Development of a New Fluid and Geochemical Flux Meter for Seafloor Measurements on Convergent Margins and Ridge Flanks

开发用于收敛边缘和脊翼海底测量的新型流体和地球化学通量计

• 批准号: 9633378
• 负责人: Kevin Brown
• 金额: $ 38.41万
• 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: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1999-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633378&HistoricalAwards=false
• 关键词: Development; New; Fluid; Geochemical; Flux

A new type of water and geochemical flux meter will be developed and tested to measure the chemical parameters and flow rates of fluids that seep from the seafloor into the water column. These measurements address a key component of geochemical and hydro-tectonic studies in both convergent and divergent margins on the seafloor. Accurate determination of the magnitudes and spatial distribution of flux rates of fluid/geochemical components in the system are critical to these geophysical process studies. Instrumentation will be designed to quantify output fluxes (i.e., diffusive and focused) by collecting fluid samples and measuring Darcy fluid velocities through the sediment surface on the order of 0.1 to 100 mm y-1, allowing direct measurements to be attempted for the first time at low flux-rate vents and regions of slow diffuse flow. Funds are also provided to replace several NSF-sponsored instruments that were recently lost at sea during an NSF-funded expedition. Scripps Institution of Oceanography is providing $165,000 in cost sharing, which represents 30% of the total project's cost.

将开发和测试一种新型水和地球化学通量计，以测量从海底渗入水柱的流体的化学参数和流速。 这些测量解决了海底汇聚和发散边缘地球化学和水文构造研究的关键组成部分。准确确定系统中流体/地球化学成分通量率的大小和空间分布对于这些地球物理过程研究至关重要。 仪器将被设计为通过收集流体样本并测量通过沉积物表面的达西流体速度（大约 0.1 至 100 mm y-1）来量化输出通量（即扩散和聚焦），从而允许首次在低通量率喷口和缓慢扩散流区域尝试直接测量。 还提供资金来更换最近在 NSF 资助的探险期间在海上丢失的几件 NSF 赞助的仪器。 斯克里普斯海洋学研究所提供 165,000 美元的费用分摊，占项目总成本的 30%。