Autor(es):
Albardeiro, Luís ; Matos, João Xavier ; Mendes, Márcia ; Solá, A. Rita ; Pereira, Zélia ; Morais, Igor ; Salgueiro, Rute ; Pacheco, Nelson ; Araújo, Vítor ; Oliveira, José Tomás
Data: 2020
Identificador Persistente: http://hdl.handle.net/10400.9/4196
Origem: Repositório do LNEG
Assunto(s): Neves-Corvo; Pomarão; Stratigraphy; Geochronology; Iberian Pyrite Belt; Mineral exploration; Estratigrafia; Geocronologia; Prospeção; Faixa Piritosa Ibérica; Neves-Corvo; Neves-Corvo; Pomarão; Pomarão; Stratigraphy; Stratigraphy; Geochronology; Geochronology; Iberian Pyrite Belt; Iberian Pyrite Belt; Mineral exploration; Mineral exploration; Estratigrafia; Estratigrafia; Geocronologia; Geocronologia; Prospeção; Prospeção; Faixa Piritosa Ibérica; Faixa Piritosa Ibérica
Descrição
ABSTRACT: A geological correlation between Neves-Corvo (NC) and Pomarão antiforms is attempted. These regional scale major sequences are easily correlated but, at local scale, facies and age differences stand out. Stratigraphy includes: i) the Phyllite-Quartzite Group with identical paleogeography setting and similar late Famennian ages for uppermost levels (LL to LN miospore biozones in Pomarão and NC respectively). ii) the Volcano-Sedimentary Complex shows some discrepancyconcerning the age distribution of the felsic volcanic rocks (ca. 356-330for Pomarão and ca. 365-346 Ma for all NC area) while sediments rangefrom mid-Famennian to late Visean age (VH to NM Miospore Biozonefor NC). iii); the Baixo Alentejo Flysch Group (late Visean NM MiosporeBiozone onwards in NC), covering the previous sequences and beingslightly older than the uppermost volcanic rocks of Pomarão. Thecorrelation between these two structures is supported by geology andisotopic/biozone ages and favours exploration scenarios in both regions.
