Pacific Deep Ocean Paleochemistry

该奖项将支持涉及在海底有孔虫贝壳中使用微量金属(Ba、Cd、Sr)的各种研究，以应用于古深海循环。以前的工作表明，痕量金属和13-C并不遵循相同的趋势，尽管它们都被用作深水类型的示踪剂。该项目将分析来自各种环境的活标本，并将结果与共存的死标本进行比较，以确定早期成岩作用的影响；将相同的值与底水和孔隙水(由其他人测量)进行比较，以确定生物体反映环境条件的准确性；并检查热带太平洋西部(安通-爪哇高原)和东部(科科斯海岭)的所有示踪剂在上一个冰川周期中的变化，以便建立关于深层环流变化的一级记录。

This award will support a variety of studies involving use of trace metals (Ba, Cd, Sr) in benthic foraminiferal shells for application to paleo-deep ocean circulation. Previous work has shown that trace metals and 13-C do not follow the same trends, although they have all been used as tracers of deep-water type. The project will analyze live specimens from a variety of environments and compare results with co-occurring dead specimens to determine effects of early diagenesis; compare the same values with bottom water and pore waters (measured by others) to determine how accurately the organisms reflect ambient conditions; and examine changes in all tracers in depth transects from the western (Ontong-Java Plateau) and eastern (Cocos Ridge) tropical Pacific over the last glacial cycle, in order to establish a first-order record of deep circulation changes.