Transición dúctil-frágil en la corteza de la zona central de la Península Ibérica
Brittle-ductile transition is estimated on the basis of pore-pressure dependent frictional failure in the brittle regime, and power-law steady-state creep in the ductile regime. Structure and lithological composition of the Central Iberian Peninsula Crust combined with geotherm are used to generate...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1999 |
| 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:10272/9978 |
| Acceso en línea: | http://hdl.handle.net/10272/9978 |
| Access Level: | acceso abierto |
| Palabra clave: | Brittle-ductile transition Rheology Continental crust |
| Sumario: | Brittle-ductile transition is estimated on the basis of pore-pressure dependent frictional failure in the brittle regime, and power-law steady-state creep in the ductile regime. Structure and lithological composition of the Central Iberian Peninsula Crust combined with geotherm are used to generate rheological profiles. Two brittle-ductile transitions are shown in the crust. The shallower one is located at ~ 7 km under compressional stresses, and at » 9 km under tensional stresses. The deepest is located at the top of the middle crust, at -14 km in compression and =>17 km in tension regime. Below it, the material is ductile throughout, with a jump in strength at the Moho, which is a main rheological discontinuity. Upper part of lithospheric mantle behaviour is dominated by brittle mechanisms when the crust thickness is 30 km, but ductile mechanisms prevail in 34 km crust thickness |
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