Upper crustal structure of Madeira Island revealed from ambient noise tomography

被引：20

作者：

Matos, Catarina ^{[1
]}

Silveira, Graca ^{[1
,2
]}

Matias, Luis ^{[1
]}

Caldeira, Rita ^{[1
,3
]}

Ribeiro, M. Luisa ^{[3
]}

Dias, Nuno A. ^{[1
,2
]}

Krueger, Frank ^{[4
]}

Bento dos Santos, Telmo ^{[1
,3
]}

机构：

[1] Inst Dom Luiz, P-1749016 Lisbon, Portugal

[2] ISEL, P-1959007 Lisbon, Portugal

[3] LNEG, P-2610999 Amadora, Portugal

[4] Univ Potsdam, Inst Erd & Umweltwissensch, D-14476 Potsdam, Germany

来源：

JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH | 2015年 / 298卷

关键词：

Madeira island; Volcanic rift zone; Crustal structure; Ambient noise tomography; RAYLEIGH-WAVE TOMOGRAPHY; EASTERN NORTH-ATLANTIC; MANTLE; COMPOSITE; EVOLUTION; BENEATH; PLUMES;

D O I：

10.1016/j.jvolgeores.2015.03.017

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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.

引用

页码：136 / 145

页数：10

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