DI51C-07
Densification of magmas at depth: geophysical and geochemical consequences
Friday, 18 December 2015: 09:30
303 (Moscone South)
Chrystele Sanloup1, Jessica Hudspeth1, Benjamin Cochain1, Zuzana Konopkova2 and Wolfgang Morgenroth2,3, (1)University Pierre and Marie Curie Paris VI, Paris, France, (2)DESY Deutsches Elektronen Synchrotron, Hamburg, Germany, (3)Goethe University Frankfurt, Frankfurt, Germany
Abstract:
Density of silicate melts can now be measured on a large P-T range covering the upper mantle and part of the lower mantle. These data will be interpreted in the light of structural data to understand the compression mechanisms at stake in the densification of magmas, e.g. the collapse of voids, coordination increase for the major cations, and bond compressibility. These densification processes profoundly affect not only the physical properties of the melt, but also its chemical properties, i.e. the way elements partition between the magma and a metallic melt or between the magma and crystals. Potential consequences on the crystallisation of a planetary magma ocean will be discussed.
