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

将研制和测试一种新型的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。这些测量处理了海底汇聚和发散边缘的地球化学和水文构造研究的一个关键组成部分。准确确定系统中流体/地球化学成分通量速率的大小和空间分布对这些地球物理过程的研究至关重要。将设计仪器，通过收集流体样品和测量达西流体通过沉积物表面的速度（0.1至100毫米y-1）来量化输出通量（即扩散和聚焦），从而首次尝试在低通量喷口和缓慢扩散流动区域进行直接测量。基金还提供了更换几个nsf赞助的仪器，这些仪器最近在一次nsf资助的探险中在海上丢失。Scripps海洋学研究所提供16.5万美元的成本分担，占项目总成本的30%。

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.