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The chronology of the Eocene tectonic and stratigraphic development of the eastern Pyrenean foreland basin, northeast Spain

1992; Geological Society of America; Volume: 104; Issue: 9 Linguagem: Inglês

10.1130/0016-7606(1992)104 2.3.co;2

1943-2674

Douglas W. Burbank, Cai Puigdefàbregas, JOSEP ANTON MUOZ,

Geological and Geochemical Analysis

Research Article| September 01, 1992 The chronology of the Eocene tectonic and stratigraphic development of the eastern Pyrenean foreland basin, northeast Spain DOUGLAS W. BURBANK; DOUGLAS W. BURBANK 1Department of Geological Sciences, University of Southern California, Los Angeles, California 90089-0740 Search for other works by this author on: GSW Google Scholar CAI PUIGDEFÀBREGAS; CAI PUIGDEFÀBREGAS 2Servei Geològic de Catalunya, Avenida Parallel 71, 08004 Barcelona, Spain Search for other works by this author on: GSW Google Scholar JOSEP ANTON MUÑOZ JOSEP ANTON MUÑOZ 3Department de Geologia Dinámica, Universitat de Barcelona, Zona Universitaria de Pedralbes, 08071 Barcelona, Spain Search for other works by this author on: GSW Google Scholar GSA Bulletin (1992) 104 (9): 1101–1120. https://doi.org/10.1130/0016-7606(1992)104 2.3.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation DOUGLAS W. BURBANK, CAI PUIGDEFÀBREGAS, JOSEP ANTON MUÑOZ; The chronology of the Eocene tectonic and stratigraphic development of the eastern Pyrenean foreland basin, northeast Spain. GSA Bulletin 1992;; 104 (9): 1101–1120. doi: https://doi.org/10.1130/0016-7606(1992)104 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Abundant and clearly exposed relationships between structures and syntectonic sedimentary rocks in the southern Pyrenees make this area particularly suitable for detailed studies of the sequential development of a collisional orogenic belt. During the Pyrenean orogeny, major shortening occurred in the eastern Pyrenees in Eocene and early Oligocene times. Until now, individual tectonic and depositional events have been only loosely defined temporally by biostratigraphic data. In order to provide a more precise chronological framework, four new magnetostratigraphic sections, spanning 8 km of Eocene strata and encompassing 18 m.y., have been developed in the eastern Pyrenees of northern Spain. The ages of nine major depositional sequences in the eastern Pyrenean foreland have been specified within the context of these chronologic data, beginning with the early Eocene transgression that commenced at 58 Ma. The timing of numerous tectonic events that occurred during the subsequent 16 m.y. can also be delineated, including the initial emplacement of the Pedraforca thrust sheet (58-54 Ma), the development of the Pedraforca breakback thrusts (47.5-40 Ma) at a mean shortening rate of 2.4 mm/yr, rotation of the Pedraforca footwall, three intervals of motion along the Vallfogona thrust (42.5-44.0, 40.5-41.5, and <40 Ma), creation of the Ripoll piggyback basin at 44 Ma, and the emplacement of the Ribes-Camprodon thrust sheet, beginning at ∼42 Ma. Extensive evaporitic deposition, apparently coincident with sea-level lowering, occurred twice during Eocene times in the eastern Pyrenees: the Beuda sequence at ∼49 Ma and the Cardona sequence at ∼40 Ma. In response to continued tectonic encroachment on the northern margin of the foreland, the Eocene depocenter migrated southward ∼80 km at a mean rate of 5 mm/yr, whereas individual facies migrated at rates as high as 1 cm/yr. In the context of recent models of foreland basins, most of the major grain-size changes appear to be modulated by changes in subsidence rates, except in areas very close to active thrusts. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.