White Hydrogen Beneath the Alps and Pyrenees: Why Mountain Geology Could Reshape the Hydrogen Economy
For a century, hydrogen has been something humanity manufactures. Refineries and fertilizer plants make it from natural gas, and the new generation of electrolyzers makes it from water and electricity. Research now suggests the planet has been making hydrogen on its own all along, and that some of the best places to look for it may sit beneath two of Europe's most famous mountain ranges. A September 30, 2026 feature in Futura-Sciences drew renewed attention to this idea, describing natural or "white" hydrogen as an energy treasure whose true potential remains largely unknown (Futura Team, 2026).
The science behind the headline comes from a study published in the Journal of Geophysical Research: Solid Earth by Frank Zwaan and colleagues at the GFZ Helmholtz Centre for Geosciences (Zwaan et al., 2026). The team used numerical models to simulate how mountain belts form when ancient rift basins are squeezed back together. In these rift inversion orogens, slices of iron rich mantle rock called peridotite can be pushed toward the surface. When that rock meets circulating water at the right temperatures, a reaction called serpentinization oxidizes the iron and releases hydrogen gas.
The new insight concerns erosion. The models show that moderate erosion helps by continuously stripping away surface material, which allows mantle rocks to rise into what researchers describe as the serpentinization window. Too much erosion, however, can destroy the reservoir rocks that would trap the gas or shift the temperature conditions out of the productive range. Zwaan summarized the finding, calling erosion "a key and ambivalent factor in natural hydrogen production" (GFZ Helmholtz Centre for Geosciences, 2026). The study also found that the length of the rifting phase before mountain building shapes how much hydrogen potential a range can develop. Based on these results, the authors identified the Pyrenees as especially favorable and the Alps as another significant target for exploration.
Mountains are not the only candidates. The Futura-Sciences report pointed to deep drilling in France's Lorraine region, where high concentrations of natural hydrogen suggest one of Europe's largest potential reservoirs (Futura Team, 2026). In Mali, a well at Bourakébougou has supplied hydrogen rich gas to generate electricity for a local village, the world's first working example of natural hydrogen production (Prinzhofer et al., 2018). Exploration programs are also forming in Morocco, Namibia, and South Africa.
Canada offers a different geological pathway. Barbara Sherwood Lollar and colleagues at the University of Toronto published a decade long record in the Proceedings of the National Academy of Sciences showing that boreholes in a deep mine near Timmins, Ontario release hydrogen continuously for more than ten years (Sherwood Lollar et al., 2026). Each borehole discharges roughly 8 kilograms per year, and the roughly 15,000 boreholes at the site could together yield more than 140 tonnes annually, enough energy for over 400 households (University of Toronto, 2026). In these ancient Canadian Shield rocks, hydrogen forms through water rock reactions and radiolysis, in which natural radioactive decay splits water molecules. Sherwood Lollar described it as a "made in Canada" resource that could support local and regional industrial hubs.
So what does this mean for the hydrogen economy? The first implication is cost. Today, most hydrogen comes from steam methane reforming, which emits carbon dioxide, while green hydrogen from electrolysis remains expensive because it depends on large quantities of renewable power and costly equipment. A natural reservoir flips that equation. The energy has already been invested by geology, so producers would pay mainly for drilling, gas separation, and compression. If even a modest share of natural accumulations prove recoverable, white hydrogen could undercut both gray and green supply in regions where it occurs.
The second implication is scale. A U.S. Geological Survey model estimated that the subsurface may hold on the order of trillions of tonnes of hydrogen, and that recovering only a small fraction could meet projected global demand for centuries (Ellis & Gelman, 2024). The key uncertainty is how much of that hydrogen sits in accessible, concentrated traps. Studies like the GFZ work matter because they narrow the search from entire continents to specific geological settings, which lowers exploration risk and the cost of capital for early projects.
The third implication is geopolitical. Europe has spent years building import corridors for green hydrogen and ammonia from North Africa, the Middle East, and beyond. Domestic white hydrogen in the Pyrenees, the Alps, or Lorraine would add a home grown supply option that strengthens energy security. The Canadian findings show a similar logic, with mines that already have roads, power, and permits potentially doubling as hydrogen sources near existing industrial users. This is where the hydrogen economy has struggled most, since matching production with nearby offtakers has proven harder than building the production itself.
Caution is still warranted. Natural hydrogen is a small, reactive molecule that migrates easily, microbes consume it underground, and the industry lacks the long production histories that give investors confidence in oil and gas fields. Regulatory frameworks for licensing hydrogen exploration are still being written in many countries, and mountainous terrain raises obvious environmental and permitting challenges. If geologists can map where the Earth makes and keeps hydrogen, the industry gains a cheaper, cleaner, and more local source of the molecule at the center of its business case. The next step is drilling, and the evidence says it is worth it.
References
Ellis, G. S., & Gelman, S. E. (2024). Model predictions of global geologic hydrogen resources. Science Advances, 10(50), eado0955. https://doi.org/10.1126/sciadv.ado0955
Futura Team. (2026, September 30). A hidden energy "treasure" under the Alps and Pyrenees? Scientists stunned. Futura-Sciences. https://www.futura-sciences.com/en/a-hidden-energy-treasure-under-the-alps-and-pyrenees-scientists-stunned_39630/
GFZ Helmholtz Centre for Geosciences. (2026, May). New study links erosion to natural hydrogen potential in mountain ranges [Press release]. EurekAlert! https://www.eurekalert.org/news-releases/1127699
Prinzhofer, A., Tahara Cissé, C. S., & Diallo, A. B. (2018). Discovery of a large accumulation of natural hydrogen in Bourakebougou (Mali). International Journal of Hydrogen Energy, 43(42), 19315–19326. https://doi.org/10.1016/j.ijhydene.2018.08.193
Sherwood Lollar, B., Warr, O., et al. (2026). Decadal record of continental H2 reservoirs reveals potential for subsurface microbial life and natural H2 exploration. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2603895123
University of Toronto. (2026, May 18). White hydrogen discovered in billion-year-old Canadian Shield rock [Press release]. EurekAlert! https://www.eurekalert.org/news-releases/1128340
Zwaan, F., Glerum, A. C., Brune, S., Vasey, D. A., Naliboff, J. B., Manatschal, G., & Gaucher, E. C. (2026). The impact of erosion efficiency on rift-inversion orogen evolution: Implications for serpentinization-derived natural H2 resources. Journal of Geophysical Research: Solid Earth. https://doi.org/10.1029/2025JB033255
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