Reconstruction of Particle Paleofluxes to the Seafloor by 230Th and 231Pa Profiling in Deep-Sea Sediments

通过深海沉积物中的 230Th 和 231Pa 剖面重建海底的粒子古通量

• 批准号: 9200780
• 负责人: Michael Bacon
• 金额: $ 29.5万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-11-15 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9200780&HistoricalAwards=false
• 关键词: Reconstruction; Particle; Paleofluxes; Seafloor; 230Th

This award will allow the PIs to continue the development of Thorium-230 profiling in marine sediments as a paleoceanographic tool. Th-230 flux to seafloor has been shown to be largely independent of particulate flux, but closely related to the rate of production in the water column. This property can be exploited to independently calculate sediment flux to the seafloor. Sediment trap work accomplished so far supports this model for modern sediment flux and in the next phase the work will be carried back to isotopic stage 5/6 in Southern Ocean.

该奖项将允许PI继续开发 海洋沉积物中钍-230剖面的古海洋学意义 工具. Th-230到海底的通量已被证明主要是 独立的颗粒通量，但密切相关的速率 在水柱中生产。可以利用此属性来 独立计算沉积物流向海底的通量。沉积物 迄今为止完成的陷阱工作支持这种模式， 沉积物通量，并在下一阶段的工作将进行回 到同位素阶段5/6在南大洋。