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Geogaceta -- Nº 20-3, (1996)
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Tipología del plutón de Campanario-La Haba: implicaciones petrogenéticas
(Sociedad Geológica de España, 1996)The Campanario-La Haba pluton is located in the suothern part of the Central-Iberian Zone. It is a coarse-grained 5 type granitoid with cordierite. Typologicaly, this pluton is a peraluminous granitoid , CCA type. Mineralogy ... -
Termobarometría núcleo-borde en granates con zonado difusíonal: El ejemplo del Domo Gneísico del Tormes, NO de Salamanca
(Sociedad Geológica de España, 1996)Metapelites and add orthogneisses from the Lower Unit of the Tormes Gneissic Dome, NW Salamanca, contain high-grade mineral assemblages with characteristics diffusional zoned garnets, The P-T path deduced for this unit ... -
Stratigraphic and Paleogeographic Reconstuction of Mount Arcuentu-Funtanazza Tertiary Succession (Central-Western Sardinia, Italy)
(Sociedad Geológica de España, 1996)The stratigraphic, sedimentologic and geometric reconstruction of the Tertiary volcano-sedimentary succession cropping out in the Mt Arcuentu-Funtanazza area (Central-Western Sardinia, Italy) has allowed us to recognize ... -
Soil gas 222Rn, He, and 220Rn/222Rn ratios at Cañadas caldera, Tenerife, Canary Islands, Spain
(Sociedad Geológica de España, 1996)Soil gas 222Rn distribution suggest a close relationship with volcanic-geothermal features in and around Cañadas caldera according to both 1992 and 1995 soil gas suiveys. Three transects were selected for soil gas 222Rn, ... -
Soil volatile B and NH3 distribution prior the 1994 eruption at Rabaul caldera, Papua New Guinea
(Sociedad Geológica de España, 1996)Soil volatile B and NH3 distribution in and around Rabaul caldera were evaluated by statistical graphical methods in order to investigate the distribution pattern of these volatile components prior the 1994 eruption of ... -
Zeolites in hydromagmatic volcanoes. A case study of montaña Escachada (Tenerife)
(Sociedad Geológica de España, 1996)The different types of zeolites occurring in the hydromagmatic volcano called Montana Escachada or Montana Pelada (Southern Tenerife), have been studied. The instrumental techniques of study include X-ray diffraction, ... -
Vitrófims básales en flujos piroclásticos de composición riolítica: el caso de la unidad de Nuraxi (Sulcis, SE de la isla de Cerdeña, Italia)
(Sociedad Geológica de España, 1996)The bottom of the Nuraxi unit (Assorgia et a/., 7 990) has a vitrophiric character and the unit shows clear evidences of reomorphic flow during cooling. Both characteristics are present in other acid pyroclastic units of ... -
Silicificaciones de calizas oolíticas del Dogger en el Subbético Interno oriental: ¿silcretas freáticas?
(Sociedad Geológica de España, 1996)Cherts occurring in oolitic limestones of the Dogger in the Internal Subbetic, are studied for the first time. Two genetic hypothesis are considered from the interpretation of the stratigraphic, petrological and geochemical ... -
Rocas Ornamentales del Oriente de la Isla de Cuba
(Sociedad Geológica de España, 1996)After several years of continuos geological working, a wide view of the perspectives ornamental rocks in Oriente area of Cuba is presented. For each outcrop, its geographical location, degree of geological knowledge, real ... -
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 ... -
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 ... -
Quimismo de las lutitas del Cretácico Inferior en el sector central de la Cuenca Vasco-Cantábrica
(Sociedad Geológica de España, 1996)A lithogeochemical study of Lower Cretaceous shales (195 samples) from the Basque-Cantabrian region has been carried out to evaluate average values in major and trace elements. Mineralogy and chem ic al co n te n t o f m ... -
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 ... -
Piroxenos relictos: una clave para la interpretación del vulcanismo en la Faja Pirítica Ibérica
Fernández Martín, M. L.; Sáez Ramos, Reinaldo; Pascual Martínez, Emilio (Sociedad Geológica de España, 1996)
Relict cllnopyroxenes from strongly altered basalts sampled in the Sotiel-Torerera area (central sector of the Iberian Pyrite Belt, southwestern Iberian Massif, Spain), have been analysed by EMP. It has been found that ... -
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 ... -
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 ... -
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 ... -
Procesos de dolomitizacíón acaecidos en las sedimentitas carbonáticas del Ordovícico Inferior de la Precordillera, San Juan, República Argentina
(Sociedad Geológica de España, 1996)Dolomitization processes are recognized in the Lower Ordovician San Juan Formation, Central Argentine Precordillera. The sedimentary sequence is composed by limestones with different textures, predominantly wackestone and ... -
Primeros datos acerca de la evolución química de los Filosilicatos en el complejo Malaguide durante la fase Metamòrfica Alpina
(Sociedad Geológica de España, 1996)Compositional trends in the Maláguide Paleozoic, a very low-grade metamorphic complex of the Betlc Cordilleras, have been investigated in the Málaga area using bulk-rock mineralogy, clay mineralogy and chemical composition ... -
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, ...