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

这项为期两年的美法合作研究奖由俄亥俄州立大学的Stefan ie Brachfeld和法国巴黎国家科学研究中心(CNRS)气候与环境科学实验室的Catherine Kissel和Carlo Laj获得。这项研究的目的是建立一个经过验证的千年尺度的南极冰川-海洋沉积物对比和测年工具，超出放射性碳测年的范围。研究人员将利用一种已建立的地磁方法来测定沉积物岩心的年龄，在这种方法中，来自未确定日期的岩心的古强度记录与高分辨率的古强度目标曲线相关联，以便将绝对年龄输入到一个人的核心处。这些分析将对来自南极东部陆地边缘遗址的9个晚更新世至全新世Kasten岩心和巨型活塞岩心进行。古强度记录的建立需要研究沉积物记录的剩磁矢量(古地磁)和沉积物中的磁性矿物组合(岩石磁性)。这位美国调查员是岩石磁学分析方面的专家。法国在古地磁方面的专业知识和法国实验室的高分辨率直通磁力仪将用于测量U形通道样品，这是法国的补充。该奖项代表了美方向NSF和法国国家科学研究中心(CNRS)提出的联合建议。NSF将支付美国调查人员和研究生的旅费和生活费。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.