Thesis Collection
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Browsing Geogaceta -- Nº 20-3, (1996) by Issue Date
Now showing items 1-20 of 66
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Origen diagenètico de cementos carbonatados en nodulos de areniscas (Plioceno de Lebrija, Sevilla)
(Sociedad Geológica de España, 1996)The origin of carbonate cements of sandstone nodules from Pliocene deposits of Lebrija (Seville, SW Guadalquivir Valley) has been studied. The nodules are included in densely bioturbated finegrained sandstones and contain ... -
Las traquitas de Arenys d'Empordá (Alt Empordá, NE de la Península Ibérica): características generales
(Sociedad Geológica de España, 1996)A new outcrop of neogene trachytic rocks has been found at Arenys d'Emporda (Alt Emporda, NE Spain). These trachytes and the associated alkali basalts must be related to the Vilopriu set of faults. The trachytes are mainly ... -
Relationship between magnetite chemistry and magnetic susceptibility of igneous rocks: Implications for sedimentary provenance studies
(Sociedad Geológica de España, 1996)A direct relationship between magnetite chemistry and rock magnetic susceptibility has been found. Electron probe microanalysis of titanomagnetites from various igneous rocks has shown them to be enriched in either the ... -
Caracterización de las Calizas de Almayate (Malaga) y evaluación de la calidad técnica como Materiales de Construcción
Carretero, María Isabel; Mayoral Alfaro, Eduardo
; Galán Huertos, Emilio (Sociedad Geológica de España, 1996)
Since XVIII century, Miocene-Pliocene limestones from Almayate (Málaga) were used In historical buildings o f Western Andalusian Heritage. They are sandy bioclastic limestones, w it h high p o ro s ity and water absorption, ... -
Patologías del hormigón. Interacción entre el ataque por Sulfatos y la reacción Álcali-Árido
(Sociedad Geológica de España, 1996)The presence of both alkali-aggregate reaction and sulphate attack products In concrete samples has lead to the necessity of determining the formation sequence of such products. M.E.B.-E.D.X. studies have confirmed that ... -
El Olivino de las rocas volcánicas miocenas de la isla de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)Olivine phenocrysts are always present in the Miocene basalts of Fuerteventura, whilst they are scarce in the trachybasaltic types. Notwithstanding, olivine is common as part of the groundmass in these trachybasalts. This ... -
Evolución térmica artificial del Azabache Asturiano. Estudio preliminar de la variación de sus propiedades Físico-Químicas
(Sociedad Geológica de España, 1996)In this work the variation of the physico-chemical properties of the Asturian Jurassic Jet during its artificial thermal evolution are studied by means of the open pyrolysis system . Petrographic and geochemical results ... -
Rocas granitoides calcoalcalinas altas en potasio en la Zona Centroibérica: el área Garlitos-El Borracho
Donaire Romero, Teodosio; Pascual Martínez, Emilio; Higueras, Pablo L.; Morata Céspedes, Diego (Sociedad Geológica de España, 1996)
New petrographic and chemical data on the Garlitos pluton and other associated igneous rocks in the Almadén area have shown a high-K calc-alkaline character and clear simiarities with other calc-alkaline granitoids, in ... -
Influencia del contenido en Inertinita de los carbones en la eficacia de combustión
(Sociedad Geológica de España, 1996)There is the common belief that coal macerals of inertinite group are essentially inert in any conversion process. Particularly, the low plastic properties achieved by inertinite during the pyrolysis stage of coal combustion ... -
Procesos geotérmicos causados por la circulación del agua subterránea en el contacto entre ¡a Sierra de Cameros y la Depresión Terciaria del Ebro
(Sociedad Geológica de España, 1996)The practically important part of geothermal systems belong to the convective type where the termal energy is transported by movement of groundwater. Both geothermics and hydrology (aquifer geometry and groundwater flow ... -
La dolomitización de la base de la Formación «Dolomías de Landete» en la Sierra de Espadan, (Castellón): datos de geoquímica isotópica (C, O y Sr) e inclusiones fluidas
(Sociedad Geológica de España, 1996)The dolomitization affecting the basal facies of the «Landete Dolostone» Formation in Sierra de Espadán (Castellón Province, Iberian Ranges) has been studied using fluid inclusions, stable (C and O) and radiogenic (Sr) ... -
Precisiones terminológicas entre mecanismos de fragmentación y emplazamiento de rocas volcanoclásticas
(Sociedad Geológica de España, 1996)Recent volc anic erup tion s have p ro v id e d firs t-h a n d data fo r the study o f «pyroclastic» deposit mechanisms. This study adds to the term «pyroclastic» a depositional meaning. As a result of this expanded meaning, ... -
Características composicionales y procesos de evolución magmàtica en el complejo volcánico sur-lll de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)The Southern Volcanic Complex III is form ed by basalts, a lesser am o u n t o f trachybasalts and some scarce trachytes, a ll o f them m ild ly alkaline. Crystal fra ction ation w a s in an early stage, controle d by ... -
Dolomitización bajo superficies de ruptura sedimentaria: estudio comparativo de las dolomías del Turoniense-Coniaciense (El Ribero) y Maastrichtiense superior (Quecedo) del Norte de Burgos (España)
(Sociedad Geológica de España, 1996)Substantial dolomitization and calcitization processes occurred in upper Turonian-lower Coniacian and upper Maastrichtian-lower Danian carbonates at El Ribero and Quecedo sections, respectively. Carbonate precipitation ... -
Caracterización tecnológica de las materias primas Cerámicas de La Sagra (Toledo)
(Sociedad Geológica de España, 1996)This work approaches the study and technological characterization of the clayey and not clayey raw materials, used in the ceramic brick industry in «La Sagra», Toledo province. In addition to the mineralogical an chemical ... -
Mecanismos de emisión, transporte y depósito de las Ignimbritas Roque Nublo (Gran Canaria, Islas Canarias)
(Sociedad Geológica de España, 1996)The Roque Nublo non-welded, lithic rich, ignimbrites are the most characteristic deposits of the second magmatic cycle (Pliocene in age) on Gran Canaria. They originated from vulcanianphreatom agmatic type eruptions wich ... -
Propiedades cerámicas de las pizarras de la Cuenca Carbonífera de Puertollano (Ciudad Real) : Estudio preliminar
(Sociedad Geológica de España, 1996)This paper deals with the preliminary study of the possible ceramic applications of wastes generated in the coal mines of Puertollano (Ciudad Real - Spain). The mineralogical and chemical composition, as wells as the ... -
Análisis multivariante de datos químicos en Granitoides Tardihereinicos
(Sociedad Geológica de España, 1996)The application of multivariate analysis to whole rock chemical data allow us to obtain important conclusions about their particular evolutive history. In the example developed below, starting from one population of ... -
Condiciones metamórficas de las metabasitas del Roc de Frausa (Pirineos Orientales)
(Sociedad Geológica de España, 1996)An approach to the metamorphic conditions based in mineral paragenesis of metabasites from different areas of Roc de Frausa Massif has been made. Regional peak metamorphism is showed by the metamorphic paragenesis in ... -
Petrografía, por técnicas digitales, de las adiciones de Filler Calizo. Metodología
(Sociedad Geológica de España, 1996)This article describe the different stages in the processing of images obtained for characterizing several parameters of a calcareous filler (grain size, microfractography, etc). From the parameter Cx and C , we obtain a ...
