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Geogaceta -- Nº 37, (2004)
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Variación estacional en la especiación y movilidad de Fe y As en aguas afectadas por drenajes ácidos de mina en la cuenca del río Odiel (Huelva)
Miguel Sarmiento, Aguasanta
; Casiot, C.; Nieto Liñán, José Miguel; Elbaz Poulichet, F.; Olías Álvarez, Manuel (Sociedad Geológica de España, 2004)
The Odiel river drains the central part of the Iberian Pyrite Belt, one of the oldest and most important massive sulphide districts in the world. In these massive sulphide deposits, arsenic can be found in arsenical pyrite ... -
Uso de técnicas geofísicas para caracterizar la extrusión de agua salina en un acuífero costero mediterráneo bicapa (Río Vélez, provincia de Málaga)
(Sociedad Geológica de España, 2004)The river Vélez delta (Malaga province) is a two-layer aquifer. The groundwater overexploitation during the 1993-1995 drought period led to a quite general seawater intrusion in both layers, particularly severe in the ... -
Tonalites from the Hospitais massif (Ossa-Morena Zone, SW Iberian Massif, Portugal) II: Geochemistry and petrogenesis
(Sociedad Geológica de España, 2004)As described in the first part of this work (Moita et al., this volume), the Hospitais Massif belongs to a synorogenic Variscan magmatic association, intrusive in a gneissic-migmatitic complex of the Évora High- Grade ... -
Tonalites from the Hospitais Massif (Ossa-Morena Zone, SW Iberian Massif, Portugal) I: Geological setting and petrography
(Sociedad Geológica de España, 2004)The Hospitais Massif is an elliptical-shaped plutonic body, with a WNW-ESE long axis, located in the western Ossa-Morena Zone domains in Portugal. This massif, composed essentially of tonalites, is part of an igneous ... -
Sobre la utilización de la clasificación de las aguas de riego del U.S. Laboratory Salinity (USLS)
Olías Álvarez, Manuel; Cerón García, Juan Carlos; Fernández, I. (Sociedad Geológica de España, 2004)
One of most used methods in our country to determinate the soil salinisation and sodification risk from the irrigation water composition is the U.S. Salinity Laboratory (USLS) classification, which used the electrical ... -
Secuencias acumulativas en el Complejo Plutónico de Valencia del Ventoso
(Sociedad Geológica de España, 2004)In the Valencia del Ventoso plutonic complex it has been detected the basal part of a previous stock formed by cumulates. This accumulative sequence is subdivided in base of textural criteria in five zones, called from ... -
Rasgos morfológicos e icnológicos de la superficie erosiva del límite Messiniense-Plioceno (Sierra del Colmenar, Alicante). Relación con la crisis de salinidad del Mediterráneo
(Sociedad Geológica de España, 2004)The Messinian/Pliocene boundary in the Sierra del Colmenar (Alicante) is represented by an erosional surface called the end-Messinian unconformity. This erosional surface cuts the coastal and lagoonal deposits of the ... -
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 ... -
Profundidad de la transición dúctil-frágil en la corteza de Béticas-Rif y Mar de Alborán
(Sociedad Geológica de España, 2004)A three dimensional rheological model has been developed in the Betic-Rif and Alboran Sea region to characterize the brittle-ductile transition (BDT) in the upper crust; calculating a multiple set of regularlyspaced strength ... -
Primeros restos de vertebrados del Cretácico superior de Quecedo de Valdivielso (Burgos)
(Sociedad Geológica de España, 2004)Chelonian plates, fish scales and crocodilian remains from the uppermost Cretaceous of the Burgos Province are described for the first time. All the remains have been found in the argilites of the Sobrepeña Formation ( ... -
Primera descripción de capas de esquistos cloríticos con circón en las peridotitas de Ronda (Cordilleras Béticas)
(Sociedad Geológica de España, 2004)This work reports the finding of layers of zircon-bearing chlorite schists in the southwestern part of the Sierra Bermeja peridotites, the biggest massif of the Ronda peridotites (Alpujarride Complex, Betic Cordillera, southern ... -
¿Por qué son tan diferentes las sierras de Crevillente y Abanilla?
(Sociedad Geológica de España, 2004)The Crevillente and Abanilla mountain ranges form the same structural lineation but show a quite different morphology. The first one is made by calcareous rocks mainly jurassic and cretaceous likewise the Abanilla is ... -
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 ... -
Origen de circones detríticos ricos en Hf de São João del Rei, Minas Gerais (Brasil)
Sáez Ramos, Reinaldo; Pereira, R. M.; Carrasco, R.; Nieto Liñán, José Miguel (Sociedad Geológica de España, 2004)
Heavy concentrates obtained by pane sampling on several creeks near São João del Rei, Minas Gerais (Brasil) provide unusual Hf-rich zircons. Image and chemical analyses performed on these zircons by SEM and LA-ICP-MS ... -
Niveles escalonados de cuevas marinas cuaternarias en la costa oriental de Gibraltar
Rodríguez Vidal, Joaquín; Cáceres Puro, Luis Miguel (Sociedad Geológica de España, 2004)
Several sets of staircased Quaternary marine deposits can be observed along the Gibraltar coast ranging from 1 to 210 m above the present mean sea level. Geomorphological mapping establishes, from the relationship between ... -
Modificación diagenética temprana de las conchas de inocerámido (Bivalvia). Maastrichtiense inferior. Cuenca Vasco-Cantábrica
(Sociedad Geológica de España, 2004)The petrographic analysis of the inoceramid shells allows to identify some microstructures, which suggest their early modification, previously and during the first burial stages. In this sense, it is important to ... -
Microestructura e interrupciones en el crecimiento de las conchas de inocerámido (Bivalvia) del Maastrichtiense inferior. Cuenca Vasco-Cantábrica
(Sociedad Geológica de España, 2004)Lower Maastrichtian inoceramid shells from the Basque-Cantabrian Basin were deposited in a carbonate deep-sea environment. The referred shells show a well-developed first order prismatic microstructure formed by crystals ... -
Los ostrácodos del horizonte glauconítico inferior de la Formación “Arcillas de Gibraleón” (Depresión del Guadalquivir, SO España)
Ruiz Muñoz, Francisco; Abad de los Santos, Manuel; Pendón Martín, José Gabriel; González-Regalado Montero, María Luz; Rosa Díaz, Jesús de la; Tosquella Angrill, Josep (Sociedad Geológica de España, 2004)
The analysis of the ostracod assemblages collected in the lower glauconitic horizon of the Arcillas de Gibraleon Formation permits to delimitate two levels: a) Basal level, with the presence of infralittoral, outer ... -
Nuevos mamíferos vallesienses en Masía de La Roma (Cuenca de Teruel)
(Sociedad Geológica de España, 2004)The number of upper Vallesian (continental Upper Miocene) localities in the Teruel-Alfambra area has been increased by the sampling of a new road cut at Masia de La Roma. Two new levels have been sampled (MR-604-A and ... -
Nuevos datos sobre estratigrafía del Ordovícico y estructura varisca en el Macizo de Santa María la Real de Nieva
(Sociedad Geológica de España, 2004)We present a new geological map of the lower Ordovician materials cropping out in the Santa Maria la Real de Nieva Massif. The Ordovician sequence, Fm. Capas de Domingo García, comprises two separate stratigraphic units. ...
