Un yacimiento de Au en carbonatos del Orógeno Hercínico: el área de Salamón (N León).
- A. Paniagua 1
- L. S. Rodríguez Pevida 2
- J. Loredo 3
- L. Fontboté 4
- P. Fenoll Hach-Alí 5
- 1 Departamento de Geología. Universidad de Oviedo. E-33005 Oviedo.
- 2 Río Narcea Gold Mines, S. A. E- Salas (Asturias).
- 3 Dpto. de Explotación y Prospección de Minas. Universidad de Oviedo. E-33004 Oviedo.
- 4 Dept. de Mineralogie. Université de Geneve. CH-1211 Geneve 4 (Switzerland).
- 5 IACT-Depto. de Mineralogía-Petrología. Universidad de Granada. E-18002 Granada.
ISSN: 0213-683X
Año de publicación: 1996
Número: 20
Páginas: 1605-1608
Tipo: Artículo
Otras publicaciones en: Geogaceta
Resumen
The Salamon gold prospect constitutes an example of carbonate-hosted gold deposit formed during the last events of the Hercynian orogeny. lt is formed by a complex paragenetic sequence of Au-As-Sb-Hg-Cu-Ni-Co-Pb-Zn-U minerals in jasperoid and quartz-dolomite host rock. Au correlated positively with As at single crystal scale in pyrite and arsenopyrite, of fluid inclusion study and arsenopyrite geothermometry show temperatures in the range 140-280ºC at 350-400 bars. Stable isotope data suggest reduction of sulfur from marine evaporites and buffer of carbon in the fluid by the host carbonates. The age of the deposit is 269 ± 5 m. y., U-Pb determination on uranite grains gires and which is consistent with on uranite age from Villamarin and with age determinations of intrusive rocks spatially associated to several ore deposits in the area.