Siliceous Paleoceanography: (Ge/Si)opal - III

这项研究将使用海洋生物成因硅中的锗/硅比和南大洋蛋白石的积累速率来表征南极生产力以及更新世和新近纪晚期海洋硅和锗循环的变化。明年将致力于(1)在新的电感耦合等离子体质谱仪上实施Ge氢化物发生方法，并建立分析海水和颗粒物(孔隙水、陷阱样本、放射虫)的小体积和大量样本的能力；(2)对两个优势南极物种进行连续和额外的硅藻培养，包括“反向”溶解实验，以确定硅藻吸收和溶解的Ge/Si分馏因子；(3)出版挥之不去的预印本。

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.