Siliceous Paleoceanography: (Ge/Si)opal - III

本研究将利用锗/硅比值在海洋生物成因 硅和蛋白石在南大洋的积累率， 描述了南极生产力的变化， 更新世和晚更新世的大洋硅锗旋回 上第三纪 明年的工作重点是（1） 在新的ICP-MS上实施Ge-氢化物发生方法，以及 建立分析小体积和质量的能力 海洋沃茨和微粒（孔隙沃茨、捕集器 样品，放射虫）;（2）运行和额外的一套硅藻 文化与两个占主导地位的南极物种，包括 “反向”溶解实验测定Ge/Si 硅藻吸收和溶解的分级因子;（3） 出版那些挥之不去的预印本

This study will use germanium/silicon ratios in marine biogenic silica and accumulation rates of opal in the Southern Ocean to characterize variations in Antarctic productivity and in the oceanic silica and germanium cycles over the Pleistocene and Late Neogene. Over the next year efforts will be directed toward (1) implementing the Ge-hydride generation method on a new ICP-MS, and establishing the capability to analyze small volume and mass samples of marine waters and particulates (pore waters, trap samples, radiolaria); (2) running and additional set of diatom cultures with two dominant Antartic species, including the "reverse" dissolution experiment to determine the Ge/Si fractionation factors for both diatom uptake and dissolution; (3) publishing the lingering preprints.