Prehistoric mine of Sa Mitja Lluna

A ground-penetrating radar (GPR) survey was carried out at the prehistoric mining site of Sa Mitja Lluna on Illa d'en Colom, off the coast of Menorca. The site lies within a geologically distinctive area dominated by Carboniferous siliciclastic turbidites, whose mineral-rich ravines contain copper sulphides and related ores that formed the basis for prehistoric extraction.

Archaeological excavations have uncovered stone tools, pottery, and massive mining hammers, demonstrating a highly organised approach to copper production. Radiocarbon dating confirms that Sa Mitja Lluna functioned as an important mining centre between 1700 BC and 900 BC. A large trench running parallel to an ore vein indicates more intensive exploitation than previously assumed.

The GPR survey identified subsurface stone alignments and filled features likely connected to mining activities. Together with ongoing excavations, these results provide valuable insight into prehistoric mining technology and daily life, making Sa Mitja Lluna a key site for understanding early metallurgy in the western Mediterranean.