The European Mineralogical Union Medallist Lecture for 2023 will be given by Dr José Alberto Padrón Navarta on Friday 15th November at 3.00 pm (central European time). [José Alberto Padrón-Navarta] Redox Influences on Fluid Dynamics and Dehydration Processes in Subduction Zones Dehydration reactions in subducting slabs control volatile transport and trigger chemical and mechanical instabilities in subduction zones. These reactions, particularly in serpentinites, release large volumes of fluids over a narrow temperature range. While conceptually straightforward thermodynamically, these reactions involve poorly constrained dynamic parameters under natural conditions, including kinetics, porosity, permeability, strain rates, and differential stresses, leading to multidisciplinary research. Oxygen fugacity (fO2) changes are often overlooked in these processes, as it's traditionally believed that fO2 is invariably controlled internally by the mineral assemblage. However, external fluids can significantly alter fO2 under specific conditions. Examples from paleo-subduction zones show how external fluids can modulate fO2, catalyze dehydration, and influence redox-sensitive elements like sulfur, with implications for chemical recycling and deep redox dynamics. The lecture will be hosted by Prof. Diego Gatta, vice-President of the EMU. This is an online-only event and can be joined, free of charge, by registering here: https://zoom.us/meeting/register/tJckcOmsqzgrE9QWQm_BPPZ4CRKYVq8wXUVw<https://urldefense.proofpoint.com/v2/url?u=https-3A__zoom.us_meeting_register_tJckcOmsqzgrE9QWQm-5FBPPZ4CRKYVq8wXUVw&d=DwMDaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=c6ktTdxEOovPagytu-FebUIWcQ00m5UZLPxE-HPkkzo&m=5AUugy8VgLakBwkn31wJ6r_gdAZY8TPvy1mq4ddbeRwCkaUWZOpsglOSJNvbYDwu&s=pR1WgsdYhEzm1rgapih-Wqds6cHizAPBQfFZGonZHGQ&e=> ________________________________ This email has been scanned for spam and viruses. Click here<https://spambrella.cloud-protect.net/app/report_spam.php?mod_id=11&mod_option=logitem&report=1&type=easyspam&k=k1&payload=53616c7465645f5f4fe3273d4cb82db3bb7cdd2cdc0dcffc33a19014cdb76dc516eb60d5833e689d1c141498db51dda075af73daa69b64cdd96325fbd95e421844fd43e1e1d7afe4b8fd44fee132c0dae23ee993a567516c797f4809f43cba9da8094f471b0b986fdb7007d9e14b1e97aa7175903c9f294320df18756f9319d8c1721af75b9f3c1996c25974f42ecfa2> to report this email as spam.