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

使用新型连续浸出技术揭示钡的沉积相

• 批准号: 0550377
• 负责人: Gary Klinkhammer
• 金额: $ 32.85万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-03-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0550377&HistoricalAwards=false
• 关键词: Unraveling; Sedimentary; Phases; Barium; using

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.

为 PI 的一项为期两年的提案提供资金，以应用 ICP-MS 的自动色谱、流通分析技术来研究海洋沉积物中重晶石和钡的行为。 PI 提出了一种系统方法，他们将首先将 FT 技术应用于来自冷泉的充分表征的重晶石，以建立 Sr/Ba 变化模式，用已知样品验证其结果，并开发溶解所需的溶剂组合。然后他们将使该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巴的了解。具体来说，目标包括更多地了解重晶石中的 Sr 取代程度及其与沉积物中重晶石保存的关系，以及海洋沉积物中各种 Ba 携带相的作用及其对海洋 Ba 循环的贡献。更广泛的影响包括对研究生的支持，以及提供古代理的重要地面实况，这是古海洋学的基础。