Relaciones entre rocas volcánicas y plutónicas en el distrito minero de Riotinto, Faja Pirítica Ibérica, España
- T. Donaire 1
- M. Toscano 1
- E. Pascual 1
-
1
Universidad de Huelva
info
ISSN: 1576-5172
Année de publication: 2016
Titre de la publication: IX CONGRESO GEOLÓGICO DE ESPAÑA
Número: 16
Pages: 431-434
Type: Article
D'autres publications dans: Geotemas (Madrid)
Résumé
The Iberian Pyrite Belt, South Portuguese Zone of the Iberian Massif, is a region known worldwide for its huge massive sulphide deposits. Regional magmatism, related in time and space to the ore deposits, is bimodal and consists of basic and felsic rocks, both volcanic and subvolcanic. In points of the South Portuguese Zone, plutonic rocks also occur. These have been generally considered to postdate volcanism and related to a later magmatic event. U-Pb dating of plutonic and volcanic rocks in Riotinto and the neighboring Campofrío area indicates however that at least some of the plutonic rocks were coeval with volcanic tocks. In addition, a number of petrographic, geochemical and isotopic similarities suggest that plutonic and volcanic rocks could be genetically related. These relationships could account for some of the features of the massive sulphide deposits in the region.