Titre: Imagerie des zones actives profondes par détermination du point de Curie Détecter les zones actives en profondeur est une nécessité mais aussi un challenge dans la compréhension des systèmes volcaniques au sens large. Imager la distribution des anomalies thermiques est dans ce sens fondamental pour caractériser l’évolution des zones de stockage, les modalités de transfert des magmas, et…
TITRE: Application of multiple sulfur isotopes in geochemistry. Résumé: The analysis of all four sulfur isotopes has the potential to provide information about reaction pathways that differentiate equilibrium from kinetic effects as well as provide information that can be used as tracers of geochemical processes. This talk will review the basic principles that control the nature…
Title : The Magic of Magma (Mush) Abstract: Magmatic systems are now understood be dominated by crystal-rich mushy conditions, yet the kinematics and dynamics of magma mush are poorly understood. They are not generally elastic media, nor a sponge, nor a dirty fluid, nor amenable to treatment as a simply-connected continuum. It is a loose…
Titre: Metamorphism at extreme conditions, what information can be gathered from monazite and zircon behaviour? https://youtu.be/gZ1kzfoT8J4 Résumé: Ultrahigh-temperature (UHT) and ultrahigh-pressure (UHP) metamorphic rocks have been recognized in a variety of geodynamic setting and are considered to play an important role in deciphering lithosphere evolution. Unravelling the evolution of such terrains in terms…
Sulfur in Igneous Systems: Solubility, Redox State and the Distribution of Chalcophile Elements The solubility of sulfur in silicate melts is a topic that has attracted the attention of; metallurgists interested in the conditions under which immiscible sulfide mattes segregate from silicate slags; glass scientists concerned with mitigating exsolution of sulfate phases in radioactive waste…
Bonjour à tous, Maud Boyet présentera le Géoch’Pot du 9 novembre 2018 à 11h30 en salle des séminaires. Elle nous parlera de "Ce mystérieux composant pélagique recyclé dans les points chauds: étude du système La-Ce dans l’île de Gough". En espérant vous voir nombreux. Martin