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AGU Session V5: Genesis of high-Mg andesitic and adakitic compositions
From: Georg Zellmer gzellmer@xxxxxxxxxxxxxxxxxxx
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Dear colleagues,
We would like to draw your attention to the following session organized at
this year's AGU Fall Meeting:
V05: Generation of High-Mg Andesitic and Adakitic Magmas - Petrogenetic Models
and Ways Forward
Invited speakers:
Peter Kelemen, Columbia University
Othmar Muentener, University of Lausanne
Robert Rapp, Australian National University
Description:
The generation of high-Mg andesitic and adakitic melts have been linked to a
variety of processes including slab melting, equilibration of percolating slab
melts with wedge peridotite, melting of continental lithosphere removed by
forearc subduction erosion, melting related to continental lithospheric
delamination, lower crustal melting, and assimilation of mafic crustal
cumulates into more evolved melts. While each of these processes can explain
some of the observations, in many cases there is significant controversy as to
which model applies. Major problems are to define criteria to distinguish
these processes and to determine which processes are dominant in explaining
the majority of occurrences of high-Mg andesitic and adakitic melts. We
particularly encourage contributions that test or present means of testing the
available petrogenetic scenarios, and welcome contributions from the fields of
mineralogy, petrology (including experimental petrology), geochemistry, melt
inclusion studies, and any other suitable approaches, including those that
incorporate geophysical observations.
Conveners:
Georg F Zellmer, Academia Sinica
Jennifer Garrison, California State University
Suzanne M Kay, Cornell University
Pablo Samaniego, Université Blaise Pascal - CNRS - IRD
Please submit your abstracts by 03 September 2009 — 23:59 Eastern Daylight
Time (EDT) or 03:59+1 GMT. All relevant contributions are welcome. We are
looking forward to seeing your in San Francisco!
Georg Zellmer
(on behalf of the conveners)
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