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

本项目涉及对EPR上热液和岩浆活动的时间序列研究。1989年ARG0调查（Haymon/Fornari）显示，在9016′~ 9054′N“管虫BBQ区”之间的EPR轴上存在活跃的热液场。1991年4月的探险1“阿尔文在冒险热液区潜水”和1992年2月/ 3月的探险2注意到火山喷发是快速的，一次喷发发生在两周内（日期为210Po/210Pb疾病）。-Rubin)在冒险II之前，热液喷口分布不规则。私家侦探推测这个系统还没有达到稳定状态。他们提议与阿尔文一起回到这个地区，努力监测火山-热液系统的演变。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9016′到9054′n之间的EPR轴上。科学依据——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处于稳定状态期间的广泛约束。在稳定状态下测量通量可以更好地处理热液对海水化学成分的输入。他们也将更多地了解这些系统是如何随着时间而进化的。

Von Damm 9300508 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.