What's magma doing below the volcano surface? IAVCEI 2013 SESSION 3.4
From: James White <james.white@xxxxxxxxxxx>
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Dear Colleagues,
The organizers of session 3-4 cordially invite you to join our session looking at all the unseen aspects of magma's rise and eruption, from interrupted rise that feeds storage volumes at depth, through the final race to eruptive freedom through volcanic conduits, to cratering and vent evolution during explosive or non-explosive eruptions, including interaction with wall rocks plus/minus fluids at any point in the journey.
Or, more officially:
3-4. Evolution of eruptive craters, vents and conduits from feeding dikes, sills, and magma chambers
We invite contributions on all aspects of the evolution of
magma-transport and –storage systems from magma accumulation in sills
and chambers, dikes carrying magma toward the Earth's surface, to
conduits erupting fragmental material at the surface. Magma
storage in the upper crust commonly occurs in sills, which can grow or
merge to form magma chambers, but magma transfer and eruptions occur
primarily through dikes. By understanding how sills and dikes initiate,
propagate, and merge to form shallow magma chambers,
we can better interpret episodes of volcanic unrest and assess eruption
likelihood and magnitude. To initiate eruption, dikes propagate to or
near the surface; the domain over which dikes give way to eruptive
conduits is a poorly understood one that has great
importance for modeling of eruption style and the nature of attendant
hazard.
We invite contributions addressing crustal magma accumulation to form
magma chambers, thermal and mechanical controls on sheet growth and
arrest, rupture of magma chambers to initiate eruptions, deformation and
erosion of wallrock during dike and sill injection,
the thermal behaviors of magma and wallrock through this transition,
the role of gases and rock permeability, wallrock hydrology, and
wallrock collapse and crater development. Both field-based and
model-developing contributions are invited for systems ranging
from volatile-driven to phreatomagmatic, along with geophysical studies
of evolving dike-fed eruptions.
Organizers:
James White*( james.white@xxxxxxxxxxx)
Valerio Acocella
Greg Valentine
Nobuo Geshi
Agust Gudmundsson
Yosuke Aoki
Shigekazu Kusumoto
Hope to see you there!
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