7-7-7-7-7-7-7-7-7-7-7-7-7-7 From: Alexandra Kushnir <alexandra.kushnir@xxxxxxx> Dear colleagues, We would like to invite submissions to the *Hydrothermal Alteration in Volcanic Systems* session at the upcoming IAVCEI Scientific Assembly, taking place 29 June to 4 July 2025 in Geneva, Switzerland. *Description: *Volcanic hydrothermal systems are a playground for complex fluid-rock interactions, resulting in alteration that can significantly influence the evolution of these systems over time. Indeed, hydrothermal systems play a critical role in volcanic hazards: alteration can reduce the strength of edifice-forming rocks, contributing to volcano spreading and flank collapse and the high pore pressures that develop within hydrothermal systems can promote phreatic/phreatomagmatic explosions. However, hydrothermal systems can also be economically critical: they are often harnessed to produce energy and can be home to minerals of economic interest. We invite diverse contributions dedicated to the characterisation, imaging, monitoring, and hazard/economic assessment of volcanic hydrothermal systems and associated fluid-rock interactions. We welcome contributions based on any subdiscipline (e.g., geology, geophysics, geochemistry, engineering) and using any technique or method (e.g., geological mapping, magnetic, gravity, and spectroscopic methods, laboratory experiments, gas monitoring, numerical modelling). *Conveners:* Alexandra Kushnir (Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne Switzerland) Claire Harnett (University College Dublin (UCD), Dublin, Ireland) Marina Rosas Carbajal (Institute de Physique du Globe de Paris (IPGP), Paris, France) *(Extended) Abstract submission deadline: *10 January 2025 *Submit your abstract here: * https://on-line-form.eu/iavcei2025sa/abstracts/index.php?coo=1 <https://urldefense.com/v3/__https://on-line-form.eu/iavcei2025sa/abstracts/index.php?coo=1__;!!IKRxdwAv5BmarQ!fNxiY6UN95i2VyIG8sR1kRsLChs_VV905eVMSKyx6gFwJ8l7ZDKm6cdsfOANfhmBM1tChdf0MdI0yY-fK7nHuPDrfw$> We look froward to seeing you at IAVCEI 2025! Alexandra, Claire, and Marina 7-7-7-7-7-7-7-7-7-7-7-7-7-7 ------------------------------