Thesis Collection
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Browsing Geogaceta -- Nº 20-7, (1996) by Issue Date
Now showing items 1-20 of 69
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Estudio comparativo de los minerales de la fracción pesada en los sedimentos de las terrazas del Río Guadalete y fondos de la Bahía de Cádiz
(Sociedad Geológica de España, 1996)Heavy minerals of sediments from bottom of the Bay of Cádiz and terraces of the Guadalete river have been studied, for establish the genetic relationships and source areas. The use of surface feature analysis using SEM ... -
Discusión sobre la estabilidad de la ferroactinolita: Experimentación vs. estimación
(Sociedad Geológica de España, 1996)Ferroactinolite is an important phase belonging to the Ca-Fe-Si-O-H system. Since late sixties, only one experimental work constraining its stability within the P-T-f02 volume is available. From this work, many authors ... -
Edad devónica (Struniense) de las mineralizaciones de Aznalcóllar (Faja Piritica Ibérica) en base a palinología
Pereira, Z.; Sáez Ramos, Reinaldo
; Pons, J. M.; Oliveira, J. T.; Moreno Garrido, María Carmen (Sociedad Geológica de España, 1996)
Black shales associated to productive horizon In the Aznalcollar mine have provided mlospore assemblages from the Uppermost Devonian (Strunian, LN Miospore Blozone of Western Europe). StratEgraphic location of black shales ... -
Geoquímica de los isótopos de azufre, carbono, oxígeno y plomo de Las mineralizaciones del paleozoico del Macizo de la Demanda(Burgos-La Rioja, España)
(Sociedad Geológica de España, 1996)Several Pb-Cu-Zn orebodies of different size and origin occur in Paleozoic materials from the D em andam as8if d /at has been m a in ly deformed by the Hercynian orogeny. Most of the here studied deposits arevein type, ... -
Biozonación del Paleógeno Inferior basada en macroforaminíferos
(Sociedad Geológica de España, 1996)An integrated biozonation of the Early Paleogene based on shallow benthic foraminifera is presented. The use of index fossil names for designating biozones in a zonation integrating many parallel index fossil groups ... -
Contribución de la mineralogía y geoquímica de arcillas al análisis de procedencia en los flyschs del Campo de Gibraltar
(Sociedad Geológica de España, 1996)Clay mineralogy Is controlled in the Campo de Gibraltar flyschs by some paleoenvironmental and dlagenetic factors, which appear differently reflected in the several units and lithologies. In fine-grained beds, clay minerals ... -
Estudio de paleoalteraciones y paleosuperficies en el marco del PICG, proyecto 317. España
(Sociedad Geológica de España, 1996)The results obtained in the IGCP project 317, by the Spanish working group, can be separated into two general subjects: 1) paleoweathering profiles developed in the Iberian Hercynian Basement and their relationship with ... -
Los depósitos minerales de pirofilita de Villa Unión (Rioja Argentina) y sus posibles aplicaciones en cerámica y vidrio
(Sociedad Geológica de España, 1996)The pyrophillite and sericite from the Mining District of Villa Union , Rioja, in Argentina arew eelknown because they are a wide area of metamorphic rocks, Precambric or Paleozoic, well distributed and communicated at ... -
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 ... -
Cambios en la dinámica litoral y nivel del mar durante el Holoceno en el Sur de Iberia y Canarias Orientales
Zazo, C.; Dabrio, Cristino José; Goy, José L.; Bardají, Teresa; Ghaleb, B.; Lario, J.; Hoyos, M.; Hillaire Marcel, Cl.; Sierro, Francisco Javier; Flores, José Abel; Silva, P. G.; Borja Barrera, Francisco (Sociedad Geológica de España, 1996)
The interaction between global factors C'global" glacio-eustatic sea-level rise) and regional factors (tectonic trend, oceanographic factor) is analyzed in different areas of the Iberian and Canary Island littoral. Sea-level ... -
El magmatismo alcalino jurásico del sector SE de la Cadena Ibérica: composición y estructura
(Sociedad Geológica de España, 1996)Jurassic volcanic rocks are well exposed in the Sierra de Javalambre (Teruel)., This multiepisodic volcanism is mainly volcaniclastic , showing a large variety of fragmentation and emplacement mechanisms, and it is ... -
Ciclicidad de alta frecuencia en la megasecuencia sinrift titónico-berriasiense. Cuenca Ibérica oriental
(Sociedad Geológica de España, 1996)In the Iberian basin, the Tithonian-Berriasian supersequence (ZB-1 2 nd order supercycle) was deposited in a subsident regime during the moderate to intense rifting stages of the Jurassic phase. The repetitive character ... -
Estudios mineralógicos y litogeoquímicos de El Berrocal
(Sociedad Geológica de España, 1996)The different materials existing in the El Berrocal pluton are characterized from a mineralogical, chemical and geochemical point of view. The influence of the alteration processes on the migration/ retention of U, Th and ... -
La evolución isotópica de los fluidos ligados a los Sistemas Hidrotermales tardi y postvariscos del Sistema Central Español
(Sociedad Geológica de España, 1996)The late to postvariscan hydrothermal activity of the Spanish Central System extends almost from ca. 300 Ma to the present. It consists of several Independent stages that can be grouped in two different hydrothermal regimes. ... -
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 ... -
Hydrogeological modeling of El Berrocal site
(Sociedad Geológica de España, 1996)Se sintetizan los principales resultados de la caracterización hidrogeológica del Berrocal. A escala regional, el régimen de flujo queda definido por la topografía. Ello conduce, en la zona de estudio, a un flujo vertical ... -
Descripción de la macla de la frondelita-rockbridgeita asociada a las pegmatitas del Macizo de L'Arize, Pirineos (Ariege)
(Sociedad Geológica de España, 1996)A cruciform intergrowth in a phosphate of the frondelite-rockbrid geite series associated with beryl-columbite pegmatites is studied on the basis of geometric considerations. The crystallographical calculations prove, for ... -
Los depósitos de Mn de La Margarita y Los Chivos, Cuba Oriental
(Sociedad Geológica de España, 1996)The stratiform ore deposits o f Los Chivos and La Margarita manganese , consist o f ore-rich beds (massive, mainly constituted by botrioidal todorokite), and ore-poor beds (todorokite cementing vulcanoclastics). They are ... -
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 ... -
Las cloritas de los cuerpos pegmatíticos del plutón de La Cabrera (Sistema Central Español)
(Sociedad Geológica de España, 1996)The chlorites included within the pegmatitic bodies of the La Cabrera pluton (Spanish Central System) have been studied in order to stablish their characterization, clasification and relationship with other minerals. Two ...
