Unraveling the nature of crustal growth and mountain building processes across Earth’s dynamic history relies on integrated studies involving the reconstruction of pressure-temperature-time (P-T-t) -paths from preserved metamorphic assemblages and their textures. Their characterization requires studying microscale compositional variations in textural context, and this session aims to deepen our understanding of petrogenetic processes preserved in metamorphic rocks from a diversity of tectonic settings, from ancient greenstone sequences to the youngest of orogenic belts. Part of the session will be dedicated in particular to studies on geodynamic evolution of high- and ultrahigh-temperature terrains, including -but not limited to- crustal melting and melt extraction from the lower crust.

This session wants to celebrate the progress in metamorphic petrology from microscale to mountain belts. For this reason we would like to invite a wide range of integrated field and petrological contributions, including research in metamorphic terrains from low to ultrahigh pressure and variable metamorphic grade, subduction zones and fluid-rock interaction, as well as studies of very low/low temperature tectonic, diagenetic and hydrothermal environments. Talks focusing on newly discovered metamorphic crustal processes, development and application of novel petrological tools and in-situ geochemical/geochronological techniques are particularly welcome. These may include quantitative microscale mapping methods (e.g. MIcroRaman, EMPA), petrochronology, thermodynamic modeling, fluid inclusion analyses, in-situ stable isotope analyses, and XANES/synchrotron measurements.