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Browsing by Author "González Casado, J. M."
Now showing items 1-20 of 23
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Análisis de la deformación de los sistemas de venas y filones hidrotermales de la Península Hurd (Isla Livingston, Antártida Occidental)
(Sociedad Geológica de España, 1999)In Hurd Peninsula (Livingston Island, Western Antarctica) has been analysed the orientation of calcite c-axes and e-twin from the sparitic grains that filled the hydrothermal veins and lodes in this region. The c-axes ... -
Análisis de la fracturación asociada a las alteraciones hidrotermales de tipo Greisen y Episienita en la Sierra del Guadarrama
(Sociedad Geológica de España, 1992)Several episodes of hydrothermal activity have recently been dated in the Sierra del Guadarrama (Caballero et ai, 1992a). Stress analysis based upon the fault sets associated with 300-290 M.a. (Wlodes and greisens) and ... -
Análisis de la fracturación asociada a las alteraciones hidrotermales de tipo Greisen y Episienita en la Sierra del Guadarrama
(Sociedad Geológica de España, 1992)Several episodes of hydrothermal activity have recently been dated in the Sierra del Guadarrama (Caballero et ai, 1992a). Stress analysis based upon the fault sets associated with 300-290 M.a. (Wlodes and greisens) and ... -
Análisis de la microfracturación en la Isla Decepción, Antártida Occidental
(Sociedad Geológica de España, 1999)The micro fracture patterns in Deception Island, an active shield volcano located in (he Bransfield Strait, Antarctic Peninsula region, are studied here for the first time. 143 faults have been measured in five sites ... -
Análisis geométrico y cinemático de la Falla del Río Maro sus implicaciones en la génesis de cavidades kársticas del tipo Cueva de Nerja (Málaga, España)
(Sociedad Geológica de España, 2001)A detailed geological map of 118 fault traces that form the Rio Maro Fault Zone (Malaga, Spain) has been carried out, emphasizing their geometric and kinematics characteristics. Several fault population analysis methods ... -
Caracterización geoeléctrica de depósitos superficiales en la Antártida Occidental (Isla Livingston, Islas Shetland del Sur)
(Sociedad Geológica de España, 1999)The geophysical study of superficial deposits (mainly gravels) in ice-free areas near the seashore in the South Shetland Islands (Antarctica) allows establishing the possible existence of permafrost and buried ice bodies. ... -
Dating of hydrothermal events in the Sierra del Guadarrama, Iberian Hercynian Belt. Spain
(Sociedad Geológica de España, 1991)Preliminary results are presented on the age of the hydrothermal activity recorded in the Sierra del Guadarrama. They are among the first data generated by the 1<-Ar Spectrometry Lab. of the CSIS-UCM at Madrid. Hydrothermalites ... -
Determinación de direcciones principales de esfuerzos neotectónicos mediante el análisis del maclado mecánico de la calcita
(Sociedad Geológica de España, 2004)Pleistocene;karst¡c deposits developed into Upper Cretaceous limestones of the Prebetic zone, in the . boundary region between the Iberian and Betic chains, were sampled in order to investigate the calcite e-tyyin.occurrence ... -
Determinación de los tensores de deformación y esfuerzo en calizas mediante el estudio comparado de poblaciones de fallas y del maclado mecánico de la calcita
(Sociedad Geológica de España, 1995)The strain tensor in limestones has been calculated using the strain-gauge technique (Croshong, 1972). This method is based in the analysis of the mechanical twinning in calcite. In the same outcrops, these-results have ... -
Estructuras compresivas en el Cretácico de Patones (Borde sur del Sistema Central Español, Prov. de Madrid)
(Sociedad Geológica de España, 2002)The Spanish Central System (SCS) is an intraplate mountain range located in the central part of the Iberian Peninsula, and consists, for the most part, of piutonic and metamorphic rocks belonging to the Hercynian basement ... -
Estructuras distensivas y procesos metamórficos asociados en la Zona de Cizalla de Berzosa
(Sociedad Geológica de España, 1988)Evidence of a late-metamorphic extensional shear activity has been found along the central part of the Berzosa Shear Zone, as evidenced by «S-C» structures. This event could be correlated with a period of regional extension, ... -
Estudio combinado del maclado de la calcita y de la fracturación para la determinación de paleo-tensores de deformación y esfuerzo
(Sociedad Geológica de España, 1996)The twinned-calcite strain-gauge technique allows determination of main axis strain magnitudes and orientations in limestones rocks midly deformed (Groshong, 1972), during Alpine orogeny in the Iberian Chain. This estudy ... -
Exhumación alpina del bloque morfotectónico Pedriza - La Cabrera (Sierra del Guadarrama, Sistema Central Español): potencialidad de la termocronometría por trazas de fisión en apatitos
(Sociedad Geológica de España, 1995)The principles of Apatite Fission Track Analysis (AFTA), which allows to decipher the time-temperature paths of apatites since their last cooling below about 110°C are given and one example, from a Pedriza - La Cabrera ... -
Geocronología por el método Rb-Sr de las episienitas de la Sierra del Guadarrama, S.C.E., España
(Sociedad Geológica de España, 1992)Rb-Sr dating by internal isochrones of the episyenitea (hydrothermally dequartzified and alkalimetasomaticed granites) from the Sierra de Guadarrama gives an age of 274+-6 M.y., i.e.. Early Permian. The epysienites were ... -
Geometría fractal de los sistemas filonianos en la Península Hurd, Isla Livingston, Antártida Occidental
(Sociedad Geológica de España, 1999)One-dimensional analysis of vein systems has been carried out in eleven traverses along the coastal area on Hurd Peninsula, Livingston Island (Western Antarctica) to characterise vein geometry using fractal analysis ... -
La fracturación en el Cabo Shirreff, Isía Livingston, Antártida Occidental
(Sociedad Geológica de España, 1999)The Cape Shirreff, located in the northern part of Livingston Island, South Shetland Islands, represents one of the points of this island arc adjacent to the related trench. Here outcrop a volcanic succession with, probably, ... -
Medida de la deformación de pliegues en el extremo oriental del Sistema Central español
(Sociedad Geológica de España, 1987)We propose an areal distribution for the second phase hercynian folds in the eastermost part of the Spanish Central System, based on their morphological charactheristics. The analysis of these data allows us to calculate ... -
Medidas de deformación finita en la Cuenca de Cameros a partir de maclas de calcita en grietas de tensión
(Sociedad Geológica de España, 1997)In the central part of the Cameros basin (NW Iberian Chain) has been analysed the orientation of calcite c-axes and e-twin from the sparitic grains that filled extension veins in this region. The c-axls orientations allow ... -
El metamorfismo en la Cuenca de los Cameros. Geocronología e implicaciones tectónicas
(Sociedad Geológica de España, 1991)A case of hydrothermal metamorphism is described from the Cameros Basin along the rio Cidacos transect. The highest grade is reached at the base of the Urbión Group, a fluvial sequence Upper Jurassic to Lower Cretaceous ... -
Modelos gravimétricos para la corteza superior en el borde SE del Sistema Central Español
Babín, Rosa; Bergamín, J. F.; Fernández Rodríguez, Carlos
; González Casado, J. M.; Hernández Enrile, J. L.; Rivas, A.; Tejero López, Rosa; Vicente, Gerardo de (Sociedad Geológica de España, 1991)
A gravity research was carried out in the SE of the Spanish Centra/ System. The upper crust has been modelled in 2 1/2 D along three profiles. The gravity models suggest that the faults affecting both the Mesozoic-Cenozoic ...
