Preliminary study of the Serrana Segunda copper mine (Gallinero de Cameros, La Rioja).
- José Manuel Hernández Marchena
- Samuel Noval Ruiz
- Victor Ingelmo Ollero
- Ascensión Murciego Murciego
- Esther Álvarez Ayuso
ISSN: 1885-7264
Año de publicación: 2019
Número: 24
Tipo: Artículo
Otras publicaciones en: Macla: revista de la Sociedad Española de Mineralogía
Resumen
The Cameros Basin, situated in the NW of the Iberian mountain range, is one of the basins belonging to the Mesozoic Iberian Rift system in which four megacycles have been distinguished with different stages of rift and postrift, as well as a low-grade metamorphism stage (Mas et al., 2002). In this basin there are some small size mines, barely documented and investigated. One of these is the Serrana Segunda copper mine, located in the Gallinero stream valley, next to the road that connects Gallinero de Cameros with Pradillo. Its last acquisition date back to the beginning of the 20th century (registered in 1909 in the Provincial Historic Archive of La Rioja). In this mining area a gallery and waste heaps are present, with the latter being visible from the road (Fig. 1A and B). The gallery is in a fining upward sequence composed of conglomerates with centimetric clasts in the base and fine to medium grained sandstones, crossed by small, thin carbonate veins, alternated with banded black shales. Occasionally, grey marls appear between the sandstones and shales.