The Abstract Deadline for Goldschmidt Conference is April 1st (23:59 CET)
Please consider sending your contribution to the following session:
Linking the Redox State of Silicate Melts to Magmatic Processes
Convenors: Roberto Moretti, Daniel Neuville
Understanding the redox state of terrestrial materials is extremely important tfor constraining and advancing our knowledge of the formation and evolution of the Earth. Redox is one of the keys to understanding the oxygenation of the Earth and magmatic processes from magma genesis, through crystallization to volcanic degassing. Furthermore, redox affects the properties of materials, and research bridges between materials science and Earth sciences. It is well know that the oxidation state of iron can produce important changes in macroscopic properties like viscosity. More generally, redox can affect the formation and structure of silicate melts and glasses, nucleation and growth of crystals, and degasing of volatiles. The redox ratio of a redox variable element can also be used to determine the oxygen fugacity of a system and potentially of the source region. Recently, new tools have been develop and refined to determinethe oxidation state of redox variable elements in silicate melts and glasses. These include partitioning experiments, Raman spectroscopy, X ray Absorption Spectroscopy, Mossbauer spectroscopy, EELS, and the electron microprobe based "flank method".These advances in experiments and theory are revealing new insights into the atomic structure and macroscopic properties of silicate glasses and melts , the evolution of magmas, and processes operating at spreading centres and subduction zones. The objective of the session is to stimulate discussion of the links between atomic scale structures, macroscopic properties, and magmatic processes in the Earth (and other planetary bodies.
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