Collaborative Research: The Flux of Carbon from a Modern Accretionary Prism; In-Situ Measurements of Hydrocarbon Sequestration as Gas Hydrates and Diagenetic Carbonate

合作研究：来自现代吸积棱镜的碳通量；

• 批准号: 9712135
• 负责人: Miriam Kastner
• 金额: $ 43.51万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-10-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9712135&HistoricalAwards=false
• 关键词: Collaborative; Research; Flux; Carbon; Modern

9712135 Kastner At accretionary margins sedimentary carbon is recycled as pore waters are squeezed from the compacting sediments. These pore waters are discharged at natural seeps where some of the carbon is deposited as thick surface and subsurface layers, additional carbon may be sequestered in gas hydrates, and some of the carbon is lost to the water column in gaseous form. The relative proportions and magnitude of these processes, however, are poorly understood. The present project will begin an in situ , experimental approach to examining and quantifying these processes on the Oregon margin. Sampling chambers will be fitted to sealed borehole drilled by the Ocean Drilling Program and will be used to collect precipitate and fluid flow out of the sedimentary section. Samples from the year long experiment will be subsequently analyzed to provide information on the kinetics of carbon sequestration during fluid expulsion. Not only will the research define chemistry of the fluids and associated digenetic deposits, it also will relate the mass deposited over time to a known volume of fluid, and measure the affect of that deposition on sediment permeability. Microbial research will examine the potential role and importance of organisms in controlling the carbon partitioning. ***

9712135 Kastner 在增生边缘，随着孔隙水从压实的沉积物中被挤出，沉积碳被回收。这些孔隙水在自然渗漏处排出，其中一些碳沉积为厚的表面和地下层，额外的碳可能被封存在气体水合物中，并且一些碳以气态形式损失到水柱中。然而，人们对这些过程的相对比例和程度知之甚少。目前的项目将开始采用现场实验方法来检查和量化俄勒冈州边缘的这些过程。 采样室将安装在海洋钻探计划钻探的密封钻孔中，用于收集沉积部分流出的沉淀物和流体。随后将分析来自长达一年的实验的样本，以提供有关流体排出过程中碳封存动力学的信息。该研究不仅将定义流体和相关成岩沉积物的化学性质，还将随着时间的推移沉积的质量与已知的流体体积联系起来，并测量沉积物对沉积物渗透性的影响。微生物研究将检验生物体在控制碳分配方面的潜在作用和重要性。 ***