Isotopic Provenance Study of Ice-Rafting in the North Atlantic
Isotopic Provenance Study of Ice-Rafting in the North Atlantic
批准号:
9907290
负责人:
Sidney Hemming
金额:
$15.21万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2000
资助国家:
美国
项目状态:
已结题
起止时间:
2000-01-01 至 2001-12-31
中文摘要
PI将继续研究上一次冰川期间北大西洋冰筏碎屑(IRD)的地质来源,以推断哪些冰原经历了加速崩解,导致海因里奇层沉积,作为向海洋注入淡水的记录。这些都会对气候突变产生影响。这项研究将涉及对北大西洋三个岩心的IRD单个颗粒进行AR40/AR39分析。这项多同位素和岩石学工作可能产生与第四纪末期海洋-气候-冰盖相互作用和劳伦特冰盖区域动力学有关的重要结果。
英文摘要
The PI will continue her work on the geological provenance of ice-rafted detritus (IRD) in the North Atlantic during the last glaciation in order to infer which ice fields underwent accelerated calving leading to deposition of Heinrich layers as records of fresh-water injection in the ocean. These have implications for abrupt climate change. The study will involve Ar40/Ar39 analyses of individual grains of IRD from three cores in the North Atlantic. This multi-isotopic and petrological work could produce important results related to ocean-climate-ice sheet interactions in the late Quatenary and regional dynamics of the Laurentide ice sheet.
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