Temporal Variations in Hydrothermal Fluid Chemistry at 9-10N East Pacific Rise: Elucidating Ties to Crustal and Biological Processes

这是对位于北纬9度的Ridge 2000东太平洋隆起综合研究点的热液系统的研究。在过去十年中，观察到了热液流体的显著时间变异性，并对化学数据进行了解释，以表明流体成分的变化反映了热液循环深度的变化。本项目将提出三个假设。相分离深度的变化反映了热源的深度变化。岩浆已经向上迁移，并将很快喷发和/或导致另一次岩浆事件。流体组成的变化反映了反应和相分离的压力-温度条件的变化，是生物群落变化的原因。

This is a study of the hydrothermal systems at the Ridge 2000 East Pacific Rise Integrated Studies site at 9 degrees north. During the past decade pronounced temporal variability in the hydrothermal fluids have been observed, and the chemical data have been interpreted to suggest that the changes in fluid composition reflect changes in the depth of hydrothermal circulation. Three hypotheses will be addressed in the current project. Changes in the depth of phase separation reflect changes in depth to the heat source. Magma has migrated upward and will soon erupt and/or result in another diking event. Changes in fluid compositions, reflecting changes in the pressure-temperature conditions of reaction and phase separation, are the causes of changes in the biological communities.