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Browsing Geogaceta -- Nº 20-7, (1996) by Issue Date
Now showing items 21-40 of 69
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Rasgos estructurales principales de la cuenca cretácica inferior del Maestrazgo (Cordillera Ibérica oriental)
(Sociedad Geológica de España, 1996)The Maestrat basin (up to 6.5 km of Mesozoic sediments) is an intracontinental basin located in the Iberian Range (Iberian Basin), which underwent two significant rift stages during the Late Jurassic and Early Cretaceous. ... -
Visión global del Proyecto Berrocal. Planteamiento y objetivos
(Sociedad Geológica de España, 1996)The El Berrocal Project was preceded by a preliminary study (0 Phase) started in 1989, intended to prepare and ensuring the performance of the actual Project that was divided in two two-year phases. At its very origin the ... -
Procesos que afectan a la movilidad del U y otros elementos traza en entornos graníticos y a baja temperatura. Experiencias del Proyecto Berrocal
(Sociedad Geológica de España, 1996)The main processes affecting the retardation and mobility of U and other trace elements In the El Berrocal environment are presented and discussed. Particular emphasis is put in recent low temperature events that indicate ... -
Tectónica distensiva jurásica en el Subbético Externo oriental (Sureste de España)
(Sociedad Geológica de España, 1996)The stratigraphy and evolution of the subsidence during the Jurassic in an eastern section of the External Subbetic (External Zones of the Betic Cordilleras) have been analized. Backstripping curves are constructed, and ... -
Génesis de las mineralizaciones de Ge asociadas a esfaleritas portadoras de fluidos "incompatibles" del Cerro del Toro (Alpujárride, SE de España)
(Sociedad Geológica de España, 1996)The problem addressed in this article is a te n ta tiv e explanation o f the coexistence of partially miscible "ncompatible" fluids in different primary inclusions of the same crystal (or group of crystals). It is based ... -
Un yacimiento de Au en carbonates del Orógeno Hercínico: el área de Salamón (N León)
(Sociedad Geológica de España, 1996)The Salamon gold prospect constitutes an example o f carbonate-hosted gold deposit formed during the last events of the Hercynian orogeny. It is formed by a complex paragenetic sequence o f Au-As-Sb-Hg-Cu-NI-Co-Pb-Zn-U ... -
Procesos de interacción agua-roca y comportamiento del uranio en el sistema granítico de El Berrocal (España)
(Sociedad Geológica de España, 1996)This work depicts a synthesis of the main water-rock interaction processes controlling the water chemistry in El Berrocal granitic pluton, emphasizing in the uranium geochemistry. An uranium-sulphide dyke controls the ... -
834S de los sulfuros silúricos tipo "sedex" de Latedo-Sejas de Aliste (Zamora, España)
(Sociedad Geológica de España, 1996)The sulphides of Latedo-Sejas are mainly constituted of pyrite-pyrrhotite and, on the basis of their textural and structural characteristics, two mineralógicaI stages have been differentiated: syn-diagenetic and/or metamorphic ... -
Cambios ambientales cretácicos en Asia oriental y meridional: El paso Cenomaniense-Turoniense en el Tibet meridional
(Sociedad Geológica de España, 1996)Fossil assemblages consist on foraminifera and rare ostracodes; all samples have been quantitativelystudied. Planktonic foraminifera allow us to characterise the Rotalipora cushmani Whiteinella archaeocretacea and ... -
Estudio preliminar sobre la tectónica sinsedimentaria del Cretácico inferior en el borde septentrional de la Cubeta de Aliaga (Cordillera Ibérica)
(Sociedad Geológica de España, 1996)The Aliaga sub-basin was developed during the Early Cretaceous in an extensional context. Structures near the northern border of this sub-basin (normal faults, syntectonic unconformities and facies and thickness changes ... -
Estudio comparativo de las morfologías de crecimiento teórica y experimental de cristales de malaquita
(Sociedad Geológica de España, 1996)The growth of malachite has been studied in a system involving the counter diffusion of Cu2+ and C 0 3” through a silica gel column . The growth morphologies obtained are interpreted on the basis of the supersaturation ... -
Albititas metasomáticas y venas de cuarzo en los leucogranitos de Burguillos del Cerro (España). Modelo de evolución hidrotermal basado en el estudio de inclusiones fluidas
(Sociedad Geológica de España, 1996)Slightly peraluminous to metaluminous leucogranites are common as dyke swarms in the Burguillos del Cerro Plutonic Complex. They show superimposed hydrothermal alterations consisting of quartzrich albitites and Au-bearing ... -
Aplicación del modelo paramétrico de vulnerabilidad Drastic en el tramo terminal del río Torderá
(Sociedad Geológica de España, 1996)The parametric model Drastic (acronym of Deep water; Recharge, net; Aquifer media; Soil media; Topography; Impact of vadose zone; Conductivity, hydraulic) is applied to the terminal stretch of Tordera River (in the Catalan ... -
Aplicaciones en la producción de materiales vitrocerámicos de residuos minerales de canteras y serrerías de granito
(Sociedad Geológica de España, 1996)Since time the different mineral phases which constitute the granite rocks have been proposed and used as raw material for the manufacturing of ceramics and glasses. More recently, due to the environmental and storage ... -
Aspectos geológicos: Litología y estructura a escala local y de emplazamiento
(Sociedad Geológica de España, 1996)The current research carried out in the El Berrocal Test Site belongs to the Project "Characterization and validation of the radionuclide migration processes under real conditions in a fracture granitic environment ", in ... -
Actividades del Grupo de Trabajo de Geología y Metalogenia de Depósitos Hidrotermales Submarinos (Proyecto P.I.C.G. ne 318)
(Sociedad Geológica de España, 1996)The Spanish working group on “Geology and Metallogeny of Seafloor Hydrothermal Deposits"(IGCP project 318) has concentrated research in four areas: 1) Las Herrerías deposit, Vera-Garrucha basin (SE iberia): an interesting ... -
Aspectos químicos de la magnetita y clorita de las "ironstones" ordovicicas de Zamora (España)
(Sociedad Geológica de España, 1996)The chemical characteristics of the magnetites and the chlorites from Ordovician ironstones of Zamora are described in this paper. The unusually Hig contents of Ti, V, Cr. Ba and Ni magnetite indicates, probably, the ... -
Geoquímica de los fluidos asociados a estructuras filonianas mesozoicas del anticlinal de Talayuelas (Cordillera Ibérica, Cuenca)
(Sociedad Geológica de España, 1996)In the Talayuelas anticline (Cuenca province, Iberian Ranges) many quartz-siderite and barite ± quartz veins associated to Mesozoic faulting are found. They reflect an intense hydrothermal activity dominated by upwelling ... -
Formación de grafito a partir de fluidos: La mineralización de Huelma (Jaén)
(Sociedad Geológica de España, 1996)The volcanic-hosted graphite mineralization of Huelma Qaén) has been studied in order to stablish the mineralogical characteristics and mechanisms of formation. The graphite is highly ordered (as revealed by XRD and Raman ... -
Fluidos asociados a filones de cuarzo en la Sierra de Guadarrama. Sistema Central Español
(Sociedad Geológica de España, 1996)Fluids together with alteration were studied in representative hydrothermal barren quartz veins from central part o f Sierra de Guadarrama (Spain). Three types o f fluids have been distinguished: (i) an early fluid stage ...
