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Título: | Imaging granitic plutons along the IBERSEIS profile |
Autor: | Flecha, I.; Carbonell, Ramón CSIC ORCID ; Zeyen, H.; Martí, David CSIC ORCID ; Palomeras, Imma; Simancas, F.; Pérez-Estaún, Andrés CSIC | Palabras clave: | Seismic tomography Seismic velocities Granite seismic properties |
Fecha de publicación: | 2006 | Editor: | Elsevier BV | Citación: | Tectonophysics 420: 37- 47 (2006) | Resumen: | The parameters used for the acquisition of the IBERSEIS deep seismic reflection profile in the SW Iberian Peninsula provide seismic images of the deep crust as well as a high resolution section of the shallow subsurface. A very dense array of sources and receivers allowed high resolution tomographic studies in zones of special interest (granitic plutons). The three dimensional tomographic inversion produced velocity models along a 500 m wide and 1000 m deep strip along the IBERSEIS transect in the areas of La Bazana, La Dehesilla, Feria and Villafranca. In these high resolution velocity models (sampled by 50 × 50 × 50 m cells), high velocity anomalies indicate the geology and extension of the granitic plutons at depth. This directly correlates with the surface outcrops. Moreover, tomographic models provided valuable information for the geometry and characterization of fractured and fresh domains in a rock volume. Furthermore, a piggy back seismic acquisition experiment using additional seismic instrumentation from the University of Paris Sud (40-channel DMT) provided perpendicular, offline recordings of the Vibroseis sources. This additional recording system was deployed perpendicularly to the main IBERSEIS seismic reflection line and provided additional 3D control. | Versión del editor: | http://dx.doi.org/10.1016/j.tecto.2006.01.019 | URI: | http://hdl.handle.net/10261/345862 | Identificadores: | doi: 10.1016/j.tecto.2006.01.019 issn: 0040-1951 |
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