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Browsing by Author "Gil Ibarguchi, José Ignacio"
Now showing items 1-19 of 19
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Achnelitos generados en fuentes de lava de la región volcánica de Campo de Calatrava (Ciudad Real, España)
(Sociedad Geológica de España, 2013)We describe and discuss the origin of achneliths that occur within ash and lapilli tephra emitted by the Las Herrerías volcano of the Campo de Calatrava Volcanic Field (CCVF, Ciudad Real, Spain). These ash-size ... -
Análisis de isótopos de oxígeno y edad Rb-Sr del plutón zonado de Caldas de Reyes (Galicia, España)
(Sociedad Geológica de España, 1989)Oxygen and strontium isotope composition of the external and external-leucocratic facies suggest an origin essentially by partial meeting of crustal materials for the postkinematic Caldas de Reyes granitic s.l. massif. On ... -
Application of specific extraction chromatographic methods to the Rb-Sr, Sm-Nd isotope study of geological samples: The Hombreiro-Santa Eulalia Granite (Lugo, NW Spain)
(Sociedad Geológica de España, 1996)The analytical application to geological samples of three new chromatographic resins, TRU-Spec ®, Sr-Spec ® and LN-Spec ®) has been investigated. Seven samples of the Hombreiro massif (Lugo, NW Spain) have been studied, ... -
Composición isotópica del Pb en galenas de la región de la Falla de Azuaga. Aportaciones al modelo plumbotectónico de la Zona de Ossa-Morena
(2007)New Pb isotopic analyses have been obtained on twenty samples of galena from the Azuaga area. In spite of the overall homogeneity, the results for samples to the North of the Azuaga Fault are perceptible different from ... -
Eclogitas de la banda de Cizalla Badajoz-Córdoba (Suroeste de España). Datos petrográficos y significado geodinámico
(Sociedad Geológica de España, 1989)C-type eclogites occur within garnet-amphibo/ites of the Azuaga gneisses a/lochthon in the Badajoz-Córdoba shear belt (SW Spain). The eclogites were formed under conditions of ca. 600º C, > 73 Kbar, and record a complex ... -
Estudio de la composición isotópica del Pb en galenas del distrito minero de Linares-La Carolina (Jaén, España)
(Sociedad Geológica de España, 2003)New lead Isotope results for twenty-four galenas of the Linares-La Carolina mining district (Jaén, Spain) are reported. While two.mineralization types, one near Linares (where filons with low Ag content crosscut the Linares ... -
First shrimp-ages on pyroxenites, eclogites and granites of the Ronda complex and its country-rocks
(Sociedad Geológica de España, 1996)U-Pb shrimp dating of magmatic and metamorphic domains of zircons from various rocks of the Ronda Peridotites (Betic Cordilleras, SE Spain) and their country rocks gave the following results: An extensional stage at ca 780 ... -
Geocronologia del plutón de Campanario-La Haba (Badajoz) a partir del análisis de isótopos de Pb en circones y U-Th-Pbtota| en monacitas
(Sociedad Geológica de España, 2003)The Campanario-La Haba pluton is located to the north of the Los Pedroches batholith in the southern part of the Central-lberian Zone. The age of the emplacement had been established between 304 and 314 Ma using K-Ar and ... -
Los diques traquiandesíticos asociados al plutón granodiorítico de los Pedroches (batolito de los Pedroches, España)
(Sociedad Geológica de España, 1996)The Los Pedroches batholith is cross cut by an important dyke complex, particularly well developed in the central sector. Dykes are mainly trachyandesite, rhyolite, whole emplacement history of the Los Pedroches batholith ... -
Metamorfismo y geotermobarometría de la Unidad de Yunquera en Casarabonela (Complejo Alpujárride, Málaga)
(Sociedad Geológica de España, 2004)The rocks of the Yunquera Unit (Alpujárride Complex) record two stages, at least, of recrystallization at different P-T conditions defined by the mineral associations: a) Grt + Pl + Ms + St + Ky + Qtz, and b) Grt + Pl + ... -
Morfología, petrografía y geoquímica del spatter densamente soldado ( lava-like ) del volcán Cerro Gordo (Campo Volcánico de Calatrava, Ciudad Real)
(Sociedad Geológica de España, 2019)En la ladera SE del cono de escorias Cerro Gordo (Región Volcánica de Campo de Calatrava) aflora un depósito de spatter de 9,4 m de potencia que incluye varios niveles decimétricos densamente soldados. Estos niveles presentan ... -
On the association of Magmatic Microgranular Enclaves (MMEs) and cordierite-bearing monzogranites at the Sierra Bermeja Pluton (SW Spain)
(Sociedad Geológica de España, 2021)Magmatic Microgranular Enclaves (MMEs) included in the cordierite-bearing monzogranites of the Sierra Bermeja Pluton (southern Iberian Massif) have been examined to elucidate their possible petrogenetic linkage. Mineralogical ... -
Organización interna de unidades de alta presión en dominios tectónicos profundos (Complejo de Cabo Ortegal, NO España)
(Sociedad Geológica de España, 2003)High-pressure volcanic-arc granulites, N-MORB eclogites and shallow crustal volcanosedimentary high-pressure gneiss units occur in the high-pressure metamorphic fold-nappes and ductile thrusts that make up the Cabo Ortegal ... -
Petrografía y condiciones de formación de las rocas ultramáficas con granate asociadas a las eclogitas de Cabo Ortegal
(Sociedad Geológica de España, 2004)Garnet-bearing ultramafic rocks forming a decametric outcrop occur associated to the eclogites of the upper catazonal unit of the Cabo Ortegal Complex. These ultramafites are included within variably mylonitized ... -
Presencia de cenizas y lapilli esferoidales con estructura interna concéntrica (i.e. pelletal lapilli o spinning droplets) en la tefra del volcán Cabezo Segura (Región Volcánica de Calatrava, Ciudad Real)
(2009)The Cabezo Segura volcano is located in the central part of the Calatrava Volcanic Province. Some deposits of this volcano are formed by singular spherical lapilli and bombs. These lapilli and bombs are the result of ... -
Rasgos estructurales de la formación granulítica de alta presión de la Bacariza (Cabo Ortegal, NO España)
(Sociedad Geológica de España, 2001)Heterogeneous ductile deformation occurred in the Bacariza formation coeval with hercynian high-pressure granulite facies metamorphism. Eye and anvil fold structures in YZ structural sections have been identified in several ... -
A single subduction event at ca. 392 Ma for the ultramafic-mafic HP/HT-rocks of the Cabo Ortega I Complex
(Sociedad Geológica de España, 1996)SHRIMP-dating of zircons from ultramafic, mafic and metasedimentary high-pressure (HP) rocks of Cabo Ortegal gave the following results: The MORB-type protoliths of the eclogites are Cambrian (507±7 7 Ma). Their transformation ... -
Ultramilonitas de apariencia fluidal, pseudotaquilitas o algo intermedio? (Formación Bacariza, Cabo Ortegal)
(Sociedad Geológica de España, 2006)Occurrence of tectonites with features characteristic of both pseudotachylytes and ultramylonites formed under high-pressure granulite-facies conditions is reported in the Cabo Ortegal Complex of NW Spain. We interpret ... -
Vulcanismo lávico y explosivo en la cuenca carbonífera de Los Santos de Maimona (Zona de Ossa-Morena, Badajoz)
(Sociedad Geológica de España, 2004)We report the results of a petrological and structural study on the volcanic rocks from the Los Santos de Maimona Carboniferous basin (Ossa-Morena Zone, SW Spain). This basin is ca. 25 km in length and up to 3 km wide ...
