Information - GMPV12 Redox signature of minerals, melts and glasses: analysis, experiments and models
At the redox conditions relevant to terrestrial and planetary
systems elements like e.g. Fe, Mn, V, Eu, S may exist in variable
proportions of two or more valence states. This results in physical
properties and thermodynamic equilibria of planetary materials which are
sensitive to fO2. They provide a potential window into the evolution of
oxygen fugacity as a function of space and time, information which itself
may have important geodynamical implications on a local or global scale.
Understanding these systems requires quantitative knowledge on the
relationship of physical and chemical properties to fO2. Thanks to
experimental efforts and recent advances in spectroscopic and analytical
techniques it is now increasingly possible to study the local environments
and abundance of multivalent elements in materials of interest to the
Earth sciences. This session invites presentations which treat one or more
of the following aspects: a) spectroscopic studies which quantify the
incorporation mechanisms and/or relative proportions of multivalent
elements in crystalline or amorphous materials; b) experimental
quantification and development of models on the behaviour of multivalent
elements at temperature, pressure and fO2; c) studies of rocks from Earth
or other planetary environments emphasizing on the implications of the
distribution of multivalent elements therein.
Preliminary List of Solicited Speakers
Dominique Lattard (Universitaet Heidelberg, D)
Roman Botcharnikov (Universitaet Hannover, D)
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