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Upper crustal structure of Madeira Island revealed from ambient noise tomography
- 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 20 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. (C) 2015 Elsevier B.V. All rights reserved.
Author details: | Catarina Matos, Graca Silveira, Luis Matias, Rita Caldeira, M. Luisa Ribeiro, Nuno A. Dias, Frank KrügerGND, Telmo Bento dos Santos |
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DOI: | https://doi.org/10.1016/j.jvolgeores.2015.03.017 |
ISSN: | 0377-0273 |
ISSN: | 1872-6097 |
Title of parent work (English): | Journal of volcanology and geothermal research |
Publisher: | Elsevier |
Place of publishing: | Amsterdam |
Publication type: | Article |
Language: | English |
Year of first publication: | 2015 |
Publication year: | 2015 |
Release date: | 2017/03/27 |
Tag: | Ambient noise tomography; Crustal structure; Madeira island; Volcanic rift zone |
Volume: | 298 |
Number of pages: | 10 |
First page: | 136 |
Last Page: | 145 |
Funding institution: | LNEG scholarship |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
Peer review: | Referiert |
Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |