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

Von Damm 9300508 该项目涉及对EPR热液和岩浆活动的时间序列研究。1989年ARG 0调查（Haymon/Fornari）揭示了EPR轴上9016'和9054' N“Tube Worm BBQ区”之间的活跃热液区。1991年4月的第一次冒险“阿尔文在冒险热液田潜水”和1992年2月/3月的第二次冒险指出，喷发是迅速的，一次喷发发生在两周内（210 Po/210 Pb diseq.-）。Rubin）在AdVenture 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。 他们建议和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、火山岩取样，EPR轴在北纬9016'和9054'之间。科学论证--私家侦探们认为， 记录火山和热液活动的变化，它们将能够在系统达到稳定状态期间获得广泛的限制，而在稳定状态期间测量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如何随着时间的推移而演变。

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.