Sedimentary Environments and Biodiversity of Ichnofaunas at the pC/C-Boundary of the Yangtze Platform: Palaoecologic and Biostratigraphic Significance

扬子地台中碳界线沉积环境与动物多样性：古生态与生物地层意义

• 批准号: 5337304
• 负责人: Professor Dr. Christoph Heubeck
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5337304?language=en
• 关键词: Sedimentary; Environments; Biodiversity; Ichnofaunas; pC

This proposal outlines sedimentologic-stratigraphic and palaeobiological aspects of the pC/C boundary interval of the Yantze Platform. Paleoecologic interpretations of the depositional realm and its trace fossil assemblage will be placed in a biostratigraphic context, thus adding to the understanding of this critical time interval in earth history. A modern sedimentological re-evaluation and interpretation of select key sections regarding sequence- and event-stratigrahic attributes will identify the dominant sedimentary environments and provide critical palaeoenvironmental parameters. The first appearances of certain ichnotaxa, and the composition and distribution of typical ichnoassemblages reflect evolutionary stages in the metazoan evolution (behavior, life styles and strategies, inter- and intraspecific relations etc.), and therefore supply data on the metazoan evolution in otherwise unfossilifeous sediments. Several ichnotaxa have recently been used with various succes as index fossils for pC/C boundary zonation and global correlation. The unique situation of a co-occurrence of true biostratigraphy markers (such as acritarchs, small shelly fossils and early trilobites) and well-preserved ichnofaunas in many sections of the Yangtze platform sediments allows, for the first time, the calibration of the true biostratigraphic significance of certain ichnotaxa occuring across the pC/C boundary.

该提案概述了Yantze平台的PC/C边界间隔的沉积学 - 地层学和古生物学方面。对沉积领域及其痕量化石组合的古生物学解释将放置在生物地层的环境中，从而增加了对地球历史上此关键时间间隔的理解。关于序列和事件 - 地层属性的精选关键部分的现代沉积学重新评估和解释将确定主要的沉积环境，并提供关键的古环境参数。某些鱼类的首次出现，以及典型的鱼类组合的组成和分布反映了后生动物进化中的进化阶段（行为，生活方式和策略，间和内部关系之间和种内关系等），因此在原本不掩盖的沉积物中提供了有关后生动物进化的数据。最近已将几种红霉素与各种成功用作PC/C边界分区和全局相关性的指数化石。真正生物地层学标记（例如Acritarch，小的雪莉化石和早期三叶虫）以及保存完好的Yangtze平台沉积物中的真实情况的独特情况，可以首次允许对某些生物术语的校准，这是第一次的校准。