Presencia de la amalgama Au-Ag-Hg en el Cinturón Pirítico Ibérico, mina de la Zarza, (Huelva).

  1. Ruiz, C.
  2. Samper, Javier
Revista:
Geogaceta

ISSN: 0213-683X

Año de publicación: 1995

Número: 18

Páginas: 184-187

Tipo: Artículo

Otras publicaciones en: Geogaceta

Resumen

n the La Zarza Mine gold is found as native gold and as Au-Ag-Hg amalgam first discovered in the Iberlam Pyritic Belt. The average amalgam composition obtained by Microprobe Data analyses is A u 03(/ \ g 052Hg0 W. This composition Is similar to that obtained In two massive volcanogenetlc deposits in Canada and Sweden, except for the La Zarza's higher Hg content. Cold deposition took place in two distinct periods: in the first, as native gold included in pyrite; in the second, as an Au-Ag-Hg amalgam, during the pyrite recrystallization process. During this process gold was released, together with silver and mercury, towards the pyrite microfractures by solid state diffusion