Explanipedia

Natural Hydrogen Generation from Phanerozoic Sedimentary Siderite Open

Isabelle Moretti, Jérémie Ammouïal, Nicolas Bouton · 2025

Siderite (FeCO3) is an iron carbonate present in Archean and Neoproterozoic Banded Iron Formations (BIFs) as well as in much more recent sedimentary basins. Due to its high iron content, it could be part of H2 systems, and we have quantifi…

Global-scale AI-powered prediction of hydrogen seeps Open

Vincent Roche, Jimmy Daynac, Sofyane Hesni, Ugo Geymond, Н.И. Гинзбург , et al. · 2025

Low‐Temperature (100°C–300°C) Magnetite Production in Variably Serpentinized Lherzolites Open

Keanu Loiseau, Charles Aubourg, Pierre Camps, Guilhem Hoareau, Claire Carvallo , et al. · 2025

The study of the serpentinization process in ultramafic rocks has been revived in recent years in response to the problems of natural hydrogen generation. Serpentinization results in the formation of magnetite, which is often observed in t…

Geological and geochemical approach to natural hydrogen exploration in the Northern Apennines, Italy Open

Vivian Azor de Freitas, Alessandra Montanini, Isabelle Moretti, Andrea Artoni, Stefano Segadelli , et al. · 2025

International audience

Concomitant generation of hydrogen during carbon dioxide storage in ultramafic massifs- state of the art with implications to decarbonization strategies Open

Mahmoud Leila, Randy Hazlett, P.M. George, Isabelle Moretti, Zhaksylyk Kabashev , et al. · 2025

Key strategies to mitigate the detrimental effects of climate change include a rapid transition to green, zero-carbon energy sources coupled with geological storage of CO₂. Mineral trapping of CO₂ recently emerged as one of the most effici…

H2 Transport in Sedimentary Basin Open

Luisa Nicoletti, Juan Carlos Hidalgo, Dariusz Strąpoć, Isabelle Moretti · 2025

Natural hydrogen is generated by fairly deep processes and/or in low-permeability rocks. In such contexts, fluids circulate mainly through the network of faults and fractures. However, hydrogen flows from these hydrogen-generating layers c…

Mössbauer spectroscopy: a key tool to quantify Fe-speciation and distribution in H2-generating rocks Open

Ugo Geymond, Keanu Loiseau, Vincent Roche, G. Pasquet, Sidonie Révillon , et al. · 2025

Natural Hydrogen in Uruguay: Catalog of H2-Generating Rocks, Prospective Exploration Areas, and Potential Systems Open

Marcos Sequeira, Ethel Morales, Isabelle Moretti, Gerardo Veroslavsky, Facundo Plenc , et al. · 2025

The increasing demand for carbon-free energy in recent years has positioned hydrogen as a viable option. However, its current production remains largely dependent on carbon-emitting sources. In this context, natural hydrogen, generated thr…

Radiolysis and Fe-Biotite Alteration: Questioning the Origin of H2-Bearing Fluid Inclusions in the Yorke Peninsula Granites, South Australia Open

Ugo Geymond, Dan Lévy, Julien Bourdet, Isabelle Martínez, O.J. Sissmann , et al. · 2025

Natural H2 Transfer in Soil: Insights from Soil Gas Measurements at Varying Depths Open

Cesar Patiño, Dora Piedrahita, Elkin Colorado, Katherine Aristizabal, Isabelle Moretti · 2024

The exploration of natural H2 is beginning in several countries. One of the most widely used methods for detecting promising areas is to measure the H2 percentage of the air contained in soils. All data show temporal and spatial variabilit…

The H2 potential of the Colombian coals in natural conditions Open

Isabelle Moretti, Nicolas Bouton, Jérémie Ammouïal, A. Ramirez · 2024

A new continental hydrogen play in Damara Belt (Namibia) Open

Vincent Roche, Ugo Geymond, Molly Boka-Mene, N. Delcourt, Éric Portier , et al. · 2024

Natural Hydrogen in the northern Semail Ophiolite: A case study in the Emirate of Ras Al Khaimah, UAE Open

Gabriel Pasquet, Keanu Loiseau, Mohamed Diatta, Giacomo Firpo, P. H. Swire , et al. · 2024

Natural hydrogen system evaluation in the São Francisco Basin (Brazil) Open

Vivian Azor de Freitas, Alain Prinzhofer, J.B.L. Françolin, Francisco José Fonseca Ferreira, Isabelle Moretti · 2024

The São Francisco Basin (SFB), a double foreland bordered by two Neoproterozoic belts, hosts a proven hydrogen (H 2 ) system, demonstrated by high concentrations in boreholes and numerous surface H 2 emissions, some long-term monitored. Ho…

Water budget in flat vs. steep subduction: implication for volcanism and potential for H2 production Open

Alexis Gauthier, Tiphaine Larvet, Laëtitia Le Pourhiet, Isabelle Moretti · 2024

In this study, we model the processes of (de)hydration and melting within subduction zones using a thermo-mechanical modeling approach. Multiple 2D simulations are conducted to investigate how the subduction angle influences the water budg…

Natural H2 Emissions in Colombian Ophiolites: First Findings Open

A. Ramirez, Felipe González Penagos, Germán Santos Flor Rodríguez, Isabelle Moretti · 2023

The exploration of natural H2 or white hydrogen has started in various geological settings. Ophiolitic nappes are already recognized as one of the promising contexts. In South America, the only data available so far concerns the Archean ir…

Environnement et construction à Delphes. Observations préliminaires (2022) Open

Amélie Perrier, Christian Gorini, Isabelle Moretti, Luigi Piccardi, Valérie Plagnes , et al. · 2023

Chroniques de l’EFA :La pierre à Delphes 2022La pierre à Delphes 2021 Approche géologique et hydrogéologique des risques environnementaux affectant la construction à Delphes Lors des programmes de recherche précédents, sur l’eau à Delphes …

Editorial: Natural hydrogen in different contexts: geological, cosmochemical, and biological Open

Mahmoud Leila, Ahmed A. Radwan, Mohammad A. Abdelwahhab, Isabelle Moretti · 2023

EDITORIAL article Front. Earth Sci., 12 October 2023Sec. Geochemistry Volume 11 - 2023 | https://doi.org/10.3389/feart.2023.1296646

Natural hydrogen seeps or salt lakes: how to make a difference? Grass Patch example, Western Australia Open

Léo Aimar, E.A. Frery, Julian Strand, Charles Heath, Shahbaz Khan , et al. · 2023

Natural hydrogen exploration is picking up around the world while the geogenic hydrogen system is still a Frontier science. Natural hydrogen seepage can occur in the form of a sub-circular surface feature named by some authors “fairy circl…

The place of natural hydrogen in the energy transition: A position paper Open

Éric C. Gaucher, Isabelle Moretti, Nicolas Pélissier, Glen Burridge, Nicolas Gonthier · 2023

Natural Hydrogen is a new, clean and low-carbon source of hydrogen that is produced by the Earth, and can migrate and accumulate in geological reservoirs. Its exploration has begun in many countries and its price could be significantly low…

Reassessing the role of magnetite during natural hydrogen generation Open

Ugo Geymond, Théo Briolet, Valentine Combaudon, O.J. Sissmann, Isabelle Martínez , et al. · 2023

Interactions between water and ferrous rocks are known to generate natural H 2 in oceanic and continental domains via the oxidation of iron. Such generation has been mainly investigated through the alteration of Fe 2+ -silicate and some Fe…

Subduction and Hydrogen Release: The Case of Bolivian Altiplano Open

Isabelle Moretti, Patrice Baby, Paola Alvarez Zapata, Rosmar Villegas Mendoza · 2023

Natural hydrogen is known to be generated in the crust by water/rock interactions, especially the oxidation of iron-rich rock or radiolysis. However, other sources, especially deeper ones, exist. In the context of subduction, the dehydrati…

Early onshore basaltic alteration and its natural hydrogen potential in the Asal–Ghoubbet rift, Republic of Djibouti. Open

Gabriel Pasquet, Mathieu Duttine, Isabelle Moretti · 2023

The East African Rift (EAR) is a large opening system that allows the observation of all stages of rift evolution from continental opening in the south to oceanization in the north (Ethiopia-Djibouti). Also, the Asal–Ghoubbet active …

Can clumped isotopes help us constrain the origin of H2? Open

Dan Lévy, Pierre Cartigny, Jabrane Labidi, Isabelle Martínez, Isabelle Moretti , et al. · 2023

Dihydrogen (H 2 ) is becoming a key molecule for the energy transition.Many processes can lead to the formation of H 2 such as methane reforming, water electrolysis in the industry or hydrothermal alteration, radiolysis, volcanism and micr…

Natural H2 exploration: tools and workflows to characterize a play Open

Dan Lévy, Vincent Roche, Gabriel Pasquet, Valentine Combaudon, Ugo Geymond , et al. · 2023

Natural dihydrogen (H 2 ) exploration is now active in various countries, but tools and workflows that help to characterize prospective zones are still poorly defined. This review paper is dedicated to share our experience in characterizin…

Natural hydrogen potential and basaltic alteration in the Asal–Ghoubbet rift, Republic of Djibouti Open

Gabriel Pasquet, Amin Mohamed Idriss, Lou Ronjon-Magand, Magali Ranchou‐Peyruse, Marion Guignard , et al. · 2023

The Asal–Ghoubbet active rift in the Republic of Djibouti is a site of interest for geothermal energy and natural hydrogen, and previous studies have indicated that dihydrogen (H 2 ) emanates from this rift. However, the well-known serpent…

Diversité des pierres dans la construction grecque antique : une approche géologique et statistique appliquée à des sites archéologiques du Golfe de Corinthe, Grèce Open

Marilou de Vals, Isabelle Moretti · 2023

Cette étude est une comparaison de l’usage de la pierre dans 34 sites archéologiques de la région du Golfe de Corinthe (Grèce), en activité entre le vie et le ier siècle avant J.-C. Dans chaque site, le nombre de faciès et les proportions …

Reassessing the role of magnetite during natural hydrogen generation Open

Isabelle Martínez, Ugo Geymond, Théo Briolet, Valentine Combaudon, O.J. Sissmann , et al. · 2023

La pierre à Delphes : matériaux et carrières (2021) Open

Amélie Perrier, Marilou de Vals, Isabelle Moretti, Luigi Piccardi, Tommy Vettor · 2022

L’exploration géo-archéologique de Delphes et de ses environs s’est poursuivie du 15 au 28 mai 2021 et du 25 au 29 octobre 2021 dans le cadre du programme quinquennal de l’EFA « La pierre à Délos et à Delphes ». Les lithologies de l’élévat…

Natural hydrogen emanations in Namibia: Field acquisition and vegetation indexes from multispectral satellite image analysis Open

Isabelle Moretti, Ugo Geymond, Gabriel Pasquet, Léo Aimar, Alain Rabaute · 2022

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