Searching for biological fingerprints and grain alteration patterns in Devonian and Carboniferous microbial facies - examples from the Bohemian Massif

在泥盆纪和石炭纪微生物相中寻找生物指纹和颗粒蚀变模式 - 来自波希米亚地块的例子

• 批准号: 431867332
• 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
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/431867332?language=en
• 关键词: Searching; biological; fingerprints; grain; alteration

In this project we will investigate putative microbialite facies associated with one of the most severe extinction evens of the Phanerozoic, the Late Devonian Kellwasser and Hangenberg events, and on the to preceding Middle Devonian Basal Choteč and Kačák events. We intend to focus on internal arrangement and fabric of micritic precipitates in order to assess the role of taphonomy in the formation and preservation of recorded microstructures, and to decipher modes and patterns in grain alteration and peloid formation within the mentioned stratigraphic levels. We further aim to test whether extinctions at the end of Devonian influenced the structure of microbial biota. To document and compare the range of morphologies at ultrastructural level using SEM and to assess spatial and textural relations of carbonate precipitates is essential in our investigation but in addition to that, REE+Y analysis will be carried out as it has proved to represent promising additional fingerprint of microbial involvement in carbonate precipitation.

在这个项目中，我们将研究与显生宙最严重灭绝事件之一，晚泥盆世Kellwasser和Hangenberg事件，以及之前的中泥盆世基底chotenik和Kačák事件相关的假定微生物岩相。我们将重点研究泥晶沉淀物的内部排列和结构，以评估埋藏学在记录的微观结构的形成和保存中的作用，并破译上述地层水平内颗粒蚀变和球似体形成的模式和模式。我们进一步的目的是测试泥盆纪末期的灭绝是否影响了微生物群的结构。在我们的研究中，利用扫描电镜记录和比较超微结构水平上的形态范围，并评估碳酸盐沉淀的空间和结构关系是必不可少的，但除此之外，REE+Y分析将被进行，因为它已被证明代表了微生物参与碳酸盐沉淀的有希望的额外指纹。