6 documents found, page 1 of 1
Ediacaran and early-palaeozoic bimodal volcanism in the Ossa-Morena Zone, SW Ib...
Cachapuz, P.; Chichorro, M.; Bento dos Santos, T.; Carvalho, D.; Linnemann, U.; Zieger-Hofmann, M; Zieger, J.; Dantas, E.; Santos, R.V.; Moita, P.This study focuses on bimodal meta-volcanic rocks present in the Iberian Massif, in the ´Evora-Aracena Metamorphic Belt of the Ossa-Morena Zone (OMZ), near the boundary with the South Portuguese Zone. New petrological, geochemical (whole-rock and Sr–Nd isotopes) and LA-ICP-MS U–Pb zircon geochronology data are presented to track the magmatic evolution of both felsic and mafic rocks and their respective geodynam...
Ediacaran and early-palaeozoic bimodal volcanism in the Ossa-Morena Zone, SW Ib...
Cachapuz, P.; Chichorro, Martim Afonso; Bento dos Santos, Telmo; Carvalho, D.; Linnemann, Ulf; Zieger-Hofmann, M.; Zieger, J.; Dantas, E.; Santos, R. V.ABSTRACT: This study focuses on bimodal meta-volcanic rocks present in the Iberian Massif, in the Evora-Aracena Metamorphic Belt of the Ossa-Morena Zone (OMZ), near the boundary with the South Portuguese Zone. New petrological, geochemical (whole-rock and Sr-Nd isotopes) and LA-ICP-MS U-Pb zircon geochronology data are presented to track the magmatic evolution of both felsic and mafic rocks and their respective...
Dados geocronológicos para o soco pré-Mesozoico localizado a Oeste da Falha Por...
Santos, Telmo M. Bento Dos; Chichorro, Martim; Carvalho, D.; Cachapuz, P.; Solá, A. Rita; Dantas, E.; Romão, José; Moreira, Noel; Silva, I. Dias daSUMMARY: Geochronological data from the pre-Mesozoic basement of the Lusitanian Basement (West of the Porto-Tomar Fault) was obtained. Results show a predominant Cadomian/Pan-African and Eburnean inheritance/source, placing this sector as a peri-Gondwanan domain. However, two major differences can be seen in the data: samples with a clear absence in Mesoproterozoic ages vs. samples with a clear presence of thes...
Geochronological data for the Pre-Mesozoic basement located west of the Porto-T...
Bento dos Santos, Telmo; Chichorro, Martim; Carvalho, Diogo; Cachapuz, Pedro; Solá, Rita; Dantas, E.; Romão, José; Moreira, Noel; Dias da Silva, ÍcaroGeochronological data from the pre-Mesozoic basement of the Lusitanian Basement (West of the Porto-Tomar Fault) was obtained. Results show a predominant Cadomian/Pan-African and Eburnean inheritance/source, placing this sector as a peri-Gondwanan domain. However, two major differences can be seen in the data: samples with a clear absence in Mesoproterozoic ages vs. samples with a clear presence of these ages an...
Dados geocronológicos para o soco pré-Mesozoico localizado a Oeste da Falha Por...
Santos, Telmo M. Bento Dos; Chichorro, Martim; Carvalho, D.; Cachapuz, P.; Solá, A. Rita; Dantas, E.; Romão, José; Moreira, Noel; Silva, I. Dias daSUMMARY: Geochronological data from the pre-Mesozoic basement of the Lusitanian Basement (West of the Porto-Tomar Fault) was obtained. Results show a predominant Cadomian/Pan-African and Eburnean inheritance/source, placing this sector as a peri-Gondwanan domain. However, two major differences can be seen in the data: samples with a clear absence in Mesoproterozoic ages vs. samples with a clear presence of thes...
First evidence of Cadomian felsic magmatism in the Évora-Aracena Domain, Ossa-M...
Cachapuz, P.; Chichorro, Martim; Santos, Telmo M. Bento Dos; Carvalho, D.; Benoit, M.; Dantas, E.; Solá, A. RitaSUMÁRIO: Dados geoquímicos obtidos em meta-riólitos da região de Viana do Alentejo incluídos na formação Xistos de Moura permitem diferenciar 3 grupos distintos: Grupo I – rico em HREE com assinatura orogénica; Grupo II – também enriquecido em HREE, mas apresentando natureza anorogénica; e Grupo III - anorogénico, mais enriquecido em REE que os anteriores. Tais informações, quando combinadas com dados geocronol...