Chrystel Dezayes, a researcher at the French Geological Survey (BRGM), has been leading a study to explore the deep geothermal potential of Petite-Terre Island in Mayotte, an overseas department of France. The research aims to diversify Mayotte’s electricity supply, which currently relies heavily on diesel thermal production, with a small contribution from photovoltaic energy.
The study builds upon previous research that indicated a strong geothermal potential under Petite-Terre. Dezayes and her team conducted a series of geophysical measurements, fracture analyses, and studies of gas emanations from the ground between 2021 and 2022. These data were analyzed alongside information gathered from monitoring the significant seismo-volcanic activity observed off the coast of Mayotte since May 2018.
The research resulted in a detailed 3D geological model of Petite-Terre’s subsurface structure and a hydrothermal model of the geothermal system. These models are designed to identify the most favorable zones for geothermal exploitation, potentially offering a sustainable and renewable energy source for the island.
For the energy sector, this research highlights the potential for deep geothermal energy to contribute to the diversification of electricity supply in remote or isolated regions. Geothermal energy can provide a stable and reliable baseload power, complementing intermittent renewable energy sources like solar and wind. The practical application of this research could lead to the development of geothermal power plants in Mayotte, reducing the island’s dependence on diesel and lowering its carbon footprint.
The study was published in the journal “Geothermics,” a publication that focuses on geothermal energy research and its applications. The research provides a valuable case study for other regions looking to explore and develop their geothermal potential, contributing to the global transition towards cleaner and more sustainable energy sources.
This article is based on research available at arXiv.