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
8 results
Search Results
Now showing 1 - 8 of 8
Item Seismic structure of the southern Rivera plate and Jalisco block subduction zone(Seismological Research Letters, 2019) Núñez Escribano, Diana; Núñez Cornú, Fancisco Javier; Escalona Alcázar, Felipe de Jesús; Córdoba Barba, Diego; López Ortiz, Jesualdo Yair; Carrillo de la Cruz, Juan Luis; Dañobeitia, Juan JoséStructural and tectonic features in the Pacific Coast of Mexico generate a high level of seismic activity in the Jalisco block (JB) region, making it one of the most attractive areas of the world for geophysical investigations. The Rivera–North America contact zone has been the object of different tectonic studies in recent years framed within the TsuJal project. To this day, this project is generating numerous crucial geophysical results, which significantly improve our understanding of the region. Our study is focused on the interaction between the south of the JB and Rivera plate (RP), which crosses the Middle America trench. We also cover anoffshore–onshore transect of 130 km length between the eastern Rivera fracture zone and La Huerta region, in the Jalisco state. To characterize this region,we interpretedwide-angle seismic, multichannel seismic, and multibeam bathymetry data. The integration of these results, with the local and regional seismicity recorded by the Jalisco Seismic Accelerometric Telemetric Network and by the Mapping the Rivera Subduction Zone experiment, provides new insights into the geometry of the southern RP, which is dipping12°–14° under the JB in the northeast–southwest direction. Moreover, our results provide new seismic images of the accretionary wedge, the shallow crust, the deep crust, and the upper-mantle structure along this profile.Item Tectonic analysis of the southern of María Cleofas Island from bathymetric and seismic data(Seismological Research Letters, 2019) Carrillo-de la Cruz, Juan Luis; Núñez Escribano, Diana; Escalona-Alcázar, Felipe de Jesús; Núñez-Cornú, Francisco Javier; González-Fernández, Antonio; Córdoba Barba, Diego; Dañobeitia, Juan JoséThe TsuJal geophysical survey was conducted during the spring of 2014 with the aim to characterize the crustal structure of western Mexico. This geophysical experiment focused on active geological formations such as subduction, faults, and accretionary prisms, which are related to the seismic and tsunamigenic activity. In this work, we used seismic and bathymetric data to characterize the interaction between the Rivera plate (RP) and the North America plate south of María Cleofas Island. By defining the structural trends and subsurface geology, we sought to understand the complexity of the tectonic framework of western Mexico. A migrated seismic section and bathymetric maps were generated via the acquisition and processing of TsuJal geophysical data. Bathymetric data show major seafloor structures related to two basins (Tres Marías and TsuJal), one canyon (Cocodrilo Canyon), and an uplift structure with a north–south trend (Sierra de Cleofas [SC]). Seismic data reveal a compressional regime related to the movement of the RP at the esternmost end of the seismic section and lack of deformation in sediments within the two basins found adjacent to SC. From the results of our data analysis as well as corroborating literature, we interpret an underthrusting of RP beneath the North America plate, causing a compressional tectonic regime with the formation of palm‐tree structures. The ack of deformation may be associated with a heated oceanic plate that facilitates the relative motion of the basement below the sediments.Item Morphotectonic study of the Greater Antilles(Geotectonics, 2017) Cotilla Rodríguez, Mario; Córdoba Barba, Diego; Núñez Escribano, DianaThe first morphotectonic model of the Greater Antilles is presented. The model is adjusted to the current dynamics between the Caribbean and North American plates. It is mainly elaborated by Rantsman’s methodology. We determined 2 megablocks, 7 macroblocks, 42 mesoblocks, 653 microblocks and 1264 nanoblocks. They constitute a set of active blocks under rotation, uplifting and tilting movements. A total of 11 active knots of faults and 8 cells are the main articulation areas. The largest seismogenetic structures in the Northern Caribbean are an array of the active fault segments. The majority of them are in the Caribbean-North American Plate Boundary Zone, the Hispaniola has the most complex neotectonic structure–associated with the central axis of the morphotectonic deformations in the region.Item The extended continental crust West of Islas Marías (Mexico)(Frontiers in Earth Science, 2021) Núñez Escribano, Diana; Acosta Hernández, Jorge A.; Escalona Alcáraz, Felipe de Jesús; Pilia, Simone; Núñez Cornú, Francisco Javier; Córdoba Barba, DiegoThe crustal structure around the Islas Marías Archipelago has been debated for a long time. An important unresolved question is where the Rivera-North American plate subduction ends and the Tamayo fracture zone begins, from SE to NW. Results from the TsuJal project have shed light on the northwesternmost part of the Jalisco block structure. It is now clear that Sierra de Cleofas and the Islas Marías Escarpment comprise the northwestern continuation of the Middle America trench. However, other questions remain. In this paper, we present the structure of the shallow and deep crust and the upper mantle of the Islas Marías western region through the integration of multichannel seismic reflection, wide-angle seismic bathymetric and seismicity data, including records of an amphibious seismic network, OBS, and portable seismic stations, purposely deployed for this project, providing an onshore-offshore transect of 310 km length. Our findings disclose new evidence of the complex structure of the Rivera plate that dips 8°–9° underneath the NW Jalisco block as revealed by two seismic profiles parallel to the Islas Marías Escarpment. Moreover, we find five sedimentary basins and active normal faults at the edges of tectonic structures of the E-W oriented West Ranges and the N-S trending Sierra de Cleofas. Furthermore, the Sierra de Cleofas is the beginning of the active subduction of the Rivera plate beneath North America. The oceanic crust thickens and submerges towards the south while is coupled with the continental crust, from 6 km at the northern ends of the seismic profiles to 15 km in the contact region and 24 km at the coast and southern ends of them. The continental Moho was not fully characterized because of the geometry of the seismic transects, but a low-velocity layer associated with Rivera Plate subduction was observed beneath the Jalisco Block. Our results constrain the complexity of the area and reveal new structural features from the oceanic to continental crust and will be pivotal to assess geohazards in this area.Item The TsuJal Amphibious Seismic Network: A Passive-Source Seismic Experiment in Western Mexico(Frontiers in Earth Science, 2021) Javier Núñez-Cornú, Francisco; Córdoba Barba, Diego; Bandy, William; José Dañobeitia, Juan; Alarcón Salazar, José Edgar; Núñez Escribano, Diana; Suárez Plascencia, CarlosThe geodynamic complexity in the western Mexican margin is controlled by the multiple interactions between the Rivera, Pacific, Cocos, and North American plates, as evidenced by a high seismicity rate, most of whose hypocenters are poorly located. To mitigate this uncertainty with the aim of improving these hypocentral locations, we undertook the TsuJal Project, a passive seafloor seismic project conducted from April to November 2016. In addition to the Jalisco Seismic Network, 10 LCHEAPO 2000 Ocean Bottom Seismometers (OBSs) were deployed by the BO El Puma in a seafloor array from the Islas Marias Archipelago (Nayarit) to the offshore contact between the states of Colima and Michoacan. We located 445 earthquakes in four or more OBSs within the deployed array. Most of these earthquakes occurred in the contact region of the Rivera, Pacific, and Cocos plates, and a first analysis suggests the existence of three seismogenic zones (West, Center, and East) along the Rivera Transform fault that can be correlated with its morphological expression throughout the three seismogenic zones. The seismicity estimates that the Moho discontinuity is located at 10 km depth and supports earlier works regarding the West zone earthquake distribution. Subcrustal seismicity in the Central zone suggests that the Intra-Transform Spreading Basin domain is an ultra-low spreading ridge. A seismic swarm occurred during May and June 2016 between the eastern tip of the Paleo-Rivera Transform fault and the northern tip of the East Pacific Rise-Pacific Cocos Segment, illuminating some unidentified tectonic feature.Item Seismic structure of the crust in the western Dominican Republic(Tectonophysics, 2019) Núñez Escribano, Diana; Córdoba Barba, Diego; Kissling, EduardThe contact between the Caribbean and North American plates is a tectonically complicated boundary where the deformation is accommodated in north and south of Hispaniola by the Enriquillo-Plantain Garden and Septentrional–Oriente Fault Zones (EPGFZ and SOFZ). We present a crustal and tectonic study of the Northeastern Caribbean Plate Boundary from wide-angle seismic data (WAS) acquired during the GEOPRICO-DO (2005) and CARIBE NORTE (2009) surveys, showing two transects crossing, from north to south, North American Plate (NOAM), Bahamas Platform, central Hispaniola and Caribbean Plate (CP). The results presented include two 2-D P wave velocity models of 425 km and 200 km long oriented NNE-SSW and ENE-SSW, respectively, obtained by the travel time forward and inverse modeling of the WAS data. Our study defines that the contact between Bahamas Platform, North American Plate and Hispaniola corresponds to oblique subduction with the Moho dipping 11° in the NNE-SSW direction. Furthermore, in the south, our results reveal the existence of an anomalous deep-reaching zone of lateral velocity variation in the mantle that could be associated with EPGFZ and a possible detached oceanic slab from NOAM that could explain the deep seismicity in the region.Item Seismotectonic characterization of Mexico(Revista geográfica de América Central, 2019) Cotilla Rodríguez, Mario; Córdoba Barba, Diego; Núnez Cornú, Francisco JavierMéxico es una Región Sismotectónica activa, mayoritariamente en la placa continental de Norteamérica y tiene los 2 tipos de sismicidad (entreplacas y de interior de placa). La estructura jerárquica contiene 3 Provincias Sismotectónicas (Norte-Occidental, Occidental y Centro-Oriental), en ellas hay 11 Unidades Sismotectónicas y en éstas se localizan las zonas sismogenéticas. Estas últimas están segmentadas. La Provincia Occidental es la de más nivel y donde se encuentra el contacto de las placas convergentes.Item Morfotectónica de Jalisco y Oaxaca (1), México(Revista geográfica de América Central, 2017) Cotilla Rodríguez, Mario; Córdoba Barba, Diego; Núnez Cornú, Francisco Javier; Gómez Hernández, Adán; Pinzón López, Juan Ignacio; Rivera-Rodríguez, Leonardo DanielLa transmisión de esfuerzos, desde la zona de interacción convergente de placas en el Pacífico hacia el interior continental, ha determinado la actual configuración del plano morfotectónico del entorno mexicano. Ese proceso ha producido dos importantes zonas de deformación transversales, Puerto Vallarta y Oaxaca. Aplicando la metodología de Rantsman (1979) se ha determinado en el territorio emergido un mismo patrón morfoestructural y morfotectónico con ciertas modificaciones en Puerto Vallarta. Para la zona centro-oeste mexicana se distinguen 6 bloques, 29 microbloques, 6 alineamientos principales y 4 intersecciones principales de alineamientos. Estos elementos se ajustan a las zonas de mayor actividad y deformación neotectónica (~38000 km2), con un eje principal NO-SE. La misma técnica se aplicó a la región de Oaxaca, adyacente a Tehuantepec, donde hay 8 bloques, 25 microbloques, 8 alineamientos principales y 14 intersecciones principales de alineamientos. Este conjunto tiene una zona de deformación (~40000 km2) con eje principal E-O. El análisis de la sismicidad, las fracturas, los alineamientos, los cuerpos volcánicos y las velocidades de convergencia de las placas con los modelos obtenidos, permite considerar un movimiento de rotación anti-horario, vinculado a la microplaca Rivera para Puerto Vallarta; mientras que en Oaxaca existe un ajuste frontal en la convergencia directa de la placa Cocos, donde no hay rotación.