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Browsing Geogaceta -- Nº 40, (2006) by Issue Date
Now showing items 1-20 of 79
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Sedimentología y caracterización paleoambiental de la serie cretácica inferior de Antromero-Luanco (Asturias)
(Sociedad Geológica de España, 2006)A paleoenvironmental study for a Lower Cretaceuos (Late Barremian-Aptian) succession (Antromero-Luanco section, Asturian coast) is showed in this work based on stratigraphic, sedimentological and paleontological data. ... -
Registro del evento anóxico oceánico OAE1a (Aptiense inferior) en un contexto de plataforma. Prebético (provincia de Alicante)
(Sociedad Geológica de España, 2006)The Early Aptian was a time of major global events, being probably the most notable the Oceanic Anoxic Event 1a. In this paper, we present the study of the record of the OAE1a in a platform setting, the Prebetic Zone of ... -
Historia del levantamiento tectónico de la Sierra de Cameros (Cordillera Ibérica, España): restricciones en base a cronología mediante huellas de fisión y (U-Th)/He en apatitos
(2006)In this work, we present new fission track and (U-Th)/He data of in apatites in order to reconstruct the exhumation of Sierra de Cameros, in the northwestern part of Iberian Range (Spain). Apatite fission track (AFT) ... -
Caracterización geológica de los afloramientos de El Pimpollar, extremo nororiental de la Zona Surportuguesa
(2006)Two volcanic units can be distinguished in the “El Pimpollar” outcrop (eastern South-Portuguese Zone). The Lower Unit is composed mainly of submarine dacites and andesites, with some subordinated basalts and trachyandesites. ... -
Aplicaciones geotermobarométricas de los contenidos en elementos trazas de minerales granulíticos: Zr en rutilo y HREE en granate de los xenolitos félsicos de la corteza inferior del Sistema Central Español
(2006)Geothermobarometric estimations based on the trace element concentration of minerals from lower crustal peraluminous felsic granulite xenoliths from the Spanish Central System (SCS) have been performed. Zr in rutile ... -
Clasificación geomecánica de macizos pizarrosos en el sinclinal de Truchas
(2006)Rock mass characterization and classification are significant in geological investigations involving engineering works and in the field of applied geology. Discontinuities characterization and rock properties determination are ... -
Estudio geométrico comparativo de pliegues asociados a la propagación y terminación lateral de cabalgamientos
This work examines the geometry of two examples of fault-propagation folds related to the lateral termination of thrusts. In spite of their differences in age (Variscan and Alpine) and composition of the involved ... -
Origen de las simas de Partagat (Sierra de Aitana, Alicante)
(2006)The Partagat chasms, located at the highest part of the Sierra de Aitana (Province of Alicante), are large joints which have opened up in Eocene limestone. They measure up to 15-20 metres in width and dozens of metres ... -
Primeros resultados de huellas de fisión en apatito en el sector Lugo-Ancares (Noroeste de la Península Ibérica)
(2006)The Northwest of the Iberian Peninsula is characterised by the absence of Mesozoic sedimentary deposits, the Cenozoic sediments being scarce. Due to that, the chronology of the geological events in the area is difficult ... -
Estructura y paleogeografía de los materiales del Triásico en la terminación meridional del Arco de Cazorla (Jaén, Cordillera Bética): Implicaciones tectónicas
(2006)This study proposes a tectonic reinterpretation of the southwest end of the Cazorla Arc from two different points of view never used before in external zones of the Betic Cordillera: the paleogeographic study of the ... -
Geología y estructura de la Mina de Río Tinto (Faja Pirítica Ibérica, España)
(2006)The Rio Tinto mining district is regarded as the largest volcanogenic massive sulphide district worldwide, but its geologic and structural setting remains poorly disclosed. The mineralized sequence includes a lower unit ... -
La transversal de Gavarnie-Guara. Estructura y edad de los mantos de Gavarnie, Guara-Gèdre y Guarga (Pirineo centro-occidental)
(2006)The structure of the eastern extreme of the Jaca Basin is defined by the Gavarnie, Guara-Gèdre and Guarga thrust sheets. The Guara-Gèdre thrust was active during mid Luttetian-earliest Chattian and the Gavarnie thrust, ... -
Microestructuras, luminiscencia y geoquímica en Crassostrea sp. de la Formación Zufía, Navarra (Albiense superior-Cenomaniense inferior). Parte I
(2006)Shells of the oyster Crassostrea sp. from the Zufia Formation, deposited in a strongly subsiding basin at the end of the Albian, show the same microstructures than recent and fossil Crassostrea sp., deposited in other less ... -
Mapa de esfuerzos de Europa a partir de Mecanismos Focales calculados desde el Tensor de Momento Sísmico
(2006)This work shows a new stress map for Europe obtained from the inversion of earthquakes focal mechanisms calculated with the centroid tensor method (Dzieownski et al., 1982). An amount of 1608 focal mechanisms have been ... -
Morfología de circones vs. filiación geoquímica de rocas metavolcánicas en el Antiforme del Narcea (N de España)
(2006)In the Narcea Antiform, both Ediacaran upper volcanic series and volcanic clasts in the overlying Cambrian micro-conglomerates, show geochemistry between those of calc-alkaline and alkaline series in the TAS diagram, and ... -
Modelo gravimétrico tridimensional del “stock” de Aguablanca (Badajoz)
(2006)The Aguablanca stock is located in the NE zone of the Santa Olalla Igneous Complex, in the Ossa-Morena Zone. Paleozoic rocks of the Bodonal-Cala Complex and Santa Olalla tonalites bound this gabbronorite stock. This rock ... -
Modelos de abanicos aluviales en los materiales cantabrienses (Grupo Cea) del Manto del Esla, Cordillera Cantábrica
(2006)The main aim of this paper is to describe two alluvial fan models that have been generated in the Esla Nappe of the Cantabrian Zone during the lower Stephanian. These models have been named Duerna alluvial fan and Peña ... -
Variación estacional de los contenidos en carbono orgánico, inorgánico y azufre en los sedimentos del estuario de los ríos Tinto y Odiel (SO España)
López González, Nieves
; Borrego Flores, José; Morales González, Juan Antonio; Carro Flores, Berta (Sociedad Geológica de España, 2006)
The study of 12 sediment traps located in the Tinto and Odiel river estuary show the influence of the acid contributions in the seasonal variation of the contents in organic carbon, inorganic carbon and sulfur. The seasonal ... -
Variación estacional de las características texturales en los sedimentos intermareales del estuario de los ríos Tinto y Odiel (SO España)
López González, Nieves; Morales González, Juan Antonio; Borrego Flores, José; Carro Flores, Berta (Sociedad Geológica de España, 2006)
The seasonal evolution in the sediment textural characteristics along the Tinto and Odiel river estuaries has been studied by means of 12 sediment traps. The fine-grained material is associated with flocculation and ... -
El Edificio Antiguo de la isla de San Vicente (Cabo Verde): características del sector occidental
(2006)A more than 1000m thick pile of basaltic lava flows and pyroclasts dipping seawards rises on the western sector of San Vicente. Several systems of dikes cut across the succession that is composed of two different sequences. ...
