Late Cenozoic Ice-Volume Changes in Antarctica Inferred from Cosmogenic Nuclide Measurements

从宇宙成因核素测量推断南极洲晚新生代冰量变化

• 批准号: 9220923
• 负责人: Roy Middleton
• 金额: $ 9.89万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220923&HistoricalAwards=false
• 关键词: Late; Cenozoic; Ice; Volume; Changes

This award is for support of a one year study to complete analyses of samples obtained under a previous grant (DPP-8917581). The analyses to be performed include accelerator mass spectrometric (AMS) dating of rock samples collected in Antarctica for exposure age dating. This work will enhance current understanding of the geologic history of the Dry Valleys and adjacent terrain during the past 7 million years, the period of time accesssible to the mix of isotopes currently being measured. A sample preparation train dedicated to preparing terrestrial samples for calcium-41 analyses will also be constructed to allow the addition of this isotope to the suite of isotopes currently being measured on these samples (Beryllium-10, Aluminum 26, Chlorine-36, and Carbon-14).

该奖项用于支持一项为期一年的研究，以完成先前拨款（DPP-8917581）获得的样品分析。将进行的分析包括对在南极洲收集的岩石样本进行加速器质谱（AMS）定年，以确定暴露年龄。这项工作将加强目前对过去700万年干谷和邻近地形的地质历史的理解，这段时间可以使用目前正在测量的同位素组合。还将建立一个专门用于制备陆地样品进行钙-41分析的样品制备列车，以便将这种同位素添加到目前正在这些样品上测量的同位素套件中（铍-10，铝26，氯-36和碳-14）。