Expedition Objective Research (IODP Expedition 340): Diagenesis in tephra-rich marine sediments and the impact of reactive iron on enhanced carbon burial

远征目标研究（IODP远征340）：富含火山灰的海洋沉积物的成岩作用以及活性铁对强化碳埋藏的影响

• 批准号: 1259326
• 负责人: James McManus
• 金额: $ 15万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2013-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1259326&HistoricalAwards=false
• 关键词: Expedition; Objective; Research; IODP; 340

This is an expedition objective research proposal that will use samples from IODP exp. 340 to the Lesser Antilles. This proposal seeks to examine the effect of tephra deposition and diagenesis on sediment chemistry, pore fluids, and ocean chemistry. The specific hypothesis is that tephra sedimentation and diagenesis promotes burial of organic carbon. It does this by consuming oxidizers that would otherwise degrade organic carbon and/or binding carbon to metals. The PI proposes to analyze major and trace elements and Sr isotopes, for all samples and pore waters. The PI also proposes to analyze organic C, carbonate, carbon isotopes, reactive Fe and Al for sediments and pore water solids. The work has the potential to provide an important constraint on the oceanic carbon cycle.

这是一项探险目标研究建议，将使用IODP EXP的样本。 340到较小的安特列斯。该提案旨在检查Tephra沉积和成岩作用对沉积物化学，孔隙液和海洋化学的影响。具体的假设是，tephra沉积和成岩作用促进了有机碳的埋葬。它通过食用否则会降解有机碳和/或结合金属的氧化剂来做到这一点。 PI建议分析所有样品和孔隙水的主要元素和痕量元素和SR同位素。 PI还建议分析有机C，碳酸盐，碳同位素，反应性FE和AL，以用于沉积物和孔隙水固体。这项工作有可能对海洋碳循环提供重要限制。