Thesis Collection
Last Deposit
Browsing Geogaceta -- Nº 48, (2010) by Title
Now showing items 1-20 of 58
-
Actividad paleo-hidrotermal episódica en la Sierra de Guadarrama (Sistema Central Español): nuevas edades K-Ar y correlación tectónica con la Cordillera Ibérica
(Sociedad Geológica de España, 2010)Episodic hydrothermal alterations in the Sierra de Guadarrama took place between ca. 300 Ma and 10 Ma. New K-Ar ages for hydrothermal minerals have been obtained that along with previous data allow to better constrain ... -
Alteración diferencial de las rocas volcánicas ácidas en el sector de Riotinto, Faja Pirítica Ibérica
Donaire Romero, Teodosio
; Toscano Macías, Manuel; Valenzuela Aznar, Alfonso; González Roldán, Manuel Jesús; Pascual Martínez, Emilio (2010)
Regional hydrothermal alteration of rhyolitic rocks from the Odiel area, Iberian Pyrite belt, Spain, has been assessed through geochemical study. Disregarding volcanic facies, all rhyolites have similar immobile trace ... -
Aplicación del método de resistividades con SEV para la caracterización hidrogeológica de la cuenca de Dajla (Argelia)
(2010)The aim of this study is the hydrogeological exploration and characterization using Ceophisical surveying in the vicinity of Dakhla Basin (Algeria). To that end, it has been used the method of resistivities through Vertical ... -
Asociaciones de Foraminíferos bentónicos en los sedimentos recientes del estuario de Tina Mayor (Asturias-Cantabria)
(2010)A total of 35 species of benthic foraminifers have been taxonomically determined in recent sediments of the Tina Mayor estuary (Asturias-Cantabria provinces, N. Spain). Alive individuals belonging to 22 species, reach up ... -
Bioestratigrafía basada en foraminíferos planctónicos para el Mioceno superior y Plioceno de la Cuenca del Bajo Segura (Cordillera Bética oriental)
(2010)The planktonic foraminifers biostratigraphy is crucial in order to precise the timing of the main tectono- sedimentary and palaeogeographic events through the evolution of the Bajo Segura Basin. Our results indicates that ... -
Características mineralógicas de los sedimentos aluviales holocenos del Barranco Grande (Bardenas Reales de Navarra)
(2010)Mineralogical composition of Holocene alluvial deposits from Bardenas Reales of Navarra is studied and compared with the Miocene mudrock substratum. An Early Holocene muddy-silty unit and another Middle-Upper Holocene sandy ... -
Caracterización del funcionamiento hidrológico de la laguna de Zóñar (Andalucía, España). Implicaciones de la extracción de aguas subterráneas en la evolución del nivel de agua
(2010)This paper reports the characterization of the hydrological functioning in Zóñar lake, located in the province of Cordoba, in Southern Spain. The interpretation of morphometric indexes, together with a water budget from ... -
Caracterización petrológica de las magnesitas y las dolomías encajantes de edad Proterozoica Superior-Cámbrico Inferior, Grupo Ibor (Castañar de Ibor, Cáceres)
(2010)Detailed petrographic observations of Upper Proterozoic -Lower Cambrian deposits of the Castañar de Ibor allows the characterization of the diagenetic history of these rocks. Craywackes, shales and limestones were deposited ... -
Caracterización químico-mineralógica de las cromitas ofiolíticas de Calzadilla de los Barros (Badajoz)
(2010)The Cerro Cabrera and Sierra Cabeza Corda peridotite massifs (Calzadilla de los Barros, Badajoz) comprise serpentinites hosting podiform chromite mineralization and have been interpreted as part of an ophiolitic slab. The ... -
Concreciones de arenisca como criterio de identificación y correlación estratigráfica de regresiones forzadas. Un ejemplo desde las areniscas cretácicas de la Formación Cerrajón (Zonas Externas de la Cordillera Bética)
(2010)Calcite-cemented concretions were studied from Lower Cretaceous forced-regressive shoreface sandstones (Cerrajón Fm, External Zones, Betic Cordillera). During early diagenetic, patchy calcite cement consolidates clean and ... -
Condicionantes genéticos de las formas kársticas de El Torcal de Antequera (Cordillera Bética)
(2010)The stunning landscape of TI Torcal de Antequera has produced a number of descriptive works; nevertheless, few of them present a genetic approach and, in this case, propose an essential role of differential physical ... -
Contaminación actual del acuífero aluvial de los ríos Agrio y Guadiamar (Aznalcollar, España)
In April 1998 the breakage of the pyritic tailings dam of Aznacóllar mines occurred and approximately 2 hm3 of sludges and 4 hm3 of acidic waters spilled to the Agrio and Guadiamar rivesr. The environmental disaster was ... -
Costras ferromanganesíferas pelágicas inducidas por comunidades bentónicas microbianas en el límite Jurásico Medio-Superior (Subbético Externo, provincia de Córdoba)
(2010)A hardground with Fe-Mn crusts of an important Middle-Upper Jurassic stratigraphic discontinuity in the External Subbetic has been analysed. These are mainly hydrogenetic-biogenic crusts induced by the activity of benthic ... -
Datación de silcretas a través de ópalos con uranio. Un estudio preliminar en el Mioceno, área de Paracuellos de Jarama (Cuenca de Madrid)
(2010)U-Pb-series analyses of two U-rich opal samples have been used for dating silcretes included in Miocene rocks in the Paracuellos zone (Madrid Basin.) A sensitive high-resolution ion microprobe (SHRIMP) was used. The silcretes ... -
Deformación en yesos del Triásico en el sector oriental de la Falla de Socovos (sureste de España)
(2010)A Triassic gypsiferous formation is juxtaposed to the Socovos Fault along its eastern portion. Here, the gypsum shows penetrative cataclastic fabrics, particularly prominent in the main fault zone. The fabrics show a profuse ... -
Development of "lozenges" in anastomosing shear zone networks in foliated rocks
(2010)En el contexto de zonas de cizalla anastomosadas, los «lozenges» son cuerpos elipsoidales relativamente menos deformados que las rocas envolventes. En este trabajo de investigación se propone una tipología en 2-D de ... -
Dientes de arcosaurios (Crocodyliformes, Theropoda) del Jurásico Superior de Buñol (Valencia)
(2010)Five isolated archosaurian teeth from Valencia province (eastern Spain) are studied in this work. They have been found in the «Cantera Carcalín» site, an outcrop of the marine Higueruelas Formation (Tithonian) in the ... -
Diques de lamproítas a lo largo de la Falla de Socovos (Béticas orientales)
(2010)The Calasparra segment of the Socovos Fault shows a large number of lamproite outcrops, most of them being dikes emplaced along tension gashes and Riedel faults. Subsequently to the emplacement, some of the dikes were ... -
El antiguo deslizamiento rocoso del Peñón de Ocenilla (Sierra de Cabrejas, Cordillera Ibérica, Soria)
(2010)A large-dimension rockslide occurred at one end of the 80 m high calcareous cliff face of the so-called Peñón de Ocenilla, where the inclination of the dip is 12° greater than the slope. A large mass of limestone and marly ... -
El balance hidrico del acuífero Motril-Salobreña: Estudios previos y cálculo mediante modelación numérica
(2010)Motril-Salobreña aquifer has been exhaustively monitored from 2001 to 2007 and with the new data a flow model with MODFLOW was developed. The water balance has been established for each one of the last 6 years. During this ...
