Conodont biostratigraphy, paleoecology & isotope geochemistry applied to models of early paleozoic palegeography, paleoceanography & tectono-eustacy; cenozoic offshore basins, BC

牙形刺生物地层学、古生态学

• 批准号: 46182-2008
• 负责人: Barnes, Christopher
• 金额: $ 2.9万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=390594
• 关键词: Conodont; biostratigraphy; paleoecology; isotope; geochemistry

One long-term objective is to contribute toward the understanding of biological and physical processes operating on the Earth during the Early Paleozoic (550-350 million years), especially the events and controls that led to the profound replacement of the Cambrian Evolutionary Fauna by the Paleozoic Evolutionary Fauna and the early diversification of the latter. The principal approach is to use conodont microfossils through integrated, sequential studies of taxonomy, biostratigraphy, paleoecology, biogeography, and isotope geochemistry, using collections from the principal paleoplates. Many projects are designed to establish faunal changes along environmental gradients (e.g. platform to basin transects) with studies in the Appalachians, Cordillera and Innuitian margins now to be integrated with new ones on intracratonic and foreland basins of the interior craton. These will allow a refined analysis of the bioevents and related stratigraphic, tectonic and sea level events for the Laurentian plate during much of the Early Paleozoic. Projects will be expanded that deal with strontium and oxygen isotopes and Ca/Mg ratios from conodonts; geochemical research is investigating changes in seawater history and testing existing models of paleogeography. Particular consideration is given to exotic terranes as well as the main paleoplates. The research will lead to significant advances in conodont phylogeny, cladistics, biostratigraphy, paleoecology and paleobiogeography and will link the existing large faunal database to paleoceanographic and paleoclimatic models to interpret the nature and changes in the Early Paleozoic biosphere-ocean-climate system. Similar basin studies are underway for the Tofino Basin, offshore BC, and will be expanded to the Queen Charlotte basin, using foraminifera and ichthyolith micropaleontology and isotope geochemistry to understand the complex Cenozoic basin evolution.

一个长期目标是促进对早古生代（5.5 - 3.5亿年）地球上生物和物理过程的理解，特别是导致寒武纪进化动物群被古生代进化动物群深刻取代的事件和控制，以及后者的早期多样化。主要的方法是利用牙形石微体化石，通过分类学、生物地层学、古生态学、古地理学和同位素地球化学的综合、连续的研究，利用来自主要古板块的标本。许多项目的目的是确定动物群沿着环境梯度的变化（例如从台地到盆地的断面），目前正在将阿巴拉契亚山脉、科迪勒拉山脉和因努伊特山脉边缘的研究与克拉通内部的克拉通内盆地和前陆盆地的新研究结合起来。这些将允许在早古生代的大部分时间内对劳伦特板块的生物事件和相关的地层、构造和海平面事件进行精细分析。将扩大处理牙形石的锶和氧同位素以及Ca/Mg比率的项目;地球化学研究正在调查海水历史的变化，并测试现有的古地理模型。特别考虑到外来的古板块以及主要的古板块。该研究将导致牙形石发生学、分支学、生物地层学、古生态学和古生物地理学的重大进展，并将现有的大型动物群数据库与古海洋学和古气候模型联系起来，以解释早古生代生物圈-海洋-气候系统的性质和变化。 目前正在对不列颠哥伦比亚省近海的托菲诺盆地进行类似的盆地研究，并将扩大到夏洛特女王盆地，利用有孔虫和鱼化石微体古生物学和同位素地球化学来了解复杂的新生代盆地演化。