Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/131719
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invite to open peer review
Title

Crustal structure of an intraplate thrust belt: The Iberian Chain revealed by wide-angle seismic, magnetotelluric soundings and gravity data

AuthorsSeillé, H.; Salas, R.; Pous, J.; Guimerà, J.; Gallart Muset, Josep CSIC ORCID; Torné, Montserrat CSIC ORCID ; Romero-Ruiz, I.; Diaz, J. CSIC ORCID ; Ruiz Fernández, Mario CSIC ORCID ; Carbonell, Ramón CSIC ORCID ; Mas, José Ramón CSIC ORCID
KeywordsIberian Chains
2D forward gravity modeling
2D seismic velocity–depth model
Seismic refraction/wide-angle reflection profile
Magnetotellurics
3D MT inversion
Issue Date2015
PublisherElsevier
CitationTectonophysics 663: 339- 353 (2015)
AbstractThe Iberian Chain is a Cenozoic intraplate thrust belt located within the Iberian plate. Unlike other belts in the Iberia Peninsula, the scarcity of geophysical studies in this area results in a number of unknowns about its crustal structure. The Iberian Chain crust was investigated by means of a NE-SW refraction/wide-angle reflection seismic transect and two magnetotelluric profiles across the chain, oriented along the same direction. The seismic profile was designed to sample the crust by means of three shots designed to obtain a reversed profile. The resulting velocity-depth model shows a moderate thickening of the crust toward the central part of the profile, where crustal thickness reaches values above 40. km, thinning toward de SW Tajo and NE Ebro foreland basins. The crustal thickening is concentrated in the upper crust. The seismic results are in overall agreement with regional trends of Bouguer gravity anomaly and the main features of the seismic model were reproduced by gravity modeling. The magnetotelluric data consist of 39 sites grouped into two profiles, with periods ranging from 0.01 s to 1000 s. Dimensionality analyses show significant 3D effects in the resistivity structure and therefore we carried out a joint 3D inversion of the full impedance tensor and magnetic transfer functions. The Mesozoic and Cenozoic basins along the Chain are well characterized by shallow high conductive zones and low velocities. Elongated conductors reaching mid-crustal depths evidence the presence of major faults dominating the crustal structure. The results from the interpretation of these complementary geophysical data sets provided the first images of the crustal structure of the Iberian Chain. They are consistent with a Cenozoic shortening responsible of the upper crust thickening as well as of the uplift of the Iberian Chain and the generation of its present day topography.
Publisher version (URL)http://dx.doi.org/10.1016/j.tecto.2015.08.027
URIhttp://hdl.handle.net/10261/131719
DOI10.1016/j.tecto.2015.08.027
Identifiersdoi: 10.1016/j.tecto.2015.08.027
issn: 0040-1951
Appears in Collections:(Geo3Bcn) Artículos




Files in This Item:
File Description SizeFormat
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record

CORE Recommender

SCOPUSTM   
Citations

17
checked on May 16, 2024

WEB OF SCIENCETM
Citations

16
checked on Feb 21, 2024

Page view(s)

346
checked on May 20, 2024

Download(s)

113
checked on May 20, 2024

Google ScholarTM

Check

Altmetric

Altmetric


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.