Dados geocronológicos para o soco pré-Mesozoico localizado a Oeste da Falha Porto-Tomar: implicações geodinâmicas

• Main Author: Santos, Telmo M. Bento Dos
• Publication Date: 2023
• Other Authors: Chichorro, Martim, Carvalho, D., Cachapuz, P., Solá, A. Rita, Dantas, E., Romão, José, Moreira, Noel, Silva, I. Dias da, Clavijo, E., Díez-Montes, Alejandro, Valverde-Vaquero, Pablo, Santos, R. V., Linnemann, Ulf
• Language: por
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: http://hdl.handle.net/10400.9/4101
• topic: U-Pb geochronology; Zircon; Detrital provenance; Cadomian Orogeny; Geocronologia U-Pb; Zircão; Proveniência detrítica; Orogenia Cadomiana

SUMMARY: 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 these ages and Silurian-Devonian ages. If the former show clear signs of affinity with the Ossa-Morena Zone, the latter are similar to the South Portuguese Zone, being one of the samples, probably deposited in the Middle-Upper Devonian, interpreted as having a mixed source.