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崛起的通风口收集的双壳类动物中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微探针分析，并通过质谱分析18O，并与附近时间序列研究中收集的水样进行了比较。 将对分区系数进行评估，并将使用辐射测年来确定生长速率。 目的是确定双壳类动力的效用，记录在中山脊中山脊水热系统的十年到世纪的时间尺度的记录。 如果成功，这将为驴的时间变化提供一种工具，并估算地球化学通量的热液成分。