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

• Type: Article in International Conference Proceedings Book
• Date: 2007

Authors

Couto, H (Author) FCUP; Borges, FS (Author) Other; Roger, G (Author) Other

Conference proceedings International

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

Pages: 609-612

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

Dublin, IRELAND, AUG 20-23, 2007

Indexing

ISI Web of Knowledge - 1 Citation

Scientific classification

FOS: Natural sciences > Earth and related Environmental sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4