Cenozoic planktonic foraminifera biostratigraphy from the South Atlantic Transect (International Ocean Discovery Program Expedition 390/393)

南大西洋断面新生代浮游有孔虫生物地层学（国际海洋发现计划远征 390/393）

基本信息

批准号：
NE/X002187/1
负责人：
Bridget Wade
金额：
$ 3万
依托单位：
University College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2022
资助国家：
英国
起止时间：
2022 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FX002187%2F1
关键词：
Cenozoic planktonic foraminifera biostratigraphy South

项目摘要

Planktonic foraminifera are microscopic, single celled organisms which live in great abundance throughout the world oceans, being important part of the microplankton fauna. They make up their shells from calcium carbonate, which they obtain form the surrounding sea water. Evolution and extinction events of fossil planktonic foraminifera are extensively studied and used to assess the age of the deep-sea sediments and to correlate sedimentary rock units when building reservoir models for oil and gas exploration. Analysis of chemical composition of planktonic foraminifera shells, also provide scientists with paleoenvironmental information, which tells us about the past environments and help us to understand the nature of ancient climatic conditions on our planet.This particular study however, focuses predominantly on biostratigraphic analysis of the sedimentary cores, which will be recovered during the IODP Expedition 390/393 South Atlantic Transect. Shipboard biostratigraphy will allow us to date each sample and produce preliminary age-depth model for all drilled sites, which is a basis for any palaeoceanographic research. Additional observations of planktonic foraminifera abundances, assemblage composition and state of test preservation, will allow to assess the research potential of the collected sample material. This will aid other scientists working on these sedimentary cores, to plan their research projects more effectively, in accordance with the expected sample material quality. Post cruise study will focus on more detailed investigation of evolutionary events of stratigraphically important taxa. This will provide new age calibrations from the subtropical real, allowing to produce more robust age models in future palaeoceanographic studies.

浮游有孔虫是微小的单细胞生物，大量生活在世界各地的海洋中，是微型浮游生物群的重要组成部分。它们用从周围海水中获取的碳酸钙制成贝壳。浮游有孔虫化石的演化和灭绝事件被广泛研究，并用于评估深海沉积物的年龄，并在建立石油和天然气勘探的储层模型时关联沉积岩单元。对浮游有孔虫贝壳的化学成分进行分析，还为科学家提供了古环境信息，这些信息告诉我们过去的环境，并帮助我们了解地球上古代气候条件的本质。然而，这项特殊的研究主要集中于生物地层学分析沉积岩芯，将在 IODP 远征 390/393 南大西洋断面期间回收。船上生物地层学将使我们能够确定每个样本的年代，并为所有钻探地点生成初步的年龄深度模型，这是任何古海洋学研究的基础。对浮游有孔虫丰度、组合组成和测试保存状态的额外观察将有助于评估所收集样本材料的研究潜力。这将帮助其他研究这些沉积岩芯的科学家根据预期的样本材料质量更有效地规划他们的研究项目。巡航后研究将侧重于对地层重要类群的进化事件进行更详细的调查。这将为亚热带真实年龄提供新的年龄校准，从而在未来的古海洋学研究中产生更稳健的年龄模型。