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Browsing by Author "Martín Crespo, Tomás"
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Aplicación conjunta de Georradar y Tomografía eléctrica para la evaluación del riesgo de colapso en la Sima de Madrona (Segovia)
Carbonate rocks are frequently affected by dissolution from rainfall and groundwater. As dissolution progress, the roof of the cavities can rapidly collapse originating landforms named sinkholes. When this kind of ... -
Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 1. Tomografía eléctrica
Gómez Ortiz, David; Martín Crespo, Tomás; Martín Velázquez, Silvia; Lillo, Francisco Javier; López, Iván; Carreño, Francisco (Sociedad Geológica de España, 2005)Volcanic deposits and structures are characterized by a high variability in both geometry and physical properties. These changes are common not only in a vertical direction but in the horizontal one too. As a result, the ... -
Caracterización de materiales volcánicos mediante técnicas geofísicas someras: 2. Georadar
Gómez Ortiz, David; Martín Crespo, Tomás; Martín Velázquez, Silvia; Márquez, Álvaro; Lillo, Francisco Javier; López, Iván; Carreño, Francisco (Sociedad Geológica de España, 2005)We have analyzed the ground penetrating radar (GPR) response in several volcanic materials (massive, pahoehoe and aa lava flows and airfall deposits) occurring in the Las Cañadas edifice (Tenerife, Canary Islands), in ... -
Caracterización geoambiental de balsas de lodos mineros mediante tomografía eléctrica
Gómez Ortiz, David; Martín Crespo, Tomás; Martín Velázquez, Silvia; Lillo, Francisco Javier; Ignacio, Cristina de (2007)The mining of copper from sulphide ores, besides the metal production, generates large amounts of mine tailings that are deposited, e.g. in impoundments. Furthermore, due to natural leaching from these impoundments, ... -
Caracterización geoquímica de la balsa de lodos de la mina de San Quintín, Ciudad Real
Martín Crespo, Tomás; Gómez Ortiz, David; Esbrí, José María; Monescillo, Cynthia Isabel; García Noguero, Eva María (2009)The geochemical characterization of the San Quintín mine pond is the aim of this study. This kind of waste deposits represents large accumulations of reactive minerals and subsequently, emission sources of heavy metals ... -
Circulación de fluidos en fracturas en el miembro superior de la Fm. Armàncies (Eoceno, Pirineo oriental)
Caja, Miguel Ángel; Permanyer, Albert; Marfil Pérez, Rafaela; Martín Crespo, Tomás (Sociedad Geológica de España, 2005)The presence of oil shows associated with fractures provides a significant opportunity to unravel the type, origin and evolution of fluids involved in fractures cementation and their relationship to oil migration. Two stages ... -
Descripción Macroscópica de la Fulgurita de Torre de Moncorvo (Portugal)
The rocks designated as fulgurites are the result of the action of atmospheric electrical discharges on soils or rocks. This work describes from the macroscopic point of view the Torre de Moncorvo fulgurite, as a first ... -
Fluidos asociados a filones de cuarzo en la Sierra de Guadarrama. Sistema Central Español
Martín Crespo, Tomás; López García, José Ángel; Vindel, E. (Sociedad Geológica de España, 1996)Fluids together with alteration were studied in representative hydrothermal barren quartz veins from central part o f Sierra de Guadarrama (Spain). Three types o f fluids have been distinguished: (i) an early fluid stage ...