Molluscs as Recorders of Ridge Volcanism and Hydrothermal Vent Field Activity

该项目将分析从东太平洋海隆喷口收集的双壳类中的稳定同位素和微量元素。 用离子探针分析了水温（Sr、Mg、F）和流体化学（金属）的潜在示踪物，用质谱分析了18O，并与附近时间序列研究中采集的水样进行了比较。 将评估分配系数，并将使用放射性测年法确定生长率。 目的是确定双壳类作为记录大洋中脊热液系统在十年至世纪时间尺度上温度和流体化学变化的实用性。 如果成功，这将提供一个工具，以评估排放的时间变化，并估计地球化学通量的热液成分。

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.