https://www.artsci.utoronto.ca/news/white-hydrogen-discovery-canadian-shield-could-unlock-new-energy-source
May 21, 2026 by Sean Bettam - A&S News
Hydrogen gas is steadily building up within the Canadian Shield among some of the oldest rocks on Earth. Now, geochemists at the University of Toronto and the University of Ottawa have measured its presence, mapped its concentration and tracked its long-term accumulation at a single location, shedding light on this source of natural, or “white,” hydrogen.
The findings make it possible to assess the economic viability of this emerging energy source and point to a new approach to hydrogen exploration — one that could accelerate greenhouse gas reductions and expand hydrogen’s role in the clean energy transition.
A
study published in the Proceedings of the National Academy of Sciences reports measurements of hydrogen directly observed discharging from the vast billion-year-old rocks of the Canadian Shield. Using data from an operating mine near Timmins, Ont. the researchers say that boreholes at the site release an average of 0.008 tonnes of hydrogen per year — approximately 8 kilograms, the weight of an average-sized car battery — and can continue to do so for 10 years or more.
Extrapolating to the site’s nearly 15,000 boreholes results in a total discharge of more than 140 tonnes of hydrogen per year. Such discharges could provide 4.7 million kilowatts of energy per year from a single location — enough to support the annual energy needs of over 400 households.
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B. Sherwood Lollar, & O. Warr, Decadal record of continental H2 reservoirs reveals potential for subsurface microbial life and natural H₂ exploration,
Proc. Natl. Acad. Sci. U.S.A. 123 (21) e2603895123,
https://doi.org/10.1073/pnas.2603895123 (2026).
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