Los indicios auríferos sobre la Fm Vegadeo en el corredor Navelgas-Trevías (Zona Asturoccidental-Leonesa)

  1. González Nistal, Santiago 1
  2. Ordóñez Alonso, Almudena 1
  3. García Ordiales, Efrén 1
  4. Alberquilla Martínez, Fernando 1
  5. Alvarez García, Rodrigo 1
  1. 1 Grupo de investigación ISYMA, Escuela de ingeniería de minas, energía y materiales, Universidad de Oviedo
Revista:
Estudios geológicos

ISSN: 0367-0449

Any de publicació: 2023

Volum: 79

Número: 2

Tipus: Article

DOI: 10.3989/EGEOL.45078.1069 DIALNET GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Estudios geológicos

Resum

In this paper, some results of practical interest regarding the gold mineralisation occurring in the northern area of the Navelgas gold belt (West Asturian-Leonese Zone) are presented. The mineral paragenesis of the Navelgas hydrothermal-type mineralization has been completed with the presence of arsenopyrite, lollingite, native Bi, bismuthinite, gersdorfite, violarite, monazite and parisite. Native gold, although scarce, is mainly associated with pyrite and asenopyrite. Pyrite, predominant sulphide, contains 625 mg-kg-1 of invisible refractory gold. Micro-analysis of trace elements in alluvial gold particles indicates the presence of several unknown primary gold showings, likely associated with quartz veins, in the upper basin of the Navelgas river. In the San Feliz area, about 12 km NE of Navelgas, refractory gold (727 mg-kg-1) has been identified in the goethite (pseudomorph of pyrite) within the eluvium overlying the Vegadeo Fm, suggesting the possible existence of deep mineralized areas.

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Fuente de los datos: Dialnet