Surface Water Reservoir Ages and Paleoventilation during the LGM and Deglaciation

总结：该项目将通过测定海洋岩芯中与火山岩有关的浮游有孔虫和底栖有孔虫的年代，确定新西兰周围沃茨的地下储层年龄。 这项研究将侧重于测定与川川火山灰（约22,590 14 C yr）有关的样品的年代。 川川火山灰很容易识别，分布广泛，这将使沿着火山灰等时线的中层和深层沃茨的年代测定成为可能。 有孔虫壳的微量元素测量和稳定碳同位素测量也将作为来自14 C年龄分布的循环变化的交叉检查。

Summary: This project will determine subsurface reservoir ages of waters around New Zealand by dating planktonic and benthic foraminifers associated with tephras in marine cores. The study will focus on dating samples associated with the Kawakawa tephra (ca 22,590 14C yr). The Kawakawa ash is easily identified and is widely distributed which will allow dating of intermediate and deep waters along the tephra isochron. Trace element measurements on foraminifer shells and stable carbon isotope measurements will also be done as a cross check on circulation changes derived from the 14C age distribution.