Facilities Support: Amino Acid Geochronology Laboratory

设施支持：氨基酸年代学实验室

• 批准号: 1234413
• 负责人: Darrell Kaufman
• 金额: $ 23.48万
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1234413&HistoricalAwards=false
• 关键词: Facilities; Support; Amino; Acid; Geochronology

1234413 KaufmanThis Facility Support grant provides for four years of gradually phased out support for the The Amino Acid Geochronology Laboratory (AAGL) at Northern Arizona University. This facility has been supported by EAR/IF since 2004. The facility supports in excess of 5,000 sample analyses per year for in house and external users as the result of continued EAR/IF partial support of an experienced lab technician. Racemization of amino acids following the death of an organism is proportional to time elapsed since death and the temperature of the reaction environment. AA geochonology therefore provides a tool to date fossil remains for which the temperature history of the environment can be inferred or for paleothermometry if the age of the sample is determined independently (e.g., radiocarbon dating). Sample analysis is rapid and inexpensive and sample size requirements are minimal, allowing for dating of individual microfossils, for example. The history of AAGL includes broad use of the facility for a range of geoscience inquiries and applications including: deep-sea sediment chronology and bottomwater paleothermometry, paleontological time-averaging of fossil assemblages with applications to historical ecology and sequence stratigraphy, sea-level fluctuations, Quaternary tectonic history, glacial geology, terrestrial outcrop (fluvial, eolian, and lacustrine sediments) and lake-core chronostratigraphy, and island land-snail evolution. AAGL data will continue to be archived at a national center, the World Data Center for Paleoclimatology. The Facility will ultimately become self supporting by FY 2016 via gradually higher analytical charges.***

1234413 Kaufman 这项设施支持赠款为北亚利桑那大学氨基酸地质年代学实验室 (AAGL) 提供为期四年的逐步逐步淘汰的支持。 该设施自 2004 年以来一直受到 EAR/IF 的支持。由于经验丰富的实验室技术人员持续提供 EAR/IF 部分支持，该设施每年为内部和外部用户支持超过 5,000 次样品分析。 生物体死亡后氨基酸的外消旋化与死亡后经过的时间和反应环境的温度成正比。 因此，AA 地质年代学提供了一种工具来确定化石遗迹的年代，可以推断出环境的温度历史，或者如果独立确定样本的年龄（例如放射性碳测年），则可以进行古体温测量。 样品分析快速且成本低廉，并且样品量要求极低，例如可以对单个微化石进行年代测定。 AAGL 的历史包括广泛使用该设施进行一系列地球科学调查和应用，包括：深海沉积物年代学和底水古温度测量、化石组合的古生物学时间平均及其在历史生态学和层序地层学中的应用、海平面波动、第四纪构造历史、冰川地质、陆地露头（河流、风成和湖泊沉积物）和湖心年代地层学和岛屿陆地蜗牛演化。 AAGL 数据将继续存档于国家中心，即世界古气候学数据中心。 通过逐步提高分析费用，该设施最终将在 2016 财年实现自给自足。***