Late Palaeozoic orogenic gold-antimony deposits from the Durico-Beira area (North Portugal) and their relation with hidden granitic apexes

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2007

Autores

Couto, H (Autor) FCUP; Borges, FS (Autor) Outra; Roger, G (Autor) Outra

Ata de Conferência Internacional

Título: DIGGING DEEPER, VOLS 1 AND 2: DIGGING DEEPER

Páginas: 609-612

9th Biennial Meeting of the Society for Geology Applied to Mineral Deposits

Dublin, IRELAND, AUG 20-23, 2007

Indexação

ISI Web of Knowledge - 1 Citação

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da terra e ciências do ambiente

Outras Informações

ID Authenticus: P-004-CXQ

Abstract (EN): The Durico-Beirao gold-antimony mining district (North Portugal) hosts gold-antimony-tin-tungsten mineralizations. Most of the ore deposits were emplaced in the epimetamorphic Precambrian and/or Cambrian to Devonian sequences of the Valongo Anticline, and in the basal layers of Carboniferous basins immediately west of this structure. A direct spatial relationship between the mineralization and the outcropping granites could not be established. However, some data indicate that a genetic relationship with the non-outcropping granites may exist. The occurrence of minor Sn or W minerals in the first Fe-As stage of deposition in some Sb-Au deposits, the presence of acid, igneous rocks affected by intense albitization and by cataclase. In addition the Cathodoluminescence (CL) properties, the chemical signatures of apatite from the hydrothermal veins and from granites, and the comparison with similar Hercynian metallogenic districts suggest an indirect genetic relationship between the Sb-Au veins and hidden granites.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4