There
are several bibliography references in ancient literature about
pyrite from La Rioja and Soria (Calderon, 1910), although no written
references to the Navajún locality. Valdeperillo, Ambasaguas,
Valdenegrillo, and many sites had been described as popular pyrite
outcrops, often with their own morphological shape.
Mountain
range of Alcarama
Badlands
next to Navajún
In 1965,
Pedro Ansorena Garret requested an exploration license. Following
research permission was granted, and in 1970 a mining exploitation
concession was granted, derived from the research permission. Since
then, the mine is being regularly exploited till today.