Turbidite‐induced re‐oxygenation episodes of the sediment‐water interface in a diverticulum of the Tethys Ocean during the Oceanic Anoxic Event 1a: The French Vocontian Basin
| العنوان: | Turbidite‐induced re‐oxygenation episodes of the sediment‐water interface in a diverticulum of the Tethys Ocean during the Oceanic Anoxic Event 1a: The French Vocontian Basin |
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| المؤلفون: | Bastien Huet, François Baudin, Jean-Yves Reynaud, Thierry Adatte, Nicolas Tribovillard, Alexis Caillaud, Viviane Bout-Roumazeilles, Anthony Chappaz, Jean Noël Ferry, Melesio Quijada, Armelle Riboulleau |
| المساهمون: | Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Université du Littoral Côte d'Opale-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Processus et bilan des domaines sédimentaires (PBDS), Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), CNRS, UMR8187, Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Institut de Géologie et d'Hydrogéologie, Université de Neuchâtel (UNINE), Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS), Central Michigan University (CMU), Université de Lausanne (UNIL), TOTAL S.A., TOTAL FINA ELF, Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Nord]), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université de Lausanne = University of Lausanne (UNIL), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Depositional Record Depositional Record, Wiley, 2020, ⟨10.1002/dep2.102⟩ Depositional Record, Wiley, 2020, 6 (2), pp.352-382. ⟨10.1002/dep2.102⟩ Depositional Record, 2020, 6 (2), pp.352-382. ⟨10.1002/dep2.102⟩ The Depositional Record, Vol 6, Iss 2, Pp 352-382 (2020) Depositional Record, Wiley, 2020, 6, pp.352-382. ⟨10.1002/dep2.102⟩ |
| بيانات النشر: | Wiley, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, [SDV]Life Sciences [q-bio], Stratigraphy, Early Aptian, Environmental Science (miscellaneous), Structural basin, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, Sediment–water interface, medicine, 14. Life underwater, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, ComputingMilieux_MISCELLANEOUS, geochemistry, organic matter, 0105 earth and related environmental sciences, grain size, [PHYS]Physics [physics], palaeoredox proxies, lcsh:QE1-996.5, Paleontology, Geology, organic matter dilution, Tethys Ocean, medicine.disease, Anoxic waters, Turbidite, lcsh:Geology, Clay minerals, [SDU]Sciences of the Universe [physics], 13. Climate action, [SDE]Environmental Sciences, Re oxygenation, Diverticulum, turbidites |
| الوصف: | International audience; Widespread anoxic events affected the Tethys Ocean during the Mesozoic. The Ocean Anoxic Event 1a (Early Aptian), expressed as the Selli Level or Goguel Level (GL) in European basins. The GL was deposited in the French Vocontian Basin, a semi-enclosed basin connected to the Tethys Ocean. This study presents an integrated approach (Rock Eval, clay minerals, grain-size, inorganic geochemistry and molecular biomarkers), applied to four sections in the basin distributed along a proximal-distal transect. This study shows that the GL was perturbed by turbidites. In particular, the results demonstrate: (a) a homogeneous redox status of the basin that experienced oxic to suboxic conditions, according to trace element distributions and (b) low organic matter contents (total organic carbon ca 1 wt%) in the three sections where turbiditic deposits are observed. The distal, condensed section exhibits the highest organic matter contents (total organic carbon >3 wt%). In addition, the presence of gammacerane and isorenieratene derivatives in the distal sections suggests that the water-column was intermittently stratified, with hypoxia developing in the photic zone. This stratification did not result from strong surface productivity but more likely from: (a) limited renewal of deep water in the basin; (b) reputedly high surface-water palaeotemperatures during the Early Aptian; and (c) the influx of waters, possibly depleted in free oxygen and in some dissolved trace elements, into the basin. The turbiditic inputs, in addition to organic matter dilution in the sediments and a brief rupture of the water-column stratification in the proximal areas of the basin, ventilated the sea floor and more specifically re-oxidized the sediment-water interface as well as underlying sediments. Such episodes of benthic re-ox-ygenation could have altered the long-term palaeoredox record, even in the distal sections where reducing conditions prevailed during deposition. In the area deprived of turbiditic input, sedimentary condensation, coupled with low oxygen conditions, furthered organic matter preservation and concentration. |
| تدمد: | 2055-4877 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8991b577d9239070bcc4b19668dbf90Test https://doi.org/10.1002/dep2.102Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....b8991b577d9239070bcc4b19668dbf90 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20554877 |
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