Thesis Collection
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Browsing Geogaceta -- Nº 20-4, (1996) by Issue Date
Now showing items 1-20 of 66
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Preliminary results on 3He/4He isotopic ratios in terrestrial fluids from Iberian peninsula: seismoctectonic and neotectonic implications
(Sociedad Geológica de España, 1996)La sistemática de isotópos de helio está siendo aplicada en la península Ibérica con el fin de obtener información adiccional sobre las características neotectónicas y sismotectónicas del área de estudio. Resultados ... -
Velocidades de transmisión de ondas P y S en rocas máficas y ultramáficas. Datos obtenidos experimental mente y calculados. Macizo de Sierra Alpujata. (Cordilleras Béticas)
(Sociedad Geológica de España, 1996)The seismic properties of upper mantle representative samples from the Ronda ultramafic body (Betic Cordillera, Spain) have been determined using laboratory direct measurements and calculations based on the lattice preferred ... -
Estado de esfuerzos actuales en el centro peninsular a partir del análisis conjunto de mecanismos focales de terremotos
(Sociedad Geológica de España, 1996)This study establishes current stress field in Central Iberia using earthquake focal mechanisms analysis. Inversion procedure is based on fault populational analysis. Two diferent orthogonal stress fields have been deduced. ... -
Modelización numérica de la evolución geodinámica del surco de Valencia
(Sociedad Geológica de España, 1996)A numerical kinematic model of extension has been used to study the geodynamic evolution of the Valencia Trough. The model allows for depth-dependent lithospheric extension and lateral accommodation of extension. The best ... -
Determinación de campos regionales de esfuerzo en el Prebético de Albacete
(Sociedad Geológica de España, 1996)A microstructural analysis has been carried out in the northernmost part of the External Zone in the Betic Cordilleras (Albacete province). Paleostress orientations have been calculated from 1.326 striated fault planes ... -
Estudio comparativo de varios modelos de pliegues asociados a fallas. Problemas detectados
(Sociedad Geológica de España, 1996)A study over twenty-two northeast trending fault propagation folds has been performed. A portion of the fold and thrust belt, affecting the Cretaceous sediments located in the northern side of the Spanish Central System, ... -
Actividad neotectónica de la Falla de Alentejo-Plasencia en Extremadura (Macizo Hespérico)
(Sociedad Geológica de España, 1996)Signs of recent tectonic activity are found at the Extremadura sector of Alentejo-Plasencia fault. This fault was active during the alpine compressional period as a sinistraI strike-slip fault at the foreland of a collisional ... -
Esfuerzos actuales en la región del Arco de Scotia
(Sociedad Geológica de España, 1996)The study of the stresses in the Scotia Arc, determined by right dihedra diagrams of earthquake focal mechanisms, illustrates the present-day tectonics of the region. The Scotia Arc is a large sinistral fault zone, with ... -
Características estructurales asociadas al núcleo metamórfico de Lora del Río (Zona de Ossa-Morena)
(Sociedad Geológica de España, 1996)The Lora del Rio metamorphic core is located in the easternmost part of the Monesterio Antiform. A detailled structural and metamorphic study combined with cartographic data enable the characterization of 3 different ... -
Red GPS para medidas geodinámicas en el Pirineo (ResPyr)
(Sociedad Geológica de España, 1996)A second geodynamical network has been set up in the Central and Eastern Pyrenees to quantify tectonic horizontal movements. The network is localized on the two sides of the Pyrenees and is composed by 20 points in the ... -
Tectónica de cabalgamientos en la Faja Pirítica Ibérica (Zona Sur Portuguesa): el Antiforme de la Puebla de Guzmán, y la lámina de cabalgamiento de Sanlúcar de Guadiana
(Sociedad Geológica de España, 1996)The Sanlucar de Guadiana thrust sheet and the Puebla de Guzmán Antiform in the central Iberian Pyrite Belt are interpreted as alloctonous units displaced to the south, forming part of an imbricated thrust system dipping ... -
Deformación neotectónica relacionada con anticlinales de núcleo salino (NE de la cuenca del Ebro, Barcelona)
(Sociedad Geológica de España, 1996)Interest on areas of low seismicity but with neotectonic deformation has increased related to the existence of catastrophic earthquakes in areas far away of the active plate margins. In the Ebro basin neotectonic deformation ... -
Neotectónica en el antepaís castellano de las cordilleras Béticas orientales
(Sociedad Geológica de España, 1996)The major morphotectonic features in the foreland of the Eastern Betics can be explained within the frame of the weak compressive stress field originated in the Prebetic fold and thrust belt. This NW directed compression ... -
Caracteristicas de los esfuerzos activos interplaca en la Península Ibérica
(Sociedad Geológica de España, 1996)Current active tectonic stress fields are deduced in intraplate areas of Iberian Peninsula with moderate to low seismic activity. Five areas are analyzed by means of individual focal mechanism data, populational analysis ... -
El prisma orogénico prebético
(Sociedad Geológica de España, 1996)The frontal part of the Prebetic zone corresponds to an orogenic prism (accretionary wedge) which obeys the critical taper model. Three sections parallel to the transport direction show conspicuous similarities with the ... -
Estructura extensional e inversion tectónica en los Andes argentinos entre los 30° 30' y 31° 00' S
(Sociedad Geológica de España, 1996)In the Andean Frontal Cordillera two tectonostratigraphlc main groups can be defined: a gondwanic basament constituted by devonian and Permo-Carboniferous marine sedimentary rocks, intruded by Upper Paleozoic granitic ... -
Cuantificación del desplazamiento dextroso Alpino en la cordillera Ibérica a partir de datos gravimétricos
(Sociedad Geológica de España, 1996)Intraplate deformation in the eastern zone of the Iberian Peninsula is characterized by strike-slip faulting during Tertiary. Gradient pattern of Bouguer Anomaly Map of the Spanish Central SystemIberian Range linking zone ... -
Sismicidad en el antepaís de las cordilleras Béticas orientales: determinación del tensor de esfuerzos actual
(Sociedad Geológica de España, 1996)The seismicity in the Castilian foreland of the Betic Cordilleras is in accordance with an intraplate compressive stress-field that is characterized by the coexistence of two stress tensors: SHmax N140°-160°E (regional ... -
Estructura de la Cuenca de Jaca en el sector occidental de las Sierras Exteriores Aragonesas
(Sociedad Geológica de España, 1996)In the western part of the Sierras Exteriores Aragonesas the southern Pyrenean front is not a southvergent large thrust, but an isoclinal detachment fold (Santo Domingo anticline), whose core is occuppied by the Upper ... -
Crisis tectónicas cuaternarias en la cuenca de Madrid
(Sociedad Geológica de España, 1996)Quaternary sediment deformation structures of Madrid Basin have been analyzed. We get a high symmetry degree in deduced stress tensor trends, concluding that there are a regional stress field with NW-SE Shmax trend. Local ...
