Identification of the Early Permian (Autunian) in the subsurface of the Ebro Basin, NE Spain, and its paleogeographic consequences
[EN] The Early Permian (Autunian) has not been identifi ed up to now in the subsurface of the Tertiary Ebro Basin because of the scarcity of oil well boreholes reaching the Variscan basement and the systematic attribution of a Carboniferous age, without any paleontological data, to the unmetamorfose...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2007 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/5488 |
| Acceso en línea: | http://hdl.handle.net/10261/5488 |
| Access Level: | acceso abierto |
| Palabra clave: | Permian Autunian Ebro Basin Palynology Carboniferous Pérmico Autuniense Cuenca del Ebro Palinología Carbonífero |
| Sumario: | [EN] The Early Permian (Autunian) has not been identifi ed up to now in the subsurface of the Tertiary Ebro Basin because of the scarcity of oil well boreholes reaching the Variscan basement and the systematic attribution of a Carboniferous age, without any paleontological data, to the unmetamorfosed siliciclastic sediments found at the base of some of them, clearly above the Early Paleozoic basement. Grey and black shale samples recovered from cores preserved in the REPSOL-YPF archives of the Caspe-1 oil well between meters 1.437 and 1.449 have yielded palynological assemblages dominated by Vittatina costabilis, Potonieisporites novicus, Potonieisporites sp., and other poorly preserved elements. This association has an Early Permian (Autunian) age and closely resembles other fi ndings in the Iberian Ranges, the Pyrenees and the southern margin of the Iberian Massif, shading new light on the early stages of the extensional events taking place in central and NE parts of the Iberian Microplate just after the main compressive phases of the Variscan orogeny. |
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