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Browsing Geogaceta -- Nº 16, (1994) by Title
Now showing items 1-20 of 41
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Aminoestratigrafía de los depósitos travertínicos de Priego (Prov. de Cuenca, España central): primeros resultados
(Sociedad Geológica de España, 1994)This paper deals with aminostratigraphy and aminochronology of fluviatile travertine terraces of Priego. U/Th dating allowed to determine the lower system of lateglacial-postglacial and Riss-Wiirm (Eem) Interglaciar ages. ... -
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 ... -
Aspectos composidonales de los piroxenos ígneos del magmatismo básico del sinclinal de Almadén. Implicaciones petrogenéticas
(Sociedad Geológica de España, 1994)Chemical composition of igneous pyroxenes in the basic rocks from the Almadén syncline shows important differences between basaltic lavas and olivine diabases (Silurian to Devonian in age), and quartzdiabases on the other ... -
Aspectos morfosedimentarios de la transgresión pliocena en Almayate (Málaga)
Mayoral Alfaro, Eduardo
; Rodríguez Vidal, Joaquín (Sociedad Geológica de España, 1994)
The studied stratigraphic section represents the progressive sea level rise during the Lower Pliocene age, along the Alboran coast. The work shows Mio-Pliocene continental and Pliocene marine features of both -
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 ... -
Caracterización de la signatura magnética del dique de Plasencia mediante la técnica de iluminación artificial del vuelo aeromagnético de la España peninsular
(Sociedad Geológica de España, 1994)Artificial illumination technique has been applied to a qualitative interpretation of a region of the aeromagnetic survey of Spanish mainland. The investigated region corresponds to a 295 x 190 km rectangle oriented N54.5'-'E ... -
Caracterización de las geodas de cuarzo de Laño (Sur de Vitoria). Relación con la actividad somerizante del diapiro de Peñacerrada (cuenca Vasco-Cantábrica)
(Sociedad Geológica de España, 1994)Quartz geodes of cauliflower type together with some nodular chert have been recorded from Campanian carbonate sediments in the south limb of the Miranda-Treviho Synclinorium. Their m orphology and the e xiste n ce o f ... -
Comportamiento del nitrógeno en los procesos mineralizadores de los yacimientos de Sb de Mari Rosa y El Juncalón (Zona Centro Ibérica)
(Sociedad Geológica de España, 1994)Fluid inclusions associated to Mari Rosa and El Juncalón antimony deposits show that N2 is a relevant component of the fluid phase. Besides, altered host rocks show significant enrichment in nitrogen rather than depletion. ... -
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 ... -
Control tectónico sinsedimentario de la serie estratigráfica del sector de Güeñes (Albiense, Bízkaia)
(Sociedad Geológica de España, 1994)Careful geological mapping and cross section logging o f the Low er-Middle A lbia n succesios in the Guehes area resulted in the discovery of a unknown synsedimentary fault (Saratxaga). The fault had an extensional regime, ... -
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 ... -
Cronología Rb-Sr y K-Ar de diques de la Sierra de Guadarrama (Sistema Central Español)
(Sociedad Geológica de España, 1994)Two calcalkaline granite porphyries, an E-W and a N-S trending one, and three monzonitic dykes striking NE-SW, have been dated. For the first dyke a whole rock Rb-Sr isochrone age of296±3 Ma, i.e. Upper Carboniferous, is ... -
La Cuenca Central de Bransfield (NW de la Peninsula Antàrtica): primeros resultados de la campaña GEBRA'93
(Sociedad Geológica de España, 1994)The GEBRA '93 (Geological Evolution of the Bransfield Basin) survey was carried out in December 1993 in the Bransfield Strait (NW Antarctic Peninsula) and adjacent areas, onboard BIO Hespérides. The geophysical data ... -
Datos preliminares sobre el Bajociense superior en el sector de Coll Baix (Península de Alcudia, Mallorca)
(Sociedad Geológica de España, 1994)On the basis of ammonite biostratigraphy the precise characterization of the Upper Bajocian (Niortense p.p. and Carantiana p.p. Zones) has been recognized in the Peninsula de Alcudia (Coll Baix) for the first time. It is ... -
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, ... -
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 ... -
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 ... -
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 ... -
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, ... -
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 ...
