Island Nations Launch Ocean Survey to Assess Shared Resource Potential

Seychelles and Mauritius are moving to answer a question that has lingered over their shared waters for years: what, exactly, lies beneath nearly 400,000 square kilometres of ocean floor in the Mascarene Plateau region?

The two island nations have approved a new seismic survey to assess whether oil, gas, or mineral deposits exist in the Joint Management Area, a vast maritime zone they govern together. For citizens of both countries, the stakes are tangible. Understanding the hydrocarbon and mineral potential of the plateau could eventually support economic diversification and inform energy security planning across the region, offering governments a clearer basis for decisions that affect public finances and long-term development.

Additional reference context is available at https://www.zinfos974.com/les-seychelles-et-maurice-vont-explorer-le-potentiel-petrolier-gazier-et-mineral-du-plateau-des-mascareignes/.

The survey will be conducted by Viridien, a geophysical services company formerly known as Compagnie Générale de Géophysique Services. The work is framed as a preliminary assessment, not a step toward immediate extraction. Both governments have been explicit on this point: any future commercial development would require additional approvals and procedures well beyond this initial mapping phase.

Seychelles Vice-President Sébastien Pillay was direct during a government briefing. “We are far from that for the moment,” he said of any potential resource development. The immediate goal is to gather knowledge that could inform future decisions, not to commit either nation to drilling or mining.

That distinction matters. If the survey reveals promising prospects and a company expresses interest in deeper exploration, additional environmental and regulatory procedures would still need to be completed before any extraction could proceed. The seismic study is positioned as foundational research that opens possibilities rather than forecloses choices.

The Joint Management Area itself has a defined legal history. A 2011 decision by the United Nations Commission on the Limits of the Continental Shelf recognised the two countries’ shared jurisdiction over 396,000 square kilometres of seafloor and subsurface beyond their respective exclusive economic zones. Two treaties signed in 2012 formalised how Seychelles and Mauritius would manage the territory and any resources found within it, including how revenues from commercially viable discoveries would be shared.

By contrast, the path to this point has not been smooth. In 2017, Spectrum Geo was contracted to conduct a multiclient seismic survey over the same area, but that agreement ended in 2020 without delivering the expected results. In 2024, both nations renewed their commitment to exploring the JMA’s oil, gas, and mineral prospects. The new Viridien survey is intended to supply the additional data needed to determine whether continued exploration makes economic sense, according to reporting from zinfos974.com.

Previous research efforts in the area have not yielded the results hoped for. That history makes this round of data collection a critical step in determining whether the zone warrants further investment.

Once completed, the survey will generate information that can be offered to companies interested in the region’s prospects. Those firms can then decide whether to pursue more intensive exploration activities. Whether the data, this time, proves compelling enough to attract that interest remains the open question both governments are now paying to answer.