Utilize este identificador para referenciar este registo: http://hdl.handle.net/10362/4701
Título: Assinatura tectono-sedimentar do auge da compressão bética em Portugal: a descontinuidade sedimentar Valesiano terminal-Turoliano
Autor: Cunha, Pedro Proença
Pimentel, N.
Pereira, D. I.
Palavras-chave: Cenozoic
Basin analysis
Alluvial deposits
Palaeogeography
Brittle tectonics
Betic compression
Portugal
Data: 28-Dez-2010
Resumo: An Upper Miocene important sedimentary break can be accurately recognised in the Portuguese basins and is reflected by a drastic palaeogeographic change in relation to a large-scale tectonic event of probable uppermost Vallesian-Turolian (9,5 Ma; middle Tortonian) age. The characterisation of the sedimentary record of this tectonic event, as well as its relations with interpreted active faults is made for different situations: Douro (NW border), Mondego, Lower-Tagus and Sado Tertiary basins. The sedimentary record, considered upper Tortonian-Messinian ? (uppermost Vallesian-Turolian ?) is interpreted mainly as endorheic alluvial fans (internal drainage), developed along active NNE-SSW indent-linked strike-slip faults and NE-SW reverse faults. At NE Portugal, proximal fluvial systems of an endorheic hydrographic network drained eastwards to the Spanish Duero interior Basin. The main evidences of the betic compression clímax in Portugal mainland are presented; the interpreted active tectonic structures are in accordance with an intense NNW-SSE crustal shortening, but some regional differences are also documented.
URI: http://hdl.handle.net/10362/4701
Aparece nas colecções:FCT: DCT - Ciências da Terra

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