Rio Tinto (river) - History

History

The ore body was deposited in the Carboniferous (300-350 Ma) by hydrothermal activities on the sea floor. The river area has a history of mining activity since the Tartessans and the Iberians started mining in 3000 BCE. The mining continued over the Phoenician era and under the Roman Empire until the second part of the 15th century: primarily for copper but also for iron and manganese. In the nineteenth century the mining operation started in large scale mainly by mining companies from the United Kingdom. After the peak of production in 1930 production declined and ended for copper mining in 1986 and for silver and gold in 1996. The mine closed in 2001. Increased copper prices in the 2010s led to efforts by EMED Mining to reopen the mine, but difficulties in acquiring all property rights necessary, environmental concerns, and obtaining regulatory approval delayed reopening. The mine, which employed as many as 20,000 in the past, would employ 350 people during its startup phase. The firm acquired $250 million in financing for the project. Environmental concerns are centered on disused water reservoirs which might not be able to withstand the stress of renewed waste inputs.