- GEOCHEMICAL THERMODYNAMICS
Convener: Donato Belmonte (UNIGE) – Marino Vetuschi Zuccolini (UNIGE)
Lectio Magistralis: Giulio Ottonello (DISTAV, University of Genova)
Invited Speakers: Enrico Bonatti (LDEO – Columbia University) – Bartolomeo Civalleri (DdC – University of Turin) – James Connolly (ETH – Zürich) – Jibamitra Ganguly (University of Arizona) – Carlo Gatti (SCITEC-CNR) Pascal Richet (IPGP – Paris) – Surendra Saxena (CeSMEC – Florida International University)
“When the knowledge is weak and the situation is complicated, thermodynamic relations are really the most powerful”. These simple words by Richard Feynman reveal how thermodynamics is key to understanding physico-chemical processes in the Earth and planetary systems. Whether experimental or computational, the thermodynamic approach is able to provide the fundamental link between observations and numerical models and to reconcile micro- and macroscopic phenomena in an integrated view grounded on the basic principles of quantum and statistical physics. This session, organized as recognition to the outstanding scientific and academic career of Giulio Ottonello, aims at gathering contributions in the broad field of geochemical thermodynamics to give an overview of past and current thermodynamic research, discuss future perspectives and address the most relevant challenges in the field. The scientific program will include a plenary lecture given by Giulio along with a number of invited talks by renowned scientists, but it is also open to any contribution dealing with the geochemistry and cosmochemistry of natural or model systems, considered from a thermodynamic perspective. A specific focus will be devoted to the most recent developments in thermodynamics of crystalline solids and liquids, phase stability problems, ab initio calculations and phase diagram simulation, melting and solid-melt-gas phase equilibria at ambient and non-ambient conditions. Contributions on these topics by young researchers and early-career scientists are strongly encouraged.
- ISOTOPE GEOCHEMISTRY
Convener: Enrico Cannaò (UNIMI), Luigi Dallai (UNIROMA), Barbara Nisi (CNR-IGG)
Plenarist: Giovanni Chiodini (INGV-Bologna)
Invited Speaker: Eleonora Regattieri (CNR-IGG Pisa)
Isotope Geochemistry is increasingly being used in scientific investigations, from the study of the isotopic fingerprints of rocks and soils (i.e., bulk analyses) to the study of the isotopic variations at high-spatial resolution (e.g., in-situ techniques). The development of high-performance instruments allows for a better understanding of the geological processes governing our planet, by using traditional and non-traditional stable isotopic systematics as well as radiogenic isotopic ones. Particularly relevant are the isotopic geochemical studies concerning the interaction between humans and the environment impacting to their co-evolution at the short- to medium- timescales. This session is aimed at those scientific contributions that have isotopes as the main focus. Presentations of new analytical techniques and methodological/experimental approaches are welcome as well as those including the use of traditional and non-traditional stable and radiogenic isotopes aimed to unravel geological processes. Particular attention will also be given to studies aimed at specific isotope investigations applied to the solid Earth, the environment, paleoclimatic reconstructions, food traceability, cultural heritage and forensic aspects.
- ENVIRONMENTAL GEOCHEMISTRY
Convener: Carmine Apollaro (UNICAL) – Rosa Cidu (UNICA) – Elisa Sacchi (UNIPV)
Plenarist: Riccardo Petrini (DST– University of Pisa)
Invited Speaker: Roberta Parigi (University of Waterloo)
The environmental geochemistry session is concerned with the sources, distribution and interactions of chemical elements in solid (rocks, soils), liquid (surface and groundwater), gaseous (atmosphere) and biological materials. This wide range of substances and compartments is studied with a broad suite of analytical tools, from field measurements, to laboratory assessments to digital modelling methods. Nowadays, the geochemical expertise is crucial to the environmental remediation sector, that has grown rapidly in the last decades. Only a sound geochemical assessment can warrant a sustainable environmental management, from resources exploitation to pollution remediation. The session is devoted to the many aspects of environmental geochemistry, with a particular focus on: 1) the criteria for determining pollution levels as a function of the environmental and geochemical constrains; 2) new approaches to assess the risk of diseases of geochemical nature in different areas; 3) geochemical mapping and data interpolation techniques to delimit the risk zones, where negative health effects due to deficiency or excess of certain chemical elements or compounds are likely to occur.
- FLUID GEOCHEMISTRY IN GEOTHERMAL AND VOLCANIC ENVIRONMENTS
Convener: Kyriaki Daskalopoulou (University of Potsdam) – Francesco Frondini (UNIPG) – Giancarlo Tamburello (INGV)
Plenarist: Alessandro Aiuppa (DISTEM – University of Palermo)
Invited Speaker: Gianluigi Ortenzi (Freie Universität Berlin)
Terrestrial fluids released from various tectonic settings can differ in their geochemical characteristics due to a variable range of pressure and temperature and degree of interaction with the surrounding environment. These fluids are linked to seismic, volcanic, and geothermal activities and carry essential information that contributes to understanding the volcano-tectonic environments from where they are originated. Fluids also play an integral role in Earth degassing and controlling the surface chemistry and climate of Earth. Thus, their study can provide insights on the geochemical cycles at a historical time scale and examine their possible impact on global climate changes. This session welcomes contributions focused on fluid geochemistry that discuss novel sampling and measuring techniques, direct and remote ground- and space-based observations, and modelling studies. Our goal is to provide new insights into volcanic, tectonic and atmospheric processes at local and global scales.