SGER: Evaluation of Hydrothermal Fluid Crustal Residence Times in the Global Ridge System Using Radium Isotopes

SGER：使用镭同位素评估全球海脊系统中热液流体地壳停留时间

• 批准号: 0906573
• 负责人: David Kadko
• 金额: $ 8.07万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0906573&HistoricalAwards=false
• 关键词: SGER; Evaluation; Hydrothermal; Fluid; Crustal

This research facilitates the collection and analysis of radium isotope ratios in high temperature and pressure hydrothermal submarine vent fluids collected from the seafloor. These measurements will allow the crustal residence times of the fluids to be determined, providing important information on the time scales of fluid movement and water-rock interaction in ridge axis crust. Rock and fluid samples from four major hydrothermal systems (East Pacific Rise, Lau Spreading Center, Juan de Fuca Ridge, and Mid-Atlantic Ridge) on the mid-ocean ridge will be analyzed. Resulting data are critical for the synthesis and integration of rock and biological data for the Ridge 2000 program which focuses on three of the four specified targeted sites. Owing to the rapid decay of radium in hydrothermal fluids, the research to be a time critical study. Broader impacts of the work include augmenting the Ridge 2000 dataset and incorporation of results into undergraduate courses in oceanography at the University of Miami.

本研究为从海底采集的高温高压热液海底喷口流体中镭同位素比值的收集和分析提供了便利。这些测量将允许确定流体的地壳停留时间，为脊轴地壳中流体运动和水岩相互作用的时间尺度提供重要信息。将分析大洋中脊上四个主要热液系统（东太平洋隆起、劳扩张中心、胡安·德·富卡海岭和中大西洋海岭）的岩石和流体样本。结果数据对于Ridge 2000计划的岩石和生物数据的综合和整合至关重要，该计划侧重于四个指定目标地点中的三个。由于热液流体中镭的快速衰变，该研究是一个时间紧迫的研究。这项工作的广泛影响包括扩大Ridge 2000数据集，并将结果纳入迈阿密大学海洋学本科课程。