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dc.contributor.authorSerrano, Francisco-
dc.contributor.authorSanz de Galdeano, Carlos-
dc.contributor.authorEl Kadiri, Khalil-
dc.contributor.authorGuerra-Merchán, Antonio-
dc.contributor.authorLópez-Garrido, A. C.-
dc.contributor.authorMartín-Martín, Manuel-
dc.contributor.authorHlila, Rachid-
dc.date.accessioned2009-11-16T12:18:20Z-
dc.date.available2009-11-16T12:18:20Z-
dc.date.issued2006-11-
dc.identifier.citationEclogae Geologicae Helvetiae 99(2): 237-253 (2006)en_US
dc.identifier.issn0012-9402-
dc.identifier.urihttp://hdl.handle.net/10261/18687-
dc.description18 pages, 6 fiures, 1 table.en_US
dc.description.abstractThe Oligocene–early Miocene sedimentation in the Betic-Rif Internal Zone (BRIZ) occurred during the same time interval as the main tectonic events that are classically considered responsible for the structuring of this zone. Therefore, its paleogeographic and tectonic significance has been the subject of much controversy. The sedimentation developed in two successive groups of formations: the Ciudad Granada group of late Oligocene–Aquitanian in age and the Viñuela group of Burdigalian p.p. in age. The former consists of reddish marls containing clastic intercalations of Malaguide origin, while the Viñuela group is made up of siliceous-intercalated marlstones and lime-poor pelites, with a basal coarse-grained clastic material inherited from both the Malaguide and Alpujarride complexes. An overview of all the outcrops of the BRIZ leads to the conclusion that the two groups are closely related both geographically and tectonically. The paleogeographic, tectonic, stratigraphic and sedimentary relationships suggest that there was no nappe stacking stage between the two groups in the BRIZ. The transition from Ciudad Granada to Viñuela seems to have been the result of a transtensive tectonic event probably related to the westward migration of the BRIZ and to the opening of the Algero-Provençal and Alboran basins. This tectonic disturbance would have caused a severe subsidence in the downfaulted blocks, thus deepening the deposition zones; at the same time, the rapid uplifting of upfaulted blocks would have uncovered Alpujarride units, thus comprising the basement and the source of detritics for the Viñuela group.en_US
dc.description.abstractLes séries tertiaires assurant la couverture transgressive de la zone interne bético-rifaine (BRIZ) sont inclues dans le même intervalle d’âge, Oligocène-Miocène inférieur, que les événements tectoniques responsables, pour certains auteurs, de la structuration majeure de la dite zone. C’est pourquoi, l’interprétation tectono-sédimentaire de ces séries suscitait de vives controverses. Stratigraphiquement, deux groupes sédimentaires sont distingués: le groupe Ciudad Granada d’âge Oligocène supérieur–Aquitanien et le groupe Viñuela d’âge Burdigalien p.p. Le plus ancien contient de pélites rougeâtres et des coulées détritiques d’origine “Malaguide”, alors que le groupe Viñuela se compose de marnes, localement siliceuses, et de décharges conglomératiques à éléments hérités à partir des complexes Malaguide et Alpujarride. La révision générale des affleurements dans toute la BRIZ permet de conclure que les deux groupes appartenaient initialement aux mêmes dépocentres, sans que le puisse constater de phase de structuration en nappes pendant la période qui séparait leur dépôt. Le passage de Ciudad Granada à Viñuela semble dû à un événement tectonique transtensif, lié probablement à la dérive vers l’ouest de la BRIZ et à l’ouverture conséquente des bassins Algéro-Provençal et d’Alboran. Cette perturbation tectonique aurait généré un système de horsts et de grabens très contrastés. Des zones à forte subsidence étaient alors juxtaposées à des horsts exposant les unités Alpujarrides. Ces dernières peuvent servir à la fois de substratum et de source de matériel clastique pour le groupe Viñuela.en_US
dc.description.sponsorshipThis study was carried out as part of the research by Groups RNM-146 RNM- 163 and RNM-217 of Junta de Andalucia, within project A49/02 of the International Cooperation of Junta de Andalucia with Morocco, and within projects REN2002-01059 of the Spanish Ministry of Science and Technology and the PARS SDU 72 of the Moroccan CNCPRST. The authors are grateful to Dr. Stefan Bucher, Dr. Frizon de Lamotte and an anonymous reviewer whossuggestions have substantially improved this paper.en_US
dc.format.extent10752 bytes-
dc.format.mimetypeapplication/octet-stream-
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsclosedAccessen_US
dc.subjectOligoceneen_US
dc.subjectEarly Mioceneen_US
dc.subjectCiudad Granada groupen_US
dc.subjectViñuela groupen_US
dc.subjectNappe emplacementen_US
dc.subjectExtensional eventsen_US
dc.subjectInternal Betic Cordilleraen_US
dc.subjectInternal Rifen_US
dc.titleOligocene-early Miocene transgressive cover of the Betic-Rif Internal Zone. Revision of its geological significance.en_US
dc.typeartículoen_US
dc.identifier.doihttp://dx.doi.org/10.1007/s00015-006-1186-9-
dc.description.peerreviewedPeer revieweden_US
dc.relation.publisherversionhttp://dx.doi.org/10.1007/s00015-006-1186-9en_US
dc.identifier.e-issn1420-9128-
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