Unraveling the Sedimentary Phases of Barium using a Novel Continuous Leaching Technique

为PIS提供了一项为期两年的建议，将电感耦合等离子体质谱仪的自动色谱、流动分析技术应用于海洋沉积物中重晶石和钡的行为研究。PIS提出了一种系统的方法，他们将首先对冷泉中特征良好的重晶石应用FT技术，以建立锶/钡的变化模式，用已知的样品验证他们的结果，并开发溶解所需的溶剂组合。然后，他们将使这一过程适应更复杂的海洋沉积物。更广泛的目标是提高我们对沉积旋回中的钡的认识。具体地说，目的包括更多地了解重晶石中锶的取代程度及其与沉积物中重晶石保存的关系，以及海洋沉积物中不同载钡相的作用及其对海洋巴循环的贡献。更广泛的影响包括对研究生的支持，以及提供重要的古海洋替代物的地面真相是古海洋学的基础。

Funds are provided for a two-year proposal for the PIs to apply the automated chromatographic, flow-through analysis technique for ICP-MS to the study behavior of barites and barium in marine sediments. The PIs propose a systematic approach in which they will first apply the FT technique to well-characterized barite from cold seeps to establish the pattern of Sr/Ba variation, ground-truth their results with known samples, and develop the solvent combination necessary for dissolution. They will then adapt the process to more complex marine sediments. The broader goal is to improve our understanding of the Ba in sedimentary cycle. Specifically, the objectives include the learning more about the degree of Sr substitution in barite and its relation to barite preservation in sediments, and the role of various Ba carrying phases in marine sediments and their contribution to the marine Ba cycle. Broader impacts include support to a graduate student and providing important ground-truthing of a paleo-proxy is fundamental to paleo-oceanography.