Person: Córdoba Barba, Diego
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First Name
Diego
Last Name
Córdoba Barba
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Física de la Tierra y Astrofísica
Area
Física de la Tierra
Identifiers
4 results
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Item Survey explores active tectonics in Northeastern Caribbean(Eos, Transactions American Geophysical Union, 2005) Carbó Gorosabel, Andrés; Córdoba Barba, Diego; Martín Dávila, José; Ten Brink, Uri S.; Herranz Araújo, Pedro; Von Hilldebrant, Christa; Payero, Juan; Muñoz Martín, Alfonso; Pazos, Antonio; Catalán, Manuel; Granja Bruña, José Luis; Gómez Ballesteros, MaríaThere is renewed interest in studying the active and complex northeastern Caribbean plate boundary to better understand subduction zone processes and for earthquake and tsunami hazard assessments [e.g., ten Brink and Lin, 2004; ten Brink et al., 2004; Grindlay et al, 2005]. To study the active tectonics of this plate boundary, the GEOPRICO-DO (Geological, Puerto Rico-Dominican) marine geophysical cruise, carried out between 28 March and 17 April 2005 (Figure 1), studied the active tectonics of this plate boundary. Initial findings from the cruise have revealed a large underwater landslide, and active faults on the seafloor (Figures 2a and 2c). These findings indicate that the islands within this region face a high risk from tsunami hazards, and that local governments should be alerted in order to develop and coordinate possible mitigation strategies. The cruise collected multibeam bathymetry, gravity, magnetic, high-resolution seismic, deep seismic sounding, and multichannel seismic reflection data, which are currently being processed and interpreted (Table 1). In early November 2005, 10 ocean-bottom seismometers (OBS) that had been deployed northeast of Puerto Rico and the Virgin Islands (Figure 1) during the cruise were recovered. These OBS recorded data during the cruise and the local seismicity between April and October 2005.Item Crustal thickness and images of the lithospheric discontinuities in the Gibraltar arc and surrounding areas(Geophysical Journal International, 2015) Mancilla Pérez, Flor de Lis; Stich, Daniel; Morales, José; Martín, Rosa; Díaz, Jordi; Pazos, Antonio; Córdoba Barba, Diego; Pulgar, Javier A.; Ibarra, Pedro; Harnafi, Mimoun; González Lodeiro, FranciscoThe Gibraltar arc and surrounding areas are a complex tectonic region and its tectonic evolution.since Miocene is still under debate. Knowledge of its lithospheric structure will help to.understand the mechanisms that produced extension and westward motion of the Alboran domain,.simultaneously withNW–SE compression driven by Africa–Europe plates convergence..We perform a P-wave receiver function analysis in which we analyse new data recorded at.83 permanent and temporary seismic broad-band stations located in the South of the Iberian.peninsula. These data are stacked and combined with data from a previous study in northern.Morocco to build maps of thickness and average vP/vS ratio for the crust, and cross-sections.to image the lithospheric discontinuities beneath the Gibraltar arc, the Betic and Rif Ranges.and their Iberian and Moroccan forelands. Crustal thickness values show strong lateral variations.in the southern Iberia peninsula, ranging from ∼19 to ∼46 km. The Variscan foreland is.characterized by a relatively flat Moho at ∼31 km depth, and an average vP/vS ratio of ∼1.72,.similar to other Variscan terranes, which may indicate that part of the lower crustal orogenic.root was lost. The thickest crust is found at the contact between the Alboran domain and the.External Zones of the Betic Range, while crustal thinning is observed southeastern Iberia.(down to 19 km) and in the Guadalquivir basin where the thinning at the Iberian paleomargin.could be still preserved. In the cross-sections, we see a strong change between the eastern.Betics, where the Iberian crust underthrusts and couples to the Alboran crust, and the western.Betics, where the underthrusting Iberian crust becomes partially delaminated and enters into.the mantle. The structures largely mirror those on the Moroccan side where a similar detachment.was observed in northern Morocco. We attribute a relatively shallow strong negativepolarity.discontinuity to the lithosphere-asthenosphere boundary. This means relatively thin.lithosphere ranging from ∼50 km thickness in southeastern Iberia and northeastern Morocco.to ∼90–100 km beneath the western Betics and the Rif, with abrupt changes of ∼30 km under.the central Betics and northern Morocco. Our observations support a geodynamic scenario.where in western Betics oceanic subduction has developed into ongoing continental subduction/delamination while in eastern Betics this process is inactive.Item Modeling the crust and upper mantle in northern Beata Ridge (CARIBE NORTE Project)(Pure and Applied Geophysics, 2015) Núñez Escribano, Diana; Córdoba Barba, Diego; Cotilla Rodríguez, Mario Octavio; Pazos, AntonioThe complex tectonic region of NE Caribbean, where Hispaniola and Puerto Rico are located, is bordered by subduction zone with oblique convergence in the north and by incipient subduction zone associated to Muertos Trough in the south. Central Caribbean basin is characterized by the presence of a prominent topographic structure known as Beata Ridge, whose oceanic crustal thickness is unusual. The northern part of Beata Ridge is colliding with the central part of Hispaniola along a transverse NE alignment, which constitutes a morphostructural limit, thus producing the interruption of the Cibao Valley and the divergence of the rivers and basins in opposite directions. The direction of this alignment coincides with the discontinuity that could explain the extreme difference between west and east seismicity of the island. Different studies have provided information about Beata Ridge, mainly about the shallow structure from MCS data. In this work, CARIBE NORTE (2009) wide-angle seismic data are analyzed along a WNW-ESE trending line in the northern flank of Beata Ridge, providing a complete tectonic view about shallow, middle and deep structures. The results show clear tectonic differences between west and east separated by Beata Island. In the Haiti Basin area, sedimentary cover is strongly influenced by the bathymetry and its thickness decreases toward to the island. In this area, the Upper Mantle reaches 20 km deep increasing up to 24 km below the island where the sedimentary cover disappears. To the east, the three seamounts of Beata Ridge provoke the appearance of a structure completely different where sedimentary cover reaches thicknesses of 4 km between seamounts and Moho rises up to 13 km deep. This study has allowed to determine the Moho topography and to characterize seismically the first upper mantle layers along the northern Beata Ridge, which had not been possible with previous MCS data.Item IBERARRAY: La componente sísmica del proyecto TopoIberia(Geotemas, 2008) Morales Soto, José; Pazos, Antonio; García Lobón, J.L.; Córdoba Barba, Diego; Álvarez Pulgar, Francisco Javier; Carbonell Beltrán, Ramón; Villaseñor Rodríguez, Isabel; Díaz Cusí, Jordi; Gaite Castrillo, Beatriz; Gallart Muset, JosepIberarray, componente sísmica del proyecto TopoIberia, está formada por una red densa de estaciones sísmicas de banda ancha y alta resolución a semejanza del USarray del proyecto Earthscope. Los objetivos que se persiguen con la instalación de Iberarray es estudiar la relación que existe entre los procesos que tienen lugar a escala litosférica y en la corteza de la península Ibérica, mar de Alborán y norte de Marruecos. Esta red está dedicada fundamentalmente a generar una base de datos de formas de onda con una resolución sin precedentes en una zona de especial interés geodinámico como es la región del contacto de placas continentales de Eurasia y Africa. Esta red está ya instalada en su primera fase, hasta 38.5º de Latitud, conformando una malla de 50x50 km entre estaciones. Iberarray está constituida por 50 estaciones de banda ancha más las aportaciones de las redes permanentes en la zona (IAG-UGR,ROA) y las redes portátiles del IAG-UGR y del ICT-CSIC. Iberarray es el brazo sísmico del proyecto multidisciplinar TopoIberia.