Compound-specific radiocarbon dating - approaching the problems of dating Antarctic sediments

化合物特异性放射性碳测年——解决南极沉积物测年问题

• 批准号: 257051270
• 负责人: Dr. Sonja Berg
• 金额: --
• 依托单位: Institut für Geologie und Mineralogie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/257051270?language=en
• 关键词: Compound; specific; radiocarbon; dating; approaching

With the proposed project we want to continue the research on compound specific radiocarbon analysis (CSRA) on Antarctic sediments, a method which is currently established and expanded at the University of Cologne. Our objectives are to extend the application of CSRA from dating diatom sterols to other biomarkers (e.g., specific fatty acids, alcohols, hopanes, pigments) characteristic for different groups of organisms like algae other than diatoms (e.g., Phaeophyceae), phyto/zooplankton, terrestrial plants and bacteria and to apply our concept of CRSA on other archives and regions of Antarctica. In the proposed project two case studies will be accomplished: the first one will focus on the quantification of reservoir effects in a coastal marine record from South Georgia, the second one will deal with the validation of MIS 3 age of a marine record from East Antarctica. Our aim is to improve radiocarbon-based sediment chronologies and to establish CSRA as a broadly applicable method to obtain high-quality age models.

通过拟议的项目，我们希望继续对南极沉积物进行化合物特定放射性碳分析（CSRA）的研究，该方法目前在科隆大学建立和扩展。我们的目标是将 CSRA 的应用范围从硅藻甾醇的测定扩展到其他生物标志物（例如特定的脂肪酸、醇、藿烷、色素），这些生物标志物是不同生物体的特征，如硅藻以外的藻类（例如褐藻纲）、植物/浮游动物、陆地植物和细菌，并将我们的 CRSA 概念应用于南极洲的其他档案和地区。在拟议的项目中，将完成两个案例研究：第一个案例研究将重点关注南乔治亚州沿海海洋记录中水库效应的量化，第二个案例研究将涉及东南极洲海洋记录的 MIS 3 年龄验证。我们的目标是改进基于放射性碳的沉积物年代学，并将 CSRA 建立为一种广泛适用的方法来获得高质量的年龄模型。

项目成果

Was South Georgia covered by an ice cap during the Last Glacial Maximum?

末次盛冰期期间，南乔治亚岛是否被冰盖覆盖？

• DOI: 10.1144/sp461.4
• 发表时间: 2018
• 期刊: Special Publications
• 作者: Bennike;Melles
• 通讯作者: Melles

Testing models of ice cap extent, South Georgia, sub-Antarctic

南乔治亚岛、亚南极洲冰盖范围测试模型

• DOI: 10.1016/j.quascirev.2016.11.007
• 发表时间: 2016
• 期刊: Quaternary Science Reviews
• 影响因子: 4
• 作者: Barlow;Bentley;Hansom;Brader;Zander
• 通讯作者: Zander

Current Sample Preparation and Analytical Capabilities of the Radiocarbon Laboratory at CologneAMS

科隆AMS 放射性碳实验室当前的样品制备和分析能力

• DOI: 10.1017/rdc.2019.16
• 发表时间: 2019
• 期刊: Radiocarbon
• 影响因子: 8.3
• 作者: Rethemeyer;Gierga;Heinze;Wischhöfer;Melchert;Dewald
• 通讯作者: Dewald

Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet

• DOI: 10.1017/qua.2018.85
• 发表时间: 2019-01-01
• 期刊: QUATERNARY RESEARCH
• 影响因子: 2.3
• 作者: Berg, Sonja;White, Duanne A.;Viehberg, Finn
• 通讯作者: Viehberg, Finn