Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/3027
Título: Upper crustal structure of Madeira Island revealed from ambient noise tomography
Autor: Matos, Catarina
Silveira, Graça
Matias, Luís
Caldeira, Rita
Ribeiro, Maria Luísa
Dias, Nuno
Krüger, Frank
Bento dos Santos, Telmo
Palavras-chave: Estrutura geológica
Tomografia sísmica
Ilha da Madeira (Arquipélago da Madeira, Portugal)
Arquipélago da Madeira (Portugal)
Data: Jun-2015
Editora: Elsevier
Citação: Matos, Catarina... [et al.] - Upper crustal structure of Madeira Island revealed from ambient noise tomography. In: Journal of Volcanology and Geothermal Research, 298 (1 June 2015), p. 136-145
Resumo: We present the first image of the Madeira upper crustal structure, using ambient seismic noise tomography. 16 months of ambient noise, recorded in a dense network of 26 seismometers deployed across Madeira, allowed reconstructing Rayleigh wave Green's functions between receivers. Dispersion analysis was performed in the short period band from 1.0 to 4.0 s. Group velocity measurements were regionalized to obtain 2D tomographic images, with a lateral resolution of 2.0 km in central Madeira. Afterwards, the dispersion curves, extracted from each cell of the 2D group velocity maps, were inverted as a function of depth to obtain a 3D shear wave velocity model of the upper crust, from the surface to a depth of 2.0 km. The obtained 3D velocity model reveals features throughout the island that correlates well with surface geology and island evolution.
URI: http://hdl.handle.net/10400.9/3027
DOI: http://dx.doi.org./10.1016/j.jvolgeores.2015.03.017
ISSN: 0377-0273
Aparece nas colecções:GCG - Artigos em revistas internacionais

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