Spain Approves Mantle8 Natural Hydrogen Exploration in Navarra and Basque Country
The Spanish government has approved Mantle8’s application to explore natural hydrogen in the Navarra and Basque Country regions, marking a significant step in the country’s renewable energy strategy, according to the Ministry of Energy, Consumption, and Climate Action. The project, which involves drilling in geologically active zones, aims to assess the viability of extracting hydrogen from deep underground sources, a process known as natural hydrogen production.
What Is Natural Hydrogen and Why Does It Matter?
Natural hydrogen, also referred to as “white hydrogen,” is produced through geological processes rather than fossil fuel-based methods. Unlike green hydrogen, which requires renewable energy for electrolysis, natural hydrogen exists in underground reservoirs and can be extracted with lower carbon emissions. The European Commission has identified natural hydrogen as a potential cornerstone of the continent’s decarbonization efforts, with Spain’s Iberian Peninsula considered a high-potential region due to its tectonic activity.

According to a 2023 report by the International Energy Agency (IEA), natural hydrogen could provide a scalable, low-cost alternative to traditional hydrogen production. Spain’s approval of Mantle8’s project aligns with broader EU goals to diversify hydrogen sources, as outlined in the European Hydrogen Strategy.
Who Is Mantle8 and What Are Its Plans?
Mantle8, a UK-based energy company, has positioned itself as a leader in natural hydrogen exploration. The firm’s CEO, Chris Roberts, stated in a press release that the Navarra and Basque Country projects could unlock “hundreds of millions of cubic meters of hydrogen” if commercial viability is confirmed. The company has previously conducted exploration in France and Portugal, with pilot sites in the Massif Central and Alentejo regions.

The Spanish project will involve initial drilling at two sites, with results expected by late 2024. If successful, Mantle8 plans to collaborate with local energy firms to develop infrastructure for hydrogen transportation and storage, according to a Reuters report.
How Does This Fit Into Spain’s Energy Transition?
Spain has set a target to produce 10 million tons of green hydrogen annually by 2030, but natural hydrogen could complement these efforts by reducing reliance on solar and wind-powered electrolysis. The Basque Country, a hub for industrial activity, is particularly interested in hydrogen as a feedstock for steel production and transportation, per a Energy and Environment News analysis.
Local officials in Navarra have emphasized the project’s potential to create jobs and attract investment. “This is a win for innovation and sustainability,” said Navarra’s Minister of Industry, María Teresa Ibáñez, in a statement. However, environmental groups have called for stricter oversight to prevent groundwater contamination, a concern raised by the Spanish Association of Environmental Law (AEDEN).
What Are the Next Steps for the Project?
Mantle8’s exploration phase will last 18 months, with the first drilling operations scheduled to begin in early 2024. The company has pledged to publish all findings publicly, as required by Spain’s Energy and Climate Law. If the initial tests confirm high hydrogen concentrations, the next stage would involve pilot production and partnerships with utilities like Iberdrola or Repsol.

Regulatory hurdles remain, including compliance with the EU’s Sustainable Finance Disclosure Regulation (SFDR), which mandates transparency on environmental impacts. A Bloomberg report noted that Spain’s legal framework for natural hydrogen is still evolving, with no standardized guidelines for extraction or emissions reporting.
Why This Matters for the Global Hydrogen Market
The approval of Mantle8’s project could influence other EU nations to accelerate natural hydrogen exploration. France, for example, has already launched a national hydrogen mapping initiative, while Portugal is evaluating similar projects in the Algarve region. If Spain’s efforts succeed, it could position the country as a leader in a sector projected to reach $2.5 trillion by 2050, according to a McKinsey analysis.
However, experts caution that natural hydrogen is not a silver bullet. The IEA has warned that extraction methods must be carefully managed to avoid depleting underground reserves or causing seismic risks. “This is an