2015 RiP – Leeds

The 2015 MSG Research in Progresses meeting in Leeds offered an exciting and diverse array of presentations. Speakers touched on huge range of topics, ranging from the small to the orogen scale. The morning session started off with the keynote talk on metamorphic fluid migration by Matthias Konrad-Schmolke from the University of Potsdam, Germany. Matthias focused on the application of high resolution, high precision analytical techniques, such as focused ion beam and transmission electron microscopy, to elucidation fluid migration. By integrating these techniques with combined thermodynamic-geochemical models, Matthias was able to quantify the amount of synmetamorphic fluid percolation as well as the degree of fluid-rock interaction, both of which are fundamental to understanding metamorphic element budgets.

This year’s invited speaker was Giles Droop from the University of Manchester, UK. Giles presented a study on partially molten metapelites from the thermal aureoles surrounding the Etive and Huntly complexes in Scotland. Applying detailed field mapping and thermodynamic modelling, Giles compared the observed and thermodynamically-modelled anatectic melt volumes to elucidate anatectic processes. The data indicate that partial melting in the Etive aureole began in fluid present conditions before progressing to fluid absent conditions and that the orientation of leucosome veins was controlled by tensile stresses associated with thermal contraction during cooling. Evidence of very high (60%) melt production in some domains of the Huntly aureole was inferred from geochemical mixing calculations, partial melting experiments as well as thermodynamic modelling. Field relations indicate that melt loss in the Huntly aureole was likely continuous and that the orientations of leucosome veins was controlled by tensile stresses that resulted from cooling of the intrusion.

In addition to faculty and postdoctoral presentations, there was a high caliber of student talks. The award for top student presentation, sponsored by the Journal of Petrology, went to Brendan Dyck (DPhil at the University of Oxford) for his talk on melt-fluxed metamorphism and the nebulitic tourmaline leucogranites in the Himalaya. The award for top student poster went to Anna Bidgood (MSc at the University of Oxford) for her poster on thermodynamic modelling of the Hoosac Schist, western Massachusetts.