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Fall AGU Session: Recent Deep-Sea Eruptions
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From: Rachel Haymon <haymon@xxxxxxxxxxxxx>
Dear Colleagues,
We wish call to your attention to a Special Session at AGU this year that
highlights research on Recent Deep-Sea Eruptions (Session V24, see
description below). If your plans include participation in the Fall 2006
AGU Meeting, we hope you will submit an abstract to this exciting session.
If you have any questions, please contact either Rachel Haymon
(haymon@xxxxxxxxxxxxx), Joe Resing (Joseph.Resing@xxxxxxxx), or Suzanne
Carbotte (carbotte@xxxxxxxxxxxxxxxxx).
Best wishes,
Rachel, Joe, and Suzanne
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V24- Recent Deep-Sea Eruptions: Phenomena Observed Before, During, and After
Sponsor: Volcanology, Geochemistry, and Petrology
CoSponsors: Biogeosciences; Ocean Sciences; Seismology; Tectonophysics
Conveners:
Rachel M. Haymon- University of California, Santa Barbara, Dept.
of Earth Science, Santa Barbara, CA, USA 93106
haymon@xxxxxxxxxxxxx
Suzanne Carbotte- Lamont-Doherty Earth Observatory, Columbia Univ, USA
carbotte@xxxxxxxxxxxxxxxxx
Joseph Resing- NOAA-PMEL and Univ. of Washington USA
Joseph.Resing@xxxxxxxx
Index Terms: 8416 8424 8427 0450 3075 .
Most (>70%) of Earth¹s volcanic eruptions occur unseen in the deep-sea,
along mid-ocean and back-arc ridges, at arcs along subduction zones, and
above mantle plumes. Rare opportunities to detect and observe eruptions
at depth have revealed an astonishing host of transient and
rapidly-evolving seafloor, subseafloor, and water column phenomena that
precede, accompany, and follow the eruptions. Recent dike intrusion and
eruptive events along the East Pacific Rise at 8°-11°N and on the
Endeavour Segment of the Juan de Fuca Ridge provide new opportunities to
observe responses of seafloor hydrothermal-biological systems to the
fundamental process of crustal creation along the mid-ocean ridge. Both
locations are Integrated Study Sites of the NSF-sponsored Ridge2000
program. Meanwhile, in the western Pacific, studies of an ongoing
deep-sea eruption since 2004 at NW-Rota 1 Volcano in the Mariana Arc
provide the first direct visual observations and sampling of an
explosive eruption accompanied by degassing of submarine lavas. These
studies were made as a part of NOAA's Ocean Exploration program in 2004
and 2006, and by JAMSTEC in 2005. In 2005, another Ocean Exploration
program documented evidence of a recent eruption of Vailulu'u Seamount,
a mid-plate volcano above the Samoan mantle plume. Unique suites of time
series experiments at all of these sites are detecting and
characterizing environmental conditions leading up to and following
seafloor eruption/intrusion events. This session will explore the nature
of the physical-chemical and biological systems before, during and after
recent deep-sea eruptions, in a variety of geologic settings.
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