Abstract submission for the AGU Fall meeting will open soon.
A complete list of the sessions was published at:
http://www.agu.org/meetings/fm09/program/index.php
We invite contributions to the following session:
V18: The Role of CO2 in Magma Evolution and Degassing Processes
Sponsor: Volcanology, Geochemistry and Petrology
http://www.agu.org/meetings/fm09/program/scientific_session_search.php?show=detail&sessid=174
Description:
Magma degassing and crystallization are two critical and associated volcanic processes that play a major role in volcanic eruption style. Volatile transport and loss are strongly dependent on bubble growth, coalescence and ascent in volcanic conduits. In particular, carbon dioxide may exert a critical influence on magma evolution, possibly promoting magma dehydration, and processes that control both the chemistry of volcanic gas emissions at the surface and volcanic eruption dynamics. These problems are closely linked with the CO2 budgets of volcanoes, and thus global CO2 fluxes. This session will provide the opportunity to link these various studies for comprehensive understanding.
This session will bring together physical, experimental, and numerical studies that examine degassing, gas bubble transfer and degassing budgets with a focus on CO2. Studies of melt inclusions, volatile diffusivity, crystal/bubble growth, and surface gas records are welcome. Important questions regarding (i) the melt inclusion record of CO2 and H2O evolution upon magma ascent, (ii) the potential role of a CO2-rich gas phase on magma evolution and degassing (ii) the disequilibrium processes that would result from differential diffusion during decompression, and (iii) CO2 degassing budget will be addressed.
Conveners of this AGU session:
Nicole Metrich
Laboratoire Pierre Sue - CNRS/CEA
CE-Saclay
Gif sur Yvette, FRA 91191
+33-1-69-08-85-11
nicole.metrich@xxxxxx
Hiroshi Shinohara
Magmatic Activity Research Group, Geological Survey of Japan, AIST,
Higashi 1-1-1, Central 7
Tsukuba, JPN 305-8567
81-29-861-3912
shinohara-h@xxxxxxxxxx
Emily R Johnson
University of Tasmania
CODES, ARC Centre of Excellence in Ore Deposits.University of Tasmania, Private Bag 126
Hobart, Tasmania, AUS 7001
+61-03-62-26-72-10
Emily.Johnson@xxxxxxxxxxx
Best regards
Hiroshi Shinohara
Emily R Johnson
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