Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/4981
Título: Intrusion of Lamprophyre dyke and related deformation effects in the host rock salt: A case study from the Loulé Diapir, Portugal
Autor: Machek, M.
Roxerova, Z.
Zavada, P.
Silva, Pedro Manuel Fernandes Carvalho da
Henry, B.
Dedecek, P.
Petrovsky, E.
Marques, Fernando O.
Palavras-chave: MAS
Lamprophyre Dyke
Rock Salt
Data: Ago-2014
Editora: Elsevier Science BV
Citação: MACHEK, M.; [et al] – Intrusion of Lamprophyre dyke and related deformation effects in the host rock salt: A case study from the Loulé Diapir, Portugal. Tectonophysics. ISSN: 0040-1951. Vol. 629 (2014), pp. 165-178
Resumo: A rock salt-lamprophyre dyke contact zone (sub-vertical, NE-SW strike) was investigated for its petrographic, mechanic and physical properties by means of anisotropy of magnetic susceptibility CAMS) and rock magnetic properties, coupled with quantitative microstructural analysis and thermal mathematical modelling. The quantitative microstructural analysis of halite texture and solid inclusions revealed good spatial correlation with AMS and halite fabrics. The fabrics of both lamprophyre and rock salt record the magmatic intrusion, "plastic" flow and regional deformation (characterized by a NW-SE trending steep foliation). AMS and microstructural analysis revealed two deformation fabrics in the rock salt: (1) the deformation fabrics in rock salt on the NW side of the dyke are associated with high temperature and high fluid activity attributed to the dyke emplacement; (2) On the opposite side of the dyke, the emplacement-related fabric is reworked by localized tectonic deformation. The paleomagnetic results suggest significant rotation of the whole dyke, probably during the diapir ascent and/or the regional Tertiary to Quaternary deformation. (C) 2014 Elsevier B.V. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.21/4981
DOI: 10.1016/j.tecto.2014.04.030
ISSN: 0040-1951
Aparece nas colecções:ISEL - Física - Artigos

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