El Skarn de Castro de Rey (Lugo)

  1. I. Martínez-Abad 1
  2. M.A. Cepedal 1
  3. D. Arias 1
  4. A. Martín-Izard 1
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Journal:
Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2012

Issue Title: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Issue: 13

Pages: 1352-1355

Type: Article

More publications in: Geotemas (Madrid)

Abstract

In this paper the morphology, distribution and mineralogy of the Castro de Rey skarn is described. This deposit is located 25 km ESE from the town of Villalba (Lugo), within the West Asturian Leonese Zone of the Iberian Massiff. The Castro de Rey skarn is a calcic exoskarn hosted by marbles and calc-silicate hornfels. This mineralization is stratigraphically and structurally controlled and it consists of several stratiform ore bodies. The prograde skarn in the marbles is characterised by the formation of garnet (Adr₁₈₋₅₉), pyroxene (Hd₂₇₋₉₉), quartz and wollastonite, with scheelite, fluorapatite, K-feldspar and calcite as accessory minerals. The prograde skarn and calc-silicate hornfels are locally overprinted by two stages of retrograde alteration. The first stage consists of amphibole, epidote, zoisite, quartz, calcite, K-feldspar and sulfides, mainly pyrrhotite and chalcopyrite. The second stage is characterized by prehnite or chlorite, quartz, calcite and sulfides and the gold mineralization is accompanied by Bi, Te, S asemblages, molibdenite, chalcopyrite and pyrite. Based on the general characteristics of the Castro de Rey skarn, this deposit is classified as a reduced tungsten skarn.