Caroline Martel, Riccardo Avanzinelli, Maxim Portnyagin and Roman Botcharnikov (contact: r.botcharnikov@mineralogie.uni-hannover.de)

This session invites contributions addressing all aspects of magma origin and evolution in the Earth mantle and crust through petrological, geochemical and experimental investigations of volcanic rocks. Particularly welcome are results obtained by using non-traditional approaches such as time-series study of volcanic rocks (lavas or tephras), development and application of new microelement and isotope proxies to decipher deep magmatic processes, results from melt and fluid inclusion studies as well as experimental simulation of deep magmatic systems.

Matteo Alvaro, Silvio Ferrero and Ross Angel (contact: matteo.alvaro@unipv.it)

Protected by their host minerals which act as “pressure vessels” that prevent post-formation alteration, inclusions yield a wealth of information on geological processes that otherwise would remain invisible at the whole rock scale. Both hosts and inclusions have the capability to record pressure and temperatures of encapsulation, mantle metasomatic processes, magma genesis, mineral solubility, mineral growth, redox processes and mass and heat transfer. The correct interpretation of the geological record preserved in the inclusions – whether they are mineral, poly-phase, melt or fluid inclusions- requires careful microstructural and microchemical investigation of both inclusion and host. Recent methodological and technical advances, in particular in the analysis of solid and melt inclusions, have resulted in new ways of extracting this information. This session will be devoted to a presentation and discussion of new and revised methodologies for the measurement, analysis and geological interpretation of mineral, fluid and melt inclusions. Contributions describing (1) theoretical analysis of host-inclusion systems, (2) methodological advances in inclusion characterization, (3) microstructural studies of fluid, melt and poly-phase inclusions and their hosts in natural rocks, are all welcome.

The Keynote speaker will be Maria Luce Frezzotti (University of Milano Bicocca, Italy)

In association with this session there will be a workshop to teach participants how to measure stress states in solid inclusions, and how to interpret the results as entrapment conditions, thus identifying P-T points in the rock history. Full details on the workshop page.

Rainer Abart, Wilhelm Heinrich and Encarnación Ruiz Agudo (contact: rainer.abart@univie.ac.at)

Advances in analytical techniques allow for retrieving chemical and isotopic composition, crystallographic orientation, and lattice strain at unprecedented accuracy and spatial resolution. Time series experiments and in-situ observation using atomic force microscopy, X-ray, synchrotron or spectroscopic methods allow for quantifying reaction rates in the laboratory. Through this new insights into the processes underlying mineral reactions are generated, and kinetic models are continuously refined. This is crucial for reading the petrogenetic information engraved in the mineralogical, microstructural and textural record of rocks.. We invite researchers concerned with mineral reaction in all geological environments, including high temperature magmatic and metamorphic systems as well as the water-mineral interface at hydrothermal and ambient conditions. Contributions dealing with natural and synthetic materials as well as theoretical studies including both macroscopic and atomistic approaches are welcome.

Lukas Baumgartner, Pavel Pitra and Dave Waters (contact: pavel.pitra@univ-rennes1.fr)

Metamorphic rocks contain the record of orogenic processes. Understanding orogeny depends critically on reading the patterns of microstructure and mineral composition in order to constrain metamorphic conditions and their evolution in time and pressure-temperature space. Considerable progress has been achieved through the application of the principles of equilibrium thermodynamics, typified by the widespread use of calculated phase diagrams. However, complete sample-scale equilibration is the exception rather than the rule in most crustal rocks, thermodynamic data are incomplete or imprecise, and interpretation of textural relations is often subjective. We invite contributions from all fields of metamorphic petrology critically assessing the interpretation of metamorphic textures and their implications for determining the P-T-time evolution of rocks, and for interpreting larger-scale geodynamic processes.