Triple oxygen isotope measurements (16O/17O/18O) in O-bearing compounds have become an important part of the geochemical toolkit over the past two decades, influencing various fields such as atmospheric chemistry, meteorites and planetary science, hydrology, paleoclimatology, atmospheric evolution and forensic studies, among other promising applications. This session invites contributions using the 16O/17O/18O isotope system to study modern- and paleo- O-bearing materials, including (but not limited to) waters, ice, sulphates, nitrates, perchlorates, carbonates and silicates. Contributions are welcomed that address analytical methods, theoretical predictions (models), and empirical observations of 16O/17O/18O in water (ice, liquid, vapour) and minerals, with special focus on applications. Presentations discussing technical limitations, analytical improvements, standardization and calibrations to understand kinetic and equilibrium fractionation of 16O/17O/18O are also encouraged. An important goal is to bring together researchers engaged in this field to discuss analytical error, reference materials, reporting of triple oxygen isotope measurements and emerging applications.

The second half of twentieth century has seen some of the most important developments in chemical analysis in geology and geochemistry. Based on the well-known physical rules that drive the behavior of particles and rays, recent technological advances have created opportunities for new developments based on microbeams : Electrons, ions, protons, neutrons, X-rays, IR to UV lights including laser. This session invites contributions describing and applying the latest developments in Electron Probe Micro Analyzer (EPMA), Scanning Electron Microscopy (SEM), Secondary Ion Mass Spectrometry (SIMS), Proton-Induced X-ray Emission (PIXE), Laser Ablation – Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS), Raman and Infrared spectrometry, synchrotron based technics and others, in the contest of geological materials.

We encourage contributions that highlight new protocols and technical improvements, as well as original works based on the combination of different techniques.

One of the major challenges in the study of geological processes occurring in the Earth’s crust and mantle derives from the impossibility of direct access to these portions. However, recent methodological and technological advances have improved our capability to observe and quantify the fingerprints of geological processes at much finer spatial and temporal resolutions. Microstructures within igneous, metamorphic, and deformed rocks are archives preserving abundant information about processes occurring throughout the crust and the mantle, such as mantle melting and metasomatism, heating and cooling events, fluid mobility, the timing and location of nucleation and crystal growth, mechanisms and timing of deformation, fluid dynamical behaviour during magma crystallization.

The study of microstructure provides direct information on the history and timescales of geological processes, allowing the development of chemically- and physically-based models of deep and surface processes acting under equilibrium and disequilibrium conditions. They provide fundamental piece of information for short- and long-term eruption forecasting, planetary evolution, crustal differentiation, deformation, and exhumation, and global volatile cycling.

The Big Fat Session of the Year focuses on the study of microstructures sensu lato covering the entire range of igneous and metamorphic petrology in various tectonic settings. Contributions in this session will include new applications of well-established techniques, showcase development of new microstructural and analytical techniques, careful sample characterization from micro- to macroscopic scale prior to textural, chemical and isotopic analyses. We present multidisciplinary studies focused on linking quantitative datasets to field and geophysical observations challenging the difficulties related to processes marked by strong disequilibrium.

Public information:
17 scientists declared that they will participate in the GMPV1.4 chat planned on Friday, 8 May, from 14.00 to 15.45. We plan that after short introduction from the convener each of the listed authors will type short introduction highlighting the most important results of her/his study, and there will be short time (6-8 minutes) for questions and comments from chat participants. The displays should be presented in the following sequence:

Introduction from the Conveners
Penny Wieser
Lütfiye Akin
Sofia Vorobey
Andres Libardo Sandoval-Velasquez
Hugo van Schrojenstein Lantman
Francesca Piccoli
Bernardo Cesare
Marnie Forster
Emmanuelle Ricchi
Evgeny Limanov
Igor Villa
Silvio Ferrero
Kira Musiyachenko
Benoit Dubacq
José Alberto Padrón-Navarta
Anna Redina
Filippo Carboni
Andrea Luca Rizzo
Sarah Lang
Georg Löwe

At the end, we will use spare time for questions that attendees had no time to ask in the thread.

This session concerns about the interrelation between microstructures and geologic processes. One the one hand, microstructures (fabrics, textures, grain sizes, shapes, etc) can be used to identify or quantify, e.g., deformation, metamorphic, magmatic or diagenetic phenomena (to name a few). On the other hand, physical properties of geo-materials are governed by their microstructure, hence predicting a materials property is greatly enhanced by understanding of how certain processes result in a specific microstructure.

All these mechanisms are likely to cause modification on the rheological, elastic, and thermal properties of these rocks, providing key information on the evolution of the lithosphere.
In this session, we invite contributions from field observations, laboratory experiments, and numerical modelling that relate microstructures to rheology, strain localization or mineral reactions, that use microstructures to tackle general problems in structural, metamorphic, magmatic or economic geology as well as studies quantifying physical and mechanical properties of rocks based on their microstructural and textural properties using well established or novel methods.

Natural fluids mainly escape from the Earth interior in volcanoes and active seismic regions. New attention is recently posed to the quiescent volcanoes since multidisciplinary investigations showed that magma accumulations at depth coupled to high degassing of volatiles still occurs after long time from the last activity highlighting a risk of reactivation after long phases of inactivity. Furthermore, magma accumulations in regions far from volcanism have an active role in seismicity, in fact magma and its volatiles can lubricate faults and generate overpressure in crustal layers.
Fluids have a key role in processes that generate volcanic activity and earthquakes; they transfer messages to the surface about how the natural systems work. The geochemical monitoring allows recognizing these natural processes and their evolution over time. Recently geochemical observations are supported by the advances of technology that also permit to measure at high frequency geochemical parameters in site. Furthermore new experimental works are producing constrains about the origin and migration of fluids and their behavior during rock deformation.
We are approaching an interesting phase where the geochemistry can actively interact in a multidisciplinary context for investigating natural processes. Great interest is towards the use of the new technologies and methods to solve for complex analytical challenges in geochemical investigations and monitoring of volcanoes and seismic regions. Their use coupled to the basic models of rock-fluids interactions and experiments of fluids generation/migration is contributing to improve the understanding of these natural processes, providing fundamental constrains for monitoring.
We welcome abstracts from various backgrounds, including researchers using traditional and non-traditional geochemical tracers, noble gases, stable isotopes and water chemistry. We wish that this session will be of broad interest to researchers studying hydro-geochemistry, isotope geochemistry, volcanic degassing etc. This will lead to a session that reflects a cross-section of researchers who apply these tracers to the monitoring of volcanoes and seismic activity. We hope in this way to highlight the potential scientific advances available through the combination of these complementary areas of study and specific techniques, and to encourage future collaborative efforts to resolve the many outstanding questions in volcanic and seismically active systems.

The powerful combination of high-resolution geochronological data, innovative isotopic geochemistry and petro-structural analysis is continuously progressing our understanding of geological processes within the Earth's dynamic lithosphere. Moreover, the development of new techniques and improvement of analytical equipment inspire future progress and development.
This session aims to highlight multiscale and multi-disciplinary approaches to the use of radiogenic isotopes in unravelling duration and mechanisms of geological processes in different environments. Particularly we welcome contributions in which geochronology is coupled with petrology, major, trace elements and isotope geochemistry, phase equilibrium modelling, and structural geology.