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Browsing Geogaceta -- Nº 16, (1994) by Issue Date
Now showing items 1-20 of 41
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Evidencias metamórficas y estructurales de extensión tardiorogénica hercinica: el ejemplo del Domo Gneisico del Tormes (NO Salamanca)
(Sociedad Geológica de España, 1994)The tectonothermal Variscan evolution of the Tormes Gneiss Dome is controlled by a subhorizontal ductile shear zone of crustal scale and extensional characteristics, that induced a quick exhumation of the deep parts of the ... -
Estructuras contractivas de la Cordillera Prelitoral Catalana entre la sierra de Les Pedritxes y el río Ripofll: evolución y relación con los depósitos del márgen de la cuenca del Ebro
(Sociedad Geológica de España, 1994)During paleogene times the deformation area associated to the Vallés fault system developed a series of compressive structures. In itially there was theem placement of a succession of thrusts and folds affecting mainly the ... -
Serie Basáltica Antigua Inferior en el sector de Hermigua. Isla de la Gomera
(Sociedad Geológica de España, 1994)Lower Old Basaltic Series had only been described W of the Basal Complex in Alojera -Tazo area but it is also well exposed in other zones on Comera as in Hermigua area E of the Basal Complex. Here, the basaltic lava flows ... -
Contenido en cloruros de las precipitaciones al sur de Sierra Nevada (Granada). Aplicación a la evaluación de recursos hídricos
(Sociedad Geológica de España, 1994)The chloride contents o f p recip itation in some stations located to the south o f Sierra Nevada (Granada, Spain) have been monitored. The average values obtained in each station range between 2 and 17 mg/I, controlled m ... -
Evidencias de actividad diapírica sobre las unidades deposicionales del Maastrichtiense en la zona de Laño (Sur de Vitoria, cuenca Vasco-Cantábrica)
(Sociedad Geológica de España, 1994)The Laño quarry, situated near Vitoria in the south limb of the Miranda-Treviñ o Synclin orium , show san interesting section of Maastrichtian rocks which were re deposited in a variety of environments, such as marine, ... -
Estudio de las rocas madre del Albiense medio-superior de la región de Bir M'Cherga, Túnez: interacción de la diagénesis orgànica-inorgànica con la migración primaria de hidrocarburos
(Sociedad Geológica de España, 1994)Geochemical, mineralógicaI and petrophysic examination of the source rocks of the Middle-Upper Albien maristones and chalks from the Bir M'Cherga region (Tunisia) provide insights into factors which control the organic and ... -
Estimación de las condiciones del metamorfismo hercínico de alta presión de la Sierra de Guadarrama
(Sociedad Geológica de España, 1994)A revision of the P-T conditions of the first metamorphic episode, based on new data on the mineral chemistry of the residual high pressure paragenesis of the metabasic and metapelitic rocks from the Sierra de Guadarrama, ... -
Corte compensado y restituido del Apenino septentrional
(Sociedad Geológica de España, 1994)Step-by-step restored cross-sections across the northern Apennines allow the reconstruction of the kinem atics of the orogenic belt as well as amounts of shortening and extension. The convergence between the Apulian plate ... -
Nuevos datos sobre la petrología y procedencia de la Formación Miers Bluff, Isla Livingston, Islas Shetland del Sur
(Sociedad Geológica de España, 1994)The turbidites of the Miers Bluff Formation have been pelrologically analised and some compositional parameters have been calculated. The use of several ternary diagrams allow for some provenance speculations such as a ... -
Introducción al estudio de indicios manganesíferos, situados en las inmediaciones de Requena, País Valenciano
(Sociedad Geológica de España, 1994)Inside the sector of «Muntanya de Valencia» (Iberian Range), there are a number of Mn mineralizations. Some of these deposits have been explored for mining. In every case there are paleokarst mineralizations which have ... -
La evolución temporal de los minerales de la arcilla en el Pérmico superior y Triásico de Cuenca y Teruel (Cordillera Ibérica SE)
(Sociedad Geológica de España, 1994)Clay mineralogy of the continetal and shallow marine sediments of Permian and Triassic age of the SE Iberian Ranges is a neglected subject. The present study shows the temporal variations of clay mineral assemblages and ... -
Modelo hidroquímico de sedimentación de glauberita-halita: sondeo PURASAL, Formación Yesos de Zaragoza (Mioceno Inferior, Cuenca del Ebro)
(Sociedad Geológica de España, 1994)The geochemical study of halite samples belonging to PURASAL borehole (Zaragoza Gypsum Fm., non-marine Lower Miocene, Ebro Basin, Spain) shows low contents for Br, Mg and l<. The study of fluid inclusions (Cryo-SEM -EDS ... -
Nuevos datos estratigráficos de la Unidad Central, Hauz Intermedio (Dorsal Rifeña). Consecuencias paleogeográficas
(Sociedad Geológica de España, 1994)The presence both of radiolarites, attributed to the Dogger-Malm, and grey marls from the early Late Eocene in the Intermediate U n it o f the Haouz M ountains (Rifian Dorsal) indicates that the sea occupied the area at ... -
Nuevos datos sobre la litoestratigrafia del Eoceno-Oligoceno inferior de la zona suroriental de la Cuenca del Ebro (Sector de Pontils-Montblanc, provincias de Tarragona y Barcelona)
(Sociedad Geológica de España, 1994)This paper deals with new data on the lithostratigraphy of the Upper Paleocene-Lower Oligocene successions in the Pontils-Montblanc area (western part of the southeastern margin of the Eastern Ebro Basin, NE Spain). The ... -
Análisis de hidrocarburos por cromatografía de gases en muestras albienses de la región Vasco-Cantábrica
(Sociedad Geológica de España, 1994)Selected asphalt and black-shale type samples from the Basque-Cantabrian region were analyzed from a stratigraphlcal/sedlmentological and geochemical (gas chromatography) points of view. Preliminary results on the origin ... -
Hallazgo de Parotosuchus sp. (Amphibia, Temnospondyli) en las facies Buntsandstein del Pia de la Calma (Cordilleras Costeras Catalanas): resultados preliminares
(Sociedad Geológica de España, 1994)The tetrapod fauna of La Mora site (Montseny massif) is located in the Buntsandstein facies at the lower part of the « Areniscas y lutitas del Figaró» unit. This fauna is found within a sandy, fluvial channel-fill and is ... -
Un sistema de paleoalto carbonatado-surco siliciclástico (Gorbea-Artzentales, Albiense medio, Bizkaia)
(Sociedad Geológica de España, 1994)During the middle Albian, fault block synsedimentary activity induced the formation of a paleohigh (Corbea) and an adjacent sedimentary trough, While (he high was exposed in the subaerial meteoric environment realm, the ... -
La falla de Ubierna (margen SO de la cuenca Cantábrica)
(Sociedad Geológica de España, 1994)The Ubierna fault is a major structure in the southern margin of the Cantabrian Basin. It controlled the subsidence during the intra-Mesozoic extensional event allow ing the deposit of progressively to the north thicker ... -
Estructura alpina de los alrededores de Guadalix de la Sierra (S.E. del Sistema Central español) basada en interpretaciones gravimétricas
(Sociedad Geológica de España, 1994)A detailed gravimetric study has been carried out in a sector in SE border of the Spanish Central Range (in the area of Guadalix de la Sierra) in which fractures have been detected that affect both the Hercian basement and ... -
Bauxitas kârsticas de la Sierra de Boada (Sierras Marginales surpirenaicas, Alös de Balaguer, Lleida)
(Sociedad Geológica de España, 1994)One of the most important bauxite site in the Spanish Pyrenees is the Sierra de Boada which is analyzed in this note. The bauxites are located between Middle Jurassic dolostones and Upper Cretaceous sandstones. They are ...
