Séminaire ISTerre
Defining pathfinders for hydrogen exploration
jeudi 13 mars 2025 - 11h00
L. Truche, B. Malvoisin - ISTerre---
Hydrogen (H2) plays a central role in the abiotic synthesis of simple organic compounds and in supporting deep microbial communities. Furthermore, deep crustal production of H2 now represent an emerging topic of exploration because this molecule may contribute to the accumulation of potentially extractable energy resources in geological environments that have not been previously targeted by the oil and gas industry. Thus, defining exploration pathfinders and constraining H2 flux from sources to seeps is key to understanding the geologic hydrogen resource potential. The high mobility of hydrogen combined with its high reactivity, both at high and low temperatures, are supposed to prevent its accumulation in the subsurface or its concentration in geological fluids except in rare occurrences. However, this paradigm is now shifted by the recent discoveries of geological environments suitable for hydrogen trapping and of several continental zones where natural hydrogen is released. It now appears necessary to methodically and reasonably evaluate the sources, sinks, flows and stocks of this potential primary natural production. Even if the phenomena controlling the generation (redox reactions, radiolysis, fermentation), migration (solubility, clathrates, diffusion, adsorption) and reactivity (microbial or surface catalysis) of H2 in the Earth's crust are now quite well understood, their interplays remain to be unraveled. We will show how some recent observations made at ISterre from the nanoscale up to the basin scale using experimental, numerical and field approaches can provide new insights into the hydrogen system. We will then highlight the potential of some H2-fertile areas recently explored by our research group in Grenoble.
Equipe organisatrice : Organisation labo
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
“Minimalist seismology”: studying earthquakes with sparse instrumentation
jeudi 17 septembre 2026 - 11h00
Mathieu Causse - ISTerre
Equipe organisatrice : Organisation labo
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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Stable‑to‑dynamic expansion of fault slipping area through fluid injection observed in laboratory experiments using a sub‑meter scale specimen
vendredi 18 septembre 2026 - 14h00
Takatoshi Ito - Université de Tohoku, Japan
Equipe organisatrice : Mécanique des failles
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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Tectonics, Mantle Dynamics and Coupled Lithosphere-Mantle-Core Evolution of Earth and Other Rocky Worlds
jeudi 24 septembre 2026 - 11h00
Paul Tackley - ETH Zurich
Equipe organisatrice : Grands Séminaires ISTerre
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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Tectonics, Mantle Dynamics and Coupled Lithosphere-Mantle-Core Evolution of Earth and Other Rocky Worlds
jeudi 24 septembre 2026 - 11h00
Paul Tackley - ETH Zurich
Equipe organisatrice : Grands Séminaires ISTerre
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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Apport des expériences analogiques pour la modélisation et le suivi en temps réel de la propagation du magma en profondeur : Exemple du Rift Est Africain
jeudi 1er octobre 2026 - 11h00
Virginie Pinel - ISTerre
Equipe organisatrice : Organisation labo
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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A t-on encore besoin de plaques pour expliquer la tectonique de la vallée du Rhône et des Alpes Occidentales ?
vendredi 2 octobre 2026 - 11h00
philippe VERNANT - Geosciences Montpellier
Equipe organisatrice : Tectonique active et sismicité
Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères
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TBA
vendredi 2 octobre 2026 - 14h00
Hugo Boulze -
Equipe organisatrice : Cycle sismique et déformations transitoires
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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TBA
vendredi 9 octobre 2026 - 11h00
Eric Beaucé - ISTerre
Equipe organisatrice : Cycle sismique et déformations transitoires
Salle Dolomieu, Maison des Géosciences, 38400 Saint Martin d'Hères
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TBA
vendredi 20 novembre 2026 - 11h00
Farzaneh Mohammadi - ENS Paris
Equipe organisatrice : Cycle sismique et déformations transitoires
Amphithéâtre Killian, Maison des Géosciences, 38400 Saint Martin d'Hères
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