Secondary copper minerals from the "San Juan Bautista" concession, "San Valentín" open pit, Cartagena, Murcia, Spain

In the Sierra Minera of Cartagena-La Unión, the most abundant metal ores are iron, manganese, lead and zinc, with copper (and tin) minerals that appear only occasionally. The largest work was the “San Valentín” open pit. The works in the “San Valentin” open pit began in 1966. In March 1984, these works discovered a smalll section with ore that was mainly formed by iron oxides, with small amounts of secondary copper minerals, of aquality unknown so far in the mining district.