Person:
Fernández Rodríguez, Carlos

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First Name
Carlos
Last Name
Fernández Rodríguez
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Geológicas
Department
Geodinámica, Estratigrafía y Paleontología
Area
Geodinámica Interna
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UCM identifierORCIDScopus Author IDDialnet ID

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Now showing 1 - 10 of 21
  • Publication
    Active Triclinic Transtension in a Volcanic Arc: A Case of the El Salvador Fault Zone in Central America
    (MDPI, 2022-06-30) Alonso Henar, Jorge; Fernández Rodríguez, Carlos; Álvarez Gómez, José Antonio; Canora Catalán, Carolina; Staller Vázquez, Alejandra; Díaz, Manuel; Hernández, Walter; García, Ángela Valeria; Martínez Díaz, José J.
    The El Salvador Fault Zone (ESFZ) is part of the Central American Volcanic Arc and accommodates the oblique separation movement between the forearc sliver and the Chortis block (Caribbean Plate). In this work, a triclinic transtension model was applied to geological (fault-slip inversion, shape of volcanic calderas), seismic (focal mechanisms) and geodetic (GPS displacements) data to evaluate the characteristics of the last stages of the kinematic evolution of the arc. The El Salvador Fault Zone constitutes a large band of transtensional deformation whose direction varies between N90° E and N110° E. Its dip is about 70° S because it comes from the reactivation of a previous extensional stage. A protocol consisting of three successive steps was followed to compare the predictions of the model with the natural data. The results show a simple shear direction plunging between 20° and 50° W (triclinic flow) and a kinematic vorticity number that is mostly higher than 0.81 (simple-shearing-dominated flow). The direction of shortening of the coaxial component would be located according to the dip of the deformation band. It was concluded that this type of analytical model could be very useful in the kinematic study of active volcanic arcs, even though only information on small deformation increments is available.
  • Publication
    Relation between intrusive and deformational processes in oblique subductive margins. The case of the zoned Flamenco pluton in northern Chile
    (Elsevier Science B.V., Amsterdam., 2021-12) Rodríguez, Natalia; Díaz Alvarado, Juan; Fernández Rodríguez, Carlos; Breitkreuz, Christoph; Fuentes, Paulina; Merida, Gerardo
    Oblique convergent margins, like the subduction of Phoenix beneath the South American plate during Jurassic and Early Cretaceous times, are characterized by strain partitioning and a positive feedback loop between strike-slip deformation and magma ascent along the magmatic arc. Located in the Coastal batholith of northern Chile, the Flamenco pluton is one of the youngest Andean intrusives emplaced in the western active margin of South America. Besides an older SW domain of granodioritic rocks (c.a. 213 Ma), the NW and E domains of the Flamenco pluton were emplaced between 194 and 186 Ma. They present a normally zoned structure constituted by external gabbroic to Qtz-dioritic magmatic facies and tonalites and granodiorites located in inner areas of the intrusive body. These domains are separated by a central strip of stretched coarse-grained Crd-schists that presents ductile asymmetrical folding and S–C structures that point to the NW-directed displacement of the E domain of the pluton. This syn-emplacement shear zone shows kinematic compatibility and continuity to the north and south with folded and mylonitic metasediments out of the contact aureole of the pluton. Together, these segments constitute a large, steeply dipping sigmoidal structure of average N–S direction; the called here Chañaral transcurrent shear zone. Contemporary to the emplacement of the Flamenco pluton, slight variations in the trend of the crustal-scale structure generated strike-slip and transpressive sectors along the Chañaral shear zone, which favored the access of intruding magmas to the final emplacement level. As a paradigmatic example, the curviplanar Flamenco shear zone, an internal, magmatic branch of the main structure that traverses the E domain of the pluton, is defined by the sinistral and reverse shearing under magmatic conditions of the previously mingled mafic and felsic batches. Consequently, the transpressive Flamenco shear zone is interpreted as an ascent conduit where gabbroic and granodioritic liquids interacted during the building of the intrusive body. In addition, these sheared rocks were affected by late textural coarsening processes that evidence the slow and cyclical cooling of the growing magma reservoir. In contrast with the steeply dipping contacts and structures found to the east, the NW domain of the pluton shows sharp and gently dipping contacts between almost horizontal magmatic layers. We suggest that the western block of the Chañaral shear zone was a relatively passive footwall dominated by horizontal flow trajectories and lower replenishment rates according to the inverse emplacement sequence, i.e., late external mafic batches intruded along the margins of the felsic core. The variable structural arrangement of the crustal rocks that hosted the Flamenco pluton was the result of the complex interaction between far-field and local, magmatic forces during the emplacement process, besides the interference with pre-Andean structures. The presence of the Chañaral shear zone favoring the emplacement of the Flamenco pluton demonstrates that the Late Jurassic to latest Early Cretaceous Atacama Fault System had earlier precursors and both the magmatic arc axis and the transcurrent shear zones migrated landward during Jurassic times.
  • Publication
    La reorganización y la oposición del PCE al franquismo, (1939-1946)
    (Universidad Complutense de Madrid, 2017-03-15) Fernández Rodríguez, Carlos; Otero Carvajal, Luis Enrique
    En el proceso y desarrollo histórico del PCE durante el primer franquismo tuvieron lugar diferentes reestructuraciones y luchas clandestinas protagonizadas por miles de militantes que integraron la organización comunista en aquellos años, muchos de ellos fueron encarcelados y algunos ejecutados por las autoridades franquistas. El origen de la resistencia antifranquista tuvo lugar incluso antes de la finalización de la guerra civil española y estuvo marcada por la desunión entre las distintas organizaciones republicanas españolas, la desorganización entre los militantes, ya que en el caso del PCE, los principales dirigentes que habían salido del país se refugiaron dispersos entre la URSS, México y Francia y una falta de medios y organización entre los diversos grupos heterogéneos clandestinos de comunistas que no salieron de España. Todo ello influyó en estrategias impuestas desde el exterior, subordinadas a las variaciones de la política internacional y condicionada, en numerosas ocasiones, por la represión de la dictadura franquista. Para la realización e investigación de esta tesis doctoral se han consultado diversos archivos donde se albergan los fondos documentales fundamentales para el desarrollo de la misma. Destacaría los consejos de guerra expedidos por el sistema judicial franquista depositados en los diferentes archivos históricos militares, expedientes e informes de la Brigada Político Social y de la Guardia Civil y toda la documentación generada por el propio PCE y albergada en su archivo histórico. El final de la guerra civil española se inició con un período de sistemática y desmedida represión por parte de las autoridades franquistas contra miles de republicanos que fueron víctimas de encarcelamientos, torturas, fusilamientos y exilio. Para legitimar sus acciones, el régimen franquista se apoyó en un sistema judicial basado en un código de justicia militar y articulado en unas leyes promulgadas que parecían justificar sus actos. La división en el campo republicano español entre socialistas, anarquistas y republicanos por un lado y los comunistas por otro, marcado por un claro sentimiento anticomunista, llevó a un golpe de Estado protagonizado por el coronel republicano Segismundo Casado y la creación de una Junta Nacional de Defensa. Se produjo un enfrentamiento armado entre las propias fuerzas republicanas causando unos dos mil muertos, encarcelamiento de gran cantidad de comunistas y la imposibilidad de realizar una oposición unitaria contra la dictadura...
  • Publication
    Strength of the lithosphere of Mercury
    (Wiley, 2010) Egea González, Isabel; Ruiz Pérez, Javier; Fernández Rodríguez, Carlos; Márquez González, Álvaro; Lara López, Luisa M.
  • Publication
    La evolución térmica de la litosfera de Marte
    (2011) Ruiz Pérez, Javier; López, Valle; Jiménez Díaz, Alberto; Tejero López, Rosa; Fernández Rodríguez, Carlos
  • Publication
    Medida de la deformación de pliegues en el extremo oriental del Sistema Central español
    (Sociedad Geológica de España, 1987) González Casado, José Manuel; Fernández Rodríguez, Carlos
    We propase an areal distribution for the second phase hercynian folds in the eastermost part of the Spanish Central System, based on their morphological charactheristics. The analysis of these data allows us to ca/cu/ate the shortening anc/. the flattening responsable for the Hercynian second phase.
  • Publication
    Adaptación de la docencia práctica en Geología Estructural al uso de herramientas digitales
    (Universidad Complutense de Madrid, 2022-06-27) Álvarez Gómez, José Antonio; Alonso Henar, Jorge; Fernández Rodríguez, Carlos; Herrero Barbero, Paula; Insúa Arévalo, Juan Miguel; Jiménez Molina, David; Martínez Díaz, José J.; Perea Manera, Hector; Pro Diáz, Yolanda de; Romeo Briones, Ignacio; Ruiz Pérez, Javier; Sánchez Roldán, Jose Luis; Herrero Gil, Andrea
  • Publication
    Lithospheric contraction concentric to Tharsis: 3D structural modeling of large thrust faults between Thaumasia highlands and Aonia Terra, Mars
    (Elsevier, 2023-12) Herrero Gil, Andrea; Egea González, Isabel; Jiménez Díaz, Alberto; Rivas Dorado, Samuel; Martínez Parro, Laura; Fernández Rodríguez, Carlos; Ruiz Pérez, Javier; Romeo Briones, Ignacio
    Large thrust faults on Mars are caused by lithospheric planetary contraction. The geometry of these faults is linked with the mechanical behavior of the lithosphere. Tharsis, the largest volcano-tectonic province on Mars, controls the global tectonic pattern of the planet. Here, we present a study of five large thrust faults concentric to Tharsis, located between the Thaumasia Highlands and the Argyre impact basin. We applied a 3D structural modeling, using a combination of fault-parallel flow and trishear algorithms to estimate the geometry and kinematics of the faults at depth. The modeled faults show an upper planar part dipping 33° to 40°, rooting with a listric geometry into horizontal levels at 13–27 km depth, with fault slips of 801–3366 m. The general out-of-Tharsis vergence, the listric fault geometries and the deepening of the depth of faulting toward Thaumasia outline an incipient thrust wedge architecture. Assuming that the largest faults rooted at the Brittle-Ductile Transition, we calculate a heat flow at the time of faulting of 24–54 mW m−2. The obtained strength envelopes for dry and wet conditions show that all the strength of the lithosphere was located in the upper half of the crust.
  • Publication
    On the Rootless Nature of a Devonian Suture in SW Iberia (Ossa-Morena Complex, Variscan Orogen): Geometry and Kinematics of the Azuaga Fault
    (American Geophysical Union, 2021-06) Díez Fernández, Rubén; Fernández Rodríguez, Carlos; Arenas Martín, Ricardo; Novo Fernández, Irene
    Suture zones are key to understand collisional orogens, but not all the remains of subduction leading to collision occur in the root of the suture. The Azuaga Fault bounds a Devonian suture zone known as Central Unit. This fault is a steeply NE-dipping, Variscan strike-slip fault with left-lateral and reverse oblique slip components formed during sinistral transpression in the Pennsylvanian. Motion along this fault was coeval with folding and fabric development in both its hanging wall and footwall, and also with the Matachel Fault. Tectonic flow associated with the Azuaga Fault shows high-vorticity, explaining the exhumation of a flat-lying Devonian suture zone via WNW-plunging extrusion from the upper-middle crust under inclined triclinic transpression during ENE-WSW convergence. The exposed basal contact of the Central Unit is not the root zone of a Variscan suture zone, but instead is a NE-dipping breaching fault that cuts across the suture zone that is contiguous to the SW under the upper section of the footwall. The peri-Gondwanan terrane between the Central Unit and the South-Portuguese Zone of the Iberian Massif (most of the Ossa-Morena Zone) is underlain by a Devonian suture, implying it is a continental allochthon. Variscan suture zones in Europe are affected by strike-slip faults. In our case, this pattern implies the location of suture zone exposures and location of its root are different. Suture zones and strike-slip faults are common in orogens and analysis of their relationships may lead to relocation of suture zone roots and re-thinking of upper and lower plates.
  • Publication
    Modelos cinemáticos de la deformación varisca en la zona de cizalla de Hiendelaencina (Anticlinorio del Ollo de Sapo, Zona Centroibérica)
    (Sociedad Geológica de España., 2016) Fernández Rodríguez, Carlos; Capote del Villar, Ramón; Díaz Azpiroz, Manuel
    Los modelos utilizados hasta el momento para la caracterización cinemática de la zona de cizalla dúctil de Hiendelaencina, cuya actividad principal se desarrolló durante la segunda fase varisca que afectó al Anticlinorio del Ollo de Sapo (Zona Centrobérica, Macizo Ibérico), se basan en aproximaciones que no tienen en cuenta el carácter simultáneo de la actuación de las distintas componentes del flujo (cizalla simple, cizalla pura, cambio de volumen). En este trabajo se evalúa el ajuste de los datos de deformación interna y fábricas planolineares resultantes de la actuación de la dicha zona de cizalla a modelos que consideran flujos triclínicos. Como consecuencia, se han identificado dos sectores dentro de la estructura (A y B, estando el primero originariamente situado al noroeste del segundo) con características cinemáticas contrastadas. En ambos casos la componente de cizalla simple implicó desplazamiento del bloque de techo hacia el sureste (zona de cizalla sub-horizontal o suavemente buzante al NO). El sector A fue afectado simultáneamente por un acortamiento sub-vertical y un estiramiento de dirección E-O, mientras que el sector B registró un estiramiento sub-vertical y un acortamiento E-O. Estas diferencias responderían a un reparto heterogéneo de las componentes del flujo dentro de una estructura de tipo “restraining bend”.