Molluscs as Recorders of Ridge Volcanism and Hydrothermal Vent Field Activity

软体动物作为山脊火山活动和热液喷口场活动的记录者

• 批准号: 9730857
• 负责人: Stanley Hart
• 金额: $ 19.57万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9730857&HistoricalAwards=false
• 关键词: Molluscs; Recorders; Ridge; Volcanism; Hydrothermal

This project will analyze stable isotopes and trace elements in bivalves collected from vent sites on the East Pacific Rise. Potential tracers of water temperture (Sr, Mg, F) and fluid chemistry (metals) will be analyzed by ion microprobe, with 18O analyzed by mass spectrometry, and compared with water samples collected in time-series studies nearby. Partition coefficients will be evaluated, and radiometric dating will be used to determine growth rates. The goal is to determine the utility of bivalves as a record of temperture and fluid chemistry variations on decade to century time scales at mid-ocean ridge hydrothermal systems. If successful, this will provide a tool to asses temporal variability of venting, and to estimate the hydrothermal component of geochemical fluxes.

该项目将分析从东太平洋隆起的火山口收集的双壳类动物的稳定同位素和微量元素。水温（Sr, Mg， F）和流体化学（金属）的潜在示踪剂将通过离子探针进行分析，18O将通过质谱分析，并与附近时间序列研究中收集的水样进行比较。划分系数将被评估，辐射定年法将被用来确定生长速率。目的是确定双壳类作为海洋中脊热液系统在十年到世纪时间尺度上温度和流体化学变化记录的效用。如果成功，这将提供一种工具来评估喷发的时间变异性，并估计地球化学通量的热液成分。