EGU 2007 Session on Magmatic Differentiation

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From: Valentin R. Troll <trollv@xxxxxx>
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Dear Colleagues,

We would like to draw your attention to the following session scheduled for the 
EGU meeting in Vienna, Austria in April 2007.


GMPV9 Magmatic differentiation: current ideas and future developments


Magmas provide one of the most important probes of the interior of the Earth. 
Chemical information locked in plutonic or volcanic rocks (solidified magma) 
can, in principle, be used to ascertain the compositions of the source from 
which the magma was originally formed and the physical conditions of melt 
generation. However, in all but a few cases, the compositions of magmas change 
as they ascend through the lithosphere in response to differentiation processes 
such as fractional crystallisation, crustal contamination and mixing with other 
magmas. Recognising that the crystalline components within the rock do preserve 
a record of these differentiation processes, we can apply, for example, modern 
in situ trace element and isotopic analytical techniques to unravel the 
differentiation history of plutons and volcanoes. This not only gives us a 
means of accounting for the effects of differentiation and constraining the 
nature of the original magma source(s), but also gives us a way of quantifying 
the mechanisms and elemental fluxes associated with such processes. This 
session seeks to bring together researchers that are aiming to unravel 
differentiation processes by applying methodologies such as crystal isotope 
stratigraphy, classic and experimental petrology, geochronology and 
geochemistry to quantify fractional crystallisation versus magma-crust 
interaction or mixing processes and constrain their respective time-scales.


Conveners:
Troll, V.R, (Trinity College Dublin, trollv@xxxxxx)
Gertisser, R.; (University of Keele, r.gertisser@xxxxxxxxxxxxxxxx)
Charlier, B., (Open University, b.l.a.charlier@xxxxxxxxxx)

http://meetings.copernicus.org/egu2007

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