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Geogaceta -- Nº 20-7, (1996)
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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 ... -
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. ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Relación entre metamorfismo y mineralización en las rocas básicas y ultrabásicas de Mina Salamanca y los Gateados (Provincia de Mendoza, Argentina)
(Sociedad Geológica de España, 1996)The basic and ultrabasic rocks from Mina Salamanca district and Los Gateados area are metamorphosed in epidote-amphibolite facies, and locally, in greenschist facies conditions. The green chist facies assemblages develop ... -
Pirofanita y Braunita titànica en las rocas con Mn del Sector Central de Ossa-Morena
(Sociedad Geológica de España, 1996)In the Oliva de la Frontera area (Ossa-Morena Central Belt, Iberian Massif, SW Spain) titanian braunite occurs in manganiferous metashales and manganiferous metatuffs while pyrophanite is restricted to pyroxmangite metatuffs. ... -
Peloides de glauconita y apatito en sedimentos carbonatados mesozoicos del sector oriental de la Zona Subbética (provincia de Alicante)
(Sociedad Geológica de España, 1996)Glauconite and apatite peloids occur in jurassic and cretaceous bioclast-bearing carbonate rocks from the Algayat-Crevillente Unit (Subbetic Zone). The size and the morphology of peloids are controlled by the bioclasts. ... -
Metamorfismo y magmatismo del Paleozoico inferior en la zona central de las Sierras Pampeanas (SW de Gondwana)
(Sociedad Geológica de España, 1996)The Sierra de Los Llanos intrusion is a Lower Paleozoic pluton of meta-aluminous granites (with tholeiitic and calc-alkaline features) representative of batholiths of the Sierras Pampeanas, here associated to small bodies ... -
Los pisos estratigráficos y la paleogeografía del Cámbrico en España: una visión retrospectiva
(Sociedad Geológica de España, 1996)The Cambrian biostratigraphy and chronostratigraphy of the Iberian Peninsula has been studied since the beginning of the past decade by the Spanish Working Croup of the ICCP projects, 29 and 303, followed by palaeogeographical ... -
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 ... -
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 ... -
Origen de escapolitas asociadas a doleritas triásicas del Norte de la provincia de Cádiz
(Sociedad Geológica de España, 1996)Scapolites are present in some doleritic tectonic blocks C'ophites" )in the External Zones o f the Betic Cordilleras, In Northern of Cadiz province. These scapolites fill veinlets and replace plagioclases from the dolerites ... -
Nuevos datos geológicos sobre las mineralizaciones de grafito de la Banda Metamorfica de Aracena, Huelva (Macizo Ibérico Meridional)
Fernández Rodríguez, Carlos
; Fernández Caliani, Juan Carlos; Miras, A.; Barrenechea, J. F.; Luque, F. J.; Rodas, M. (Sociedad Geológica de España, 1996)
In this work a detailed geological map o f the graphite mineralizations of the Aracena Metamorphic Belt (SW Iberian Massif) is shown. Three types of mineralizations have been distinguished according to lithostratigraphic ... -
Minerales de tierras raras en las carbonatitas del Complejo Basal de Fuerteventura (Islas Canarias)
(Sociedad Geológica de España, 1996)The Fuerteventura carbonatites appear in the Complejo Basal as veins, breccias and shear bands in the coastline between Puerto de la Pena and Cueva de Lobos, and in the Esquinzo ravine zone. These carbonatites are formed ... -
Las mineralizaciones de U de la Carretona y Casa del Gallo En el granito de Albala (Câceres)
(Sociedad Geológica de España, 1996)The U mineralizations that are estudied in this paper are hosted in Albalagranite.They are controled by late Hercinian vertical or subvertical faults, with an aproximate orientation of N30°E. The mineral association in ... -
Las mineralizaciones de wolframio asociadas a la granodiorita de Santa Coloma (Andorra)
(Sociedad Geológica de España, 1996)The late Hercynian Santa Coloma granodiorite intruded Paleozoic metasediments of upper Ordovician to Devonian age. Several forms of tungsten-bearing ores are found associated to the Santa Coloma granodiorite in the Central ... -
Las mineralizaciones auríferas de los Pirineos y su significado en la evolución del orógeno Hercínico
(Sociedad Geológica de España, 1996)G old is found in the Hercynian terranes of Central and Eastern Pyrenees as disseminations in metasediments of lower Paleozoic age; in veins contemporaneous with the main Hercynian foliation; in veins related to the Hercynian ...
