GRGC: Dating and Correlation of Paleoclimate Proxy Records

GRGC：古气候代理记录的年代测定和关联

• 批准号: 9405374
• 负责人: Stein Jacobsen
• 金额: $ 4.93万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-15 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405374&HistoricalAwards=false
• 关键词: GRGC; Dating; Correlation; Paleoclimate; Proxy

9405374 Jacobsen Project involves development of a high-precision 87Rb-86Sr dating technique applicable to both lavas and foraminifera. One objective is the evaluation of this method for leucite-bearing Italian volcanics by study of groundmass minerals and phenocrysts in historical lavas. A second is an evaluation of the disequilibrium dating method applied to both shallow and deep water samples containing forams from the Pacific, plus initial investigation using del 234U dating of forminiferal ooze in Toba Ash horizons. The ultimate goal is to provide precisely time-resolved climate proxy records to increase our ability to understand causes of cyclic variation in climate.

小行星9405374 项目涉及开发高精度87 Rb-86 Sr测年仪 适用于熔岩和有孔虫技术。 一个目标 通过研究历史熔岩中的基质矿物和斑晶，对这种方法在含白榴石的意大利火山岩中的应用进行了评价。 第二个是不平衡测年方法的评估适用于浅水和深水样品含有有孔虫从太平洋，加上初步调查使用del 234 U测年在多巴灰层forminiferal软泥。 最终目标是提供精确的时间分辨气候代用记录，以提高我们理解气候周期变化原因的能力。