La tectónica alpina de la Falla de Alentejo-Plasencia (Macizo Hespérico)
Alentejo-Plasencia fault was active during the alpine compressional phases with a sinistral strike-slip movement in two main stages. The fault geometry was straight and no important bendings formed during Paleogene, when the maximum shortening direction was close to N-S or NNE-SSW. During Miocene (M...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/12648 |
| Acceso en línea: | http://hdl.handle.net/10272/12648 |
| Access Level: | acceso abierto |
| Palabra clave: | Strike-slip fault Pull-apart basin Restrainig bend Alpine Collision Alentejo-Plasencia Hesperian Massif |
| Sumario: | Alentejo-Plasencia fault was active during the alpine compressional phases with a sinistral strike-slip movement in two main stages. The fault geometry was straight and no important bendings formed during Paleogene, when the maximum shortening direction was close to N-S or NNE-SSW. During Miocene (Middle Aragonian) and related to the Neocastellana tectonic phase, the Alentejo-Plasencia fault still moved as a sinistraI strike-slip due to a NW-SE compression, but the Extremadura sector of the fault curved and bends formed along the fault at certain points where important lithologic changes were present. Several restraining and releasing bends formed; these latter creating pull-apart basins, some of them filled with continental clastic sediments. Most of the fault displacement (about 3 Km.) seems to be related to the alpine tectonics. The small displacement compared with the fault length is coherent with its location on a co//s/ona/ area foreland |
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