Filling the North European Early/Middle Eocene (Ypresian/Lutetian) boundary gap: Insights from the Pyrenean continental to deep-marine record

Payros, Aitor; Tosquella, Josep; Bernaola, Gilen; Dinarès-Turell, Jaume; Orue‐Etxebarria, Xabier; Pujalte, Victoriano

doi:10.1016/j.palaeo.2009.06.018

Cited by 54 publications

(75 citation statements)

References 43 publications

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“…(2006) showed that the turbidite-poor Marly and Sandy Flysch units are typified by tropical planktic foraminiferal assemblages, whereas the turbidite-rich Azkorri Sandstone is characterized by cosmopolitan, cool-water associations. This correlation suggests that, despite the increasing tectonic activity, climatic variations were the most plausible driving mechanism for the sedimentary evolution (Payros et al, 2006(Payros et al, , 2009aPayros and Martínez-Braceras, 2014).…”

Section: Methodsmentioning

confidence: 89%

“…5) is consistent with that calculated for the lower reaches of deep-sea submarine fans (Einsele, 2003). Payros et al (2009a) further correlated the interval 3 lowstand conditions with a glacioeustatic sea-level fall of ~20 m caused by a global cooling episode related to the onset of Antarctic glaciations (Pekar et al, 2005). Several authors have suggested that the cooling was driven by increased consumption of atmospheric CO 2 , probably resulting from silicate weathering, and caused a subsequent drop in global sea level (Pearson and Palmer, 2000;Zachos et al, 2001;Pagani et al, 2005;Cramer et al, 2009).…”

Section: Post-early Eocene Climatic Optimum Restorationmentioning

confidence: 87%

“…The age dating of the succession was based on previously published planktic foraminifera and calcareous nannofossil studies (Orue-Etxebarria et al, 1984;Bernaola et al, 2006aBernaola et al, , 2006bPayros et al, 2007Payros et al, , 2009aPayros et al, , 2009bPayros et al, , 2011.…”

Section: Methodsmentioning

confidence: 99%

“…Based on sedimentological and foraminiferal data, Payros et al (2006Payros et al ( , 2009a argued that such changes were linked to sea-level lowstand conditions, which triggered frequent submarine resedimentation events at the regional scale. Accordingly, the average sedimentation rate deduced for interval 3 (Fig.…”

Section: Post-early Eocene Climatic Optimum Restorationmentioning

confidence: 99%

“…6). Payros et al (2006Payros et al ( , 2009a suggested that a warmer climate resumed during the Ypresian-Lutetian transition (interval 4), and the large-scale resedimentation processes halted. Consequently, deep-sea environmental conditions became similar to those found during the pre-early Eocene climatic optimum interval 1 (for further details, see Rodríguez-Tovar et al, 2010;Ortiz et al, 2011;Payros et al, 2012;Payros and Martínez-Braceras, 2014).…”

Section: Post-early Eocene Climatic Optimum Restorationmentioning

confidence: 99%

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Early Eocene climatic optimum: Environmental impact on the North Iberian continental margin

Payros

Ortíz

Millan³

et al. 2015

Geological Society of America Bulletin

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The early Eocene climatic optimum, which constituted the peak of the long-term early Cenozoic global warming, had a significant impact on the environmental evolution of terrestrial and oceanic areas. Surprisingly, however, its influence on continental margins is poorly known. New insights are provided from a sedimentological, stable isotope, mineralogical, and micropaleontological study of an 1100-m-thick Lower-Middle Eocene deep-marine succession that accumulated on the North Iberian continental margin. The early Eocene climatic optimum is represented by a 410-m-thick interval characterized by scarcity of hemipelagic limestones, abundance of dark marls, which record a reduction in calcium carbonate content and an increase in kaolinite, and the occurrence of conspicuous red layers with high siderite and pyrite content.Series of stratigraphically significant events frame the early Eocene climatic optimum. Based on this analysis, the environmental influence of the early Eocene climatic optimum started at 52.6 Ma and lasted ~2.3 m.y. Its onset is marked by rapid drops in δ 13 C and δ 18 O, which record the addition of 13 C-depleted carbon into the ocean-atmosphere system for 80 k.y. and a concomitant warming. A hotter climate and a perennial rainfall regime increased the supply of terrestrial clays, organic matter, and iron oxides into the sea. Eventually, these changes affected the deepsea bottom 270 k.y. after the onset of the early Eocene climatic optimum, creating conditions in which opportunistic benthic foraminifera thrived, and leading to increased methanogenesis in the subsurface, which caused the formation of siderite. A subsequent gradual recovery culminated abruptly at 50.3 Ma with a global cooling episode, which is locally recorded by the accumulation of lowstand resedimentation deposits.

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Section: Methodsmentioning

confidence: 89%

Section: Post-early Eocene Climatic Optimum Restorationmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Post-early Eocene Climatic Optimum Restorationmentioning

confidence: 99%

Section: Post-early Eocene Climatic Optimum Restorationmentioning

confidence: 99%

See 3 more Smart Citations

Early Eocene climatic optimum: Environmental impact on the North Iberian continental margin

Payros

Ortíz

Millan³

et al. 2015

Geological Society of America Bulletin

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Detrital zircon (U‐Th)/(He‐Pb) double‐dating constraints on provenance and foreland basin evolution of the Ainsa Basin, south‐central Pyrenees, Spain

Thomson

Stöckli

Clark³

et al. 2017

Tectonics

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South central Pyrenean foreland basin fill preserves the eroded remnants of the early stages of fold‐thrust belt evolution and topographic growth. Specifically, the Eocene Hecho Group in the Ainsa Basin contains a succession of turbiditic channels and levees deposited in the transition zone between the fluvial‐deltaic and deep marine depozones. Detailed isotopic provenance analyses allow for the reconstruction of sediment sources of the ancient sediment routing systems. This study presents 2332 new detrital zircon (DZ) U‐Pb ages and 246 new DZ double‐dated (U‐Th)/(He‐Pb) ages from 19 turbiditic and fluvio‐deltatic sandstones in the Ainsa Basin. These data indicate a progressive provenance shift from Cadomian/Caledonian plutonic and metamorphic rocks of the eastern Pyrenees to Variscan plutonic rocks in the central Pyrenees. Minor sediment contributions from sources located to the S and SE of the basin are seen throughout the section. New DZ (U‐Th)/He results identify four main cooling events: Pyrenean orogenesis (~56 Ma), initial basin inversion (~80 Ma), Cretaceous rifting (~100 Ma), and pre‐Mesozoic cooling ages related to earlier tectonic phases. This study imposes new constraints on the paleogeographic evolution of the Pyrenees and illustrates that high‐frequency fluctuations in sediment delivery processes and sediment routing introduce superimposed noise upon the basin‐scale long‐term provenance evolution during orogenesis.

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Alpine Foreland Basins

Barnolas

Larrasoaña

Pujalte

et al. 2019

The Geology of Iberia: A Geodynamic Approach

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Filling the North European Early/Middle Eocene (Ypresian/Lutetian) boundary gap: Insights from the Pyrenean continental to deep-marine record

Cited by 54 publications

References 43 publications

Early Eocene climatic optimum: Environmental impact on the North Iberian continental margin

Early Eocene climatic optimum: Environmental impact on the North Iberian continental margin

Detrital zircon (U‐Th)/(He‐Pb) double‐dating constraints on provenance and foreland basin evolution of the Ainsa Basin, south‐central Pyrenees, Spain

Alpine Foreland Basins

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