Tharsis-La Zarza mining basin

37°35′23.91″N 7°7′2″W The Tharsis-La Zarza mining basin, colloquially known as the Tharsis mines, is a Spanish mining area located in the province of Huelva. Its main centers are in the municipalities of Alosno, Calañas, Cerro de Andévalo and La Zarza-Perrunal.