Cd/Ca Ratios in Benthic Foraminiferal Shells over the Past 65 Million Years

过去 6500 万年底栖有孔虫贝壳中的 Cd/Ca 比率

• 批准号: 8911530
• 负责人: Margaret Delaney
• 金额: $ 13.56万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-15 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911530&HistoricalAwards=false
• 关键词: Cd; Ca; Ratios; Benthic; Foraminiferal

This is a study of chemical changes in foraminifera shells from the Miocene epoch and rom the Tertiary/Cretaceous boundary layer. Specifically, the investigator will determine the cadmium to calcium ratio in Miocene benthic foraminifera from the Indian, North Atlantic, and Antarctic Circumpolar Oceans; the Cd/Ca ratio in benthic foraminifera from marine sections across the K/T boundary; and the feasibility of modifying methodology to measure Cd/Ca ratios in planktonic foraminifera and fine fraction calcium carbonate. The results will yield insights into paleoceanic circulation patterns and into paleoceanic trace metal and nutrient inventories during the Miocene and across the K/T boundary.

这是一项研究有孔虫壳的化学变化， 中新世和第三纪/白垩纪边界层。 具体来说，研究人员将确定镉， 印度中新世底栖有孔虫的钙比值， 北大西洋和南极绕极海洋;镉/钙比值 在跨越K/T的海洋剖面中， 边界;以及修改方法以衡量 浮游有孔虫中的Cd/Ca比值及微细粒钙 碳酸盐。 这些结果将有助于我们深入了解古海洋 循环模式和古海洋微量金属， 中新世和跨K/T的营养物质清单 边界