U.S.-France Collaborative Research: High-Resolution U-Channel Magnetic Study of Late Quaternary Sediment Cores From the East Antarctic Margin.

0129155 Brachouts这个为期两年的美国奖-法国合作研究涉及俄亥俄州州立大学的Stefanie Brachfeld和法国巴黎法国国家科学研究中心气候和环境科学实验室的Catherine Kissel和Carlo Laj。 这项研究的目的是为南极冰川海洋沉积物建立一个经过验证的千年尺度的相关性和测年工具，这超出了放射性碳测年的范围。 研究人员将利用一种确定沉积物岩芯年代的既定地磁方法，将未注明日期的岩芯的古强度记录与高分辨率古强度目标曲线相关联，以便将绝对年龄输入岩芯地点。分析将在东南极陆缘的9个晚更新世至全新世卡斯滕岩心和大型活塞岩心上进行。古地磁强度记录的建立需要研究沉积物记录的剩磁矢量（古地磁学）和研究沉积物中的磁性矿物组合（岩石磁学）。 美国调查员是岩石磁性分析专家。法国在古地磁学方面的专业知识和法国实验室用于测量u通道样本的高分辨率穿透式磁力计的使用权对这一点起到了补充作用。该奖项代表了美国方面向NSF和法国国家科学研究中心（CNRS）提出的联合建议。 NSF将为美国研究人员和研究生提供旅费和生活费。 CNRS将支持法国研究人员访问美国。

0129155BrachfeldThis two-year award for U.S.-France cooperative research involves Stefanie Brachfeld of Ohio State University and Catherine Kissel and Carlo Laj of the Laboratory for Climate and Environmental Sciences at the French National Center for Scientific Research (CNRS), Paris, France. The objective of the research is the construction of a proven, millennial-scale correlation and dating tool for Antarctic glacial-marine sediments beyond the range of radio-carbon dating. Researchers will utilize an established geomagnetic method of dating sediment cores in which paleointensity records from an undated core are correlated with high-resolution paleointensity target curves in order to import absolute ages to one's core site. The analyses will be conducted on nine late Pleistocene through Holocene kasten cores and jumbo piston cores from sites in the East Antarctic land margin. The construction of the paleointensity records requires investigation of the remanence vector recorded by the sediments (paleomagnetism) and investigation of the magnetic mineral assemblage in the sediments (rock magnetism). The US investigator is an expert in rock magnetic analyses. This is complemented by French expertise in paleomagnetism and access to the French lab's high-resolution pass-through magnetometer that will be used to measure u-channel samples. This award represents the US side of a joint proposal to the NSF and the French National Center for Scientific Research (CNRS). NSF will cover travel funds and living expenses for the US investigators and graduate students. The CNRS will support the visits of French researchers to the United States.