沉积盆地分析来阐明相关事件的年代。将利用来自波兰和乌克兰的地下和露头数据开发东欧克拉通的地层框架，该框架将基于微相、古生物学和地球化学分析，其中包括 13C 发展和光谱伽马射线测井。追踪笔石和牙形刺，这也将提供年代地层控制。该项目的目标是：1）提供。通过精确的生物地层控制对灭绝和随后的碳同位素偏移进行与相无关的盆地尺度重建，以便确定准确的时间并解释这些事件与海平面变化之间的因果关系；2）识别（冰川）气候条件；以穆尔德事件为案例研究的低纬度沉积记录中，该项目将测试许多为下古生界提出的碳同位素发育驱动机制的现有模型。因此，它将为地球历史上此时的古气候和海洋环流提供重要的见解。