Thesis Collection
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Browsing Geogaceta -- Nº 20-4, (1996) by Title
Now showing items 1-20 of 66
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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 ... -
Análisis poblacional de fallas alpinas en el borde occidental de la Cuenca Vasco-Cantábrica (Cordillera Cantábrica, NO de España)
(Sociedad Geológica de España, 1996)Geological cross-section through the western border of the Basque-Cantabrian Basin shows the existence o f extensional faults active during Permo-Mesozoic sedimentation, as well as their tectonic inversion during Alpine ... -
Anomalous soil gas C02 concentrations and relation to seismic activity at Rabaul caldera, Papua New Guinea
(Sociedad Geológica de España, 1996)Medidas de C02 en los suelos de la caldera de Rabaul, Papua Nueva Guinea, reflejan niveles de concentración altos, hasta cerca de un 20%, en relación con un margen activo de la caldera definido por sismicidad. Estos niveles ... -
Aplicación de técnicas de Geo-radar a los muros biológicos de hormigón armado en el interior de una central nuclear
(Sociedad Geológica de España, 1996)Accurate identification of frames into concrete reinforced walls in a nuclear power plant was required because of maintenance labours. Several cuts in the concrete, including the frame, were planned. The cutting lines were ... -
Aplicaciones de Geo-radar para la determinación del volumen de hormigón necesario para la reparación del revestimiento de bóveda y hastiales de un túnel
(Sociedad Geológica de España, 1996)The vault damage in a railway tunnel, caused by damps in a granite massif, produced the granite slabs roof detachment. Sustitution of these granite slabs by concrete, including damping voids between the roof and the granite ... -
Backarc evolution from rifting to mature spreading: The Bransfileld and North Fiji Basins (NW Antarctica and SW Pacific)
(Sociedad Geológica de España, 1996)Five areas, the Eastern and Central Bransfield Basins off the Antarctic Peninsula, and the Tripartite, Central Spreading and South Pandora Ridges of the North Fiji Basin, have been studied using swath-bathymetry and ... -
Campos de paleoesfuerzos terciarios en el borde oriental de la cuenca del Tajo (España central)
(Sociedad Geológica de España, 1996)Three compressive pa/eostress fields, which have been active during the Tertiary, have been deduced from fault-slip data in the eastern border of the Tajo Basin. The first one («Iberian» paleostress field) had a N55E maximum ... -
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 ... -
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 ... -
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 ... -
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 ... -
Deformación contractiva del margen noroeste ibérico: Implicaciones tectónicas del estudio paleomagnético de la Cuenca de As Pontes (NW España)
(Sociedad Geológica de España, 1996)The magnetochronology of the syntectonic sedimentary infilling of the Tertiary Basin of As Pontes (Northwest Spain) has allowed to determine that the activity of the N W -SE dextral strike -slip faults systems o f Galicia ... -
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 ... -
Deformaciones transtensivas en la Dorsal Sur de Scotia (NE Península Antàrtica)
(Sociedad Geológica de España, 1996)The South Scotia Ridge is studied by swath bathymetry, multichannel seismic and magnetometry profiles, obtained during the HESANT 92/93 cruise. The ridge is composed by thinned continental crust fragments and to the north ... -
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 ... -
Determinación de la deformación finita en la vertiente sur del Pirineo oriental a lo largo de la transversal del rio Ter
(Sociedad Geológica de España, 1996)Strain determinations in the Paleogene rocks of the Ter-Freser section give values 1,1 <Y/Z<1,95 assuming plane strain conditions. Subhorizontal materials of the southern part of the Ebro basin exhibit a remarkable degree ... -
Disposición geométrica profunda de los materiales terciarios en el corte del río Najerilla.(Sector Riojano de la Cuenca del Ebro)
(Sociedad Geológica de España, 1996)A geological section has been constructed along the Najerilla River crossing the extreme north of the Sierra de La Demanda and the southern margin of the Ebro Basin. This section was augmented with subsurface information ... -
Drenaje fluvial y topografía ligados a extensión: NÈ dé Iberia
(Sociedad Geológica de España, 1996)Integrated analysis of fluvial drainage pattern, digital topography and regional tectonics allows to determine the lateral extent of high topography linked to the extensional system of faults that parallels the coastline ... -
El campo de esfuerzos compresivo neógeno en el NE de la Península Ibérica
(Sociedad Geológica de España, 1996)The Neogene stress field in the northeastern Iberian Peninsula is reconstructed from the analysis of brittle mesostructures (stylolytes, tension gashes, fault populations and joints). Compression directions obtained show ... -
El límite Cuenca Powell/Mar de Weddell. Estructura y relación con la fragmentación Cenozoica de la Península Antàrtica
(Sociedad Geológica de España, 1996)Late Paleogene to Neogene continental fragmentation of the Northern Antarctic Peninsula caused the development of small oceanic-floored basins such as Powell Basin. On the basis of MCS profiles and swath bathymetry collected ...
