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From:
Mark Reagan <mark-reagan@xxxxxxxxx>
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We would like to invite you to submit your contribution to session S47
at the Goldschmidt 2007 Conference in Köln Germany (19th - 24th August;
abstract deadline: April 19th).
S47: "Links between radioactive isotopes and diffusion modelling to
constrain the timescales of magmatic processes"
In the last 10 to 15 years, there have been major advances in our
understanding of igneous processes because we have been able to
determine the time scales of magmatic processes with an unprecedented
level of precision, age range, and spatial resolution. These include
measurements of the timing of magmatic events using short-lived
radioactive isotopic clocks (e.g., U-Th series disequilibria) and in
situ age determinations of single crystals or even individual parts of
very young materials (< 1 Ma). Kinetic modeling techniques have also
increasingly constrained the time scales of igneous processes, which in
many cases are of durations accessible only to the shortest- lived
isotope clocks. This session welcomes presentations that constrain the
rates of igneous processes using any of these methods and aims to find a
common ground for applications. Possible topics of discussion include:
(1) the rates of evolution of silicic volcanic and plutonic systems, (2)
magma generation, transport and storage time scales at subduction zones
and ocean islands, (3) temporal evolution of radioactive isotopes at
long lived versus currently active volcanoes.
Keynote speaker: Ken Sims (Woods Hole Oceanographic Institution):
"U-series constraints on the processes and timescales of magma genesis
and evolution". Invited speakers: Bruce L.A. Charlier (Dept. of Earth
Sciences, The Open University), Brian Jicha (Department of Geology and
Geophysics, University of Wisconsin- Madison); Dan Morgan (School of
Earth and Environment, University of Leeds). Conveners: Fidel Costa
Rodriguez (fcosta@xxxxxxxxxxx), Mark Reagan (mark-reagan@xxxxxxxxx)
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Mark Reagan
Department of Geoscience
121 Trowbridge Hall
University of Iowa
Iowa City, IA 52242
tel: 319-335-1802
fax: 319-335-1821
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