Collaborative Research: Temporal Evolution of Hydrothermal, Volcanic and Geologic Properties of the EPR 9-10 Degrees North Following the 1991 Eruption

利利9307295这个项目涉及对EPR上的热液和岩浆活动的时间序列研究。1989年的ARG0测量(Haymon/Fornari)揭示了EPR轴上9016‘至9054’N“Tube Worm BBQ区”的活动热液区域。冒险一在1991年4月的“阿尔文在冒险热液油田潜水”和冒险二在1992年2月/3月注意到喷发是迅速的，一次喷发发生在冒险二之前的两周内(由210Po/210Pbdiseq.-Rubin确定)，热液喷口的分布是不规则的。私家侦探推测，这个系统还没有达到稳定状态。他们建议与阿尔文一起回到这一地区，努力监测火山-热液系统的演化。这项工作将包括CCD成像、水柱和羽流的CTD测量、生物活动监测、火山岩采样，在EPR轴上9016‘和9054’N之间--科学证明--P.I.认为，通过记录火山和热液活动的变化，他们将能够获得系统稳定状态期间的广泛约束，而测量稳定状态期间的通量将更好地处理进入海水化学成分的热液输入。他们还将更多地了解这些系统是如何随着时间演变的。

Lilley 9307295 This project involves a time-series study of the hydrothermal and magmatic activities on EPR. The 1989 ARG0 survey (Haymon/Fornari) revealed an active hydrothermal field on EPR axis between 9016' and 9054' N "Tube Worm BBQ area" . AdVenture I "Alvin diving on the Venture Hydrothermal Fields" in April 1991 and AdVenture II in Feb/Mar'92 noted that eruptions are rapid one eruption took place within two weeks (dated in by 210Po/210Pb diseq.-Rubin) prior to AdVenture II and hydrothermal vents are irregularly distributed. The P.I.s surmised that this system has not yet reached steady-state. They propose to go back to this area with Alvin in an effort to monitor the evolution of the volcanic-hydrothermal system. The work will include CCD imaging, CTD measurements of water column and plume, biological activity monitoring, volcanic rock sampling,on EPR axis between 9016' and 9054' N. Scientific Justification---The P.I.s feel that by documenting the changes in volcanic and hydrothermal activities they will be able to obtain broad constraints over the period during which the system goes steady-state, and mesurement of fluxes during-steady state would give a better handle on the hydrothermal input into the chemical composition of sea-water. They will also know more about how these systems evolve through time.