Orbital forcing as principal driver for fine-grained deep-marine siliciclastic sedimentation, Middle-Eocene Ainsa Basin, Spanish Pyrenees

Cantalejo, Blanca; Pickering, Kevin T.

doi:10.1016/j.palaeo.2015.01.008

Cited by 21 publications

(19 citation statements)

References 84 publications

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“…For example, FO B. inflatus a key marker at 47.84 Ma identified in sample AR4 within the Gerbe system produces a large time offset (~4 Myr) if we associate the R1/N1 reversal also found in the Gerbe system to the C20r/C20n reversal (43.432 Ma). In addition, the short time duration of the C19 chrons would then result in unrealistically high SARs during the deposition of the Aínsa, Morillo and Guaso systems which is inconsistent with previous publications (Cantalejo and Pickering, 2015). Similar problems are found when shifting the identified reversals to an older part of the stratigraphy, which is inconsistent within our biostratigraphy framework and with previous published work (i.e., Bentham and Burbank, 1996;Dreyer et al 1999;Mochales et al 2012a;Muñoz et al 2013).…”

Section: Proposed Age Modelcontrasting

confidence: 97%

“…This ~3-m thick dark mudstone unit is likely to be the ~30-kyr Late Lutetian Thermal Maximum (LLTM) that is recognised as a global transient warming event, dated from Atlantic deep-sea cores at 41.52 Ma by Westerhold et al (2018). Time-series analysis of the mudrocks in the Aínsa Basin indicate sediment accumulation rates of ~30 cm/kyr (Cantalejo and Pickering, 2015), consistent with the thickness of the dark mudstone/claystone as the LLTM.…”

Section: Discussionmentioning

confidence: 58%

“…Samples were collected at 10 m intervals over ~2 km of stratigraphy in order to achieve sufficient resolution to capture every polarity reversal. The average sediment accumulation rates (SARs) for the interfan fine-grained sediments in the Upper Hecho Group in the Aínsa Basin has been estimated to be between 24 and 50 cm/kyr with an average of 30cm/kyr (Cantalejo and Pickering, 2015). The sampling interval must span an interval of time >10 kyr to average out secular variation.…”

Section: Magnetostratigraphymentioning

confidence: 99%

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A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

Cantalejo

Pickering

McNiocaill

et al. 2020

JGS

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Using new palaeomagnetic and biostratigraphic data, we revise the age-model for the middle Eocene, deep-marine Aínsa Basin (Spanish Pyrenees), a tectonically active basin formed at a convergent-plate margin. This new age model provides a framework for evaluating the depositional history and sediment accumulation rates. New integrated magneto- and biostratigraphy data identify two normal and two reverse chrons of the geomagnetic polarity timescale (C21r, C21n, C20r, C20n) and place these Upper Hecho Group deposits in the middle Eocene (Lutetian). Nannofossil analysis identifies a biostratigraphic range from Subzone NP14b in the Gerbe System to Subzone NP15b at the top of the Aínsa System using key, age-diagnostic marker species such as Blackites inflatus, Blackites piriformis and Coccolithus gigas. We also present new nannofossil biostratigraphy from the Lower Hecho Group. This new Aínsa Basin chronostratigraphy enables inter-basinal correlations between the proximal fluvio-deltaic Tremp-Graus Basin and the more distal Jaca Basin, thereby providing a better understanding of the basin evolution.Supplementary materials: Field photographs of the sampled sections, magnetostratigraphic results, biostratigraphy results, alternative age model scenario and discussion on previous age model are available at https://doi.org/10.6084/m9.figshare.c.5083076

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Section: Proposed Age Modelcontrasting

confidence: 97%

Section: Discussionmentioning

confidence: 58%

Section: Magnetostratigraphymentioning

confidence: 99%

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A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

Cantalejo

Pickering

McNiocaill

et al. 2020

JGS

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“…The structural control of the shelf slope break restricted the size of the shallow marine and coastal zones, affecting the ability of shelf systems to modulate sediment supply to the deep marine [in the sense of Romans et al , ]. The highly variable climatic [ Zachos et al , ] and eustatic [ Kominz et al , ] regimes in the Eocene contemporaneous with the initiation of Pyrenean exhumation [ Muñoz , ; Puigdefàbregas et al , ] make the Ainsa Basin an ideal setting to investigate source to sink sedimentary dynamics, including sediment budgeting [ Michael et al , ], grain size fractionation [ Parsons et al , ; Allen et al , ], and climatic cyclicity [ Cantalejo and Pickering , ] in response to allogenic forcing.…”

Section: Introductionmentioning

confidence: 99%

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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“…San Lino level) supports this hypothesis. In addition, a decrease in the oxygenation of the basin was suggested by the Th/U values of Cantalejo and Pickering (2015) for Morillo and Guaso SGF systems. Finally, our Hi values show negative values during the Guaso SGF suggesting a higher input of terrestrial organic matter.…”

Section: Stable Carbon Isotopesmentioning

confidence: 97%

Magnetostratigraphy and stable isotope stratigraphy of the middle-Eocene succession of the Ainsa basin (Spain): new age constraints and implications for sediment delivery to the deep waters

Läuchli¹,

Garcés²,

Beamud³

et al. 2021

Preprint

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Orbital forcing as principal driver for fine-grained deep-marine siliciclastic sedimentation, Middle-Eocene Ainsa Basin, Spanish Pyrenees

Cited by 21 publications

References 84 publications

A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

A revised age-model for the Eocene deep-marine siliciclastic systems, Aínsa Basin, Spanish Pyrenees

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

Magnetostratigraphy and stable isotope stratigraphy of the middle-Eocene succession of the Ainsa basin (Spain): new age constraints and implications for sediment delivery to the deep waters

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