| Título: | Geological, geophysical and geochemical structureof a fault zone developed in granitic rocks: Implicationsfor fault zone modeling in 3-D |
| Autores: | Escuder Viruete, J. ; Carbonell Beltrán, Ramón ; Pérez-Soba Aguilar, Cecilia ; Martí Linares, David ; Pérez Estaún, A. |
| Tipo de documento: | texto impreso |
| Editorial: | Springer Science Business Media, 2004 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/openAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias: Geología: Petrología , Materia = Ciencias: Geología: Geoquímica , Tipo = Artículo |
| Resumen: |
The structure of a fault zone developed in granitic rocks can be established on the basis of the spatial variability of geological, geophysical and geochemical parameters. In the North Fault of the Mina Ratones area (SW Iberian Massif, Spain), fault rocks along two studied traverses (SR-2 and SR-3 boreholes) exhibit systematic changes in mineralogy, geochemistry, fabrics and microstructures that are related to brittle deformation and alteration of granite to form cataclasite and subsequent gouge. The spatial distribution and intensity of these changes suggest a North Fault morphology that is consistent with the fault-core/damage-zone model proposed by Chester et al. (1993) to describe a fault zone architecture. North Fault damage zone thickness can be defined by the development of mechanically related mesoscopic faults and joints, that produce a Fracture Index (FI)>10. High FI values are spatially correlated with relative low seismic velocity zones (VP VS high concentration of fractures and geochemical alteration produced by meteoric water-granite interaction along fault surfaces. This correlation is the base of a geostatistical model proposed in the final part of this study to image the fault zone architecture of a granitic massif. |
| En línea: | https://eprints.ucm.es/id/eprint/17195/1/jearthscience.pdf |
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