Toarcian Oceanic Anoxic Event in the Pindos Ocean
| Autor: | Hugh C. Jenkyns, Emanuela Mattioli, N. Kafousia, Vasileios Karakitsios |
|---|---|
| Přispěvatelé: | Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens (NKUA), Department of Earth Sciences [Oxford], University of Oxford [Oxford], Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), European Association of Organic Geochemists University of Athens SARG, University of Oxford, Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
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010504 meteorology & atmospheric sciences Toarcian Oceanic Anoxic Event [SDU.STU]Sciences of the Universe [physics]/Earth Sciences 010502 geochemistry & geophysics 01 natural sciences Paleontology chemistry.chemical_compound Passive margin Pelite Pindos Zone 14. Life underwater Mesozoic Kastelli Pelites 0105 earth and related environmental sciences Ammonite Extinction event Greece Geology language.human_language Geochemistry chemistry 13. Climate action carbon isotopes Facies language Carbonate |
| Zdroj: | Geological Magazine Geological Magazine, Cambridge University Press (CUP), 2011, 148 (4), pp.619-631. ⟨10.1017/S0016756811000082⟩ Geological Magazine, 2011, 148 (4), pp.619-631. ⟨10.1017/S0016756811000082⟩ |
| ISSN: | 0016-7568 1469-5081 |
| DOI: | 10.1017/S0016756811000082⟩ |
| Popis: | The Early Toarcian (Early Jurassic, c. 183 Ma) was characterized by an Oceanic Anoxic Event (T-OAE), primarily identified by the presence of globally distributed approximately coeval black organic-rich shales. This event corresponded with relatively high marine temperatures, mass extinction, and both positive and negative carbon-isotope excursions. Because most studies of the T-OAE have taken place in northern European and Tethyan palaeogeographic domains, there is considerable controversy as to the regional or global character of this event. Here, we present the first high-resolution integrated chemostratigraphic (carbonate, organic carbon, δ13Ccarb, δ13Corg) and biostratigraphic (calcareous nannofossil) records from the Kastelli Pelites cropping out in the Pindos Zone, western Greece. During the Mesozoic, the Pindos Zone was a deep-sea ocean-margin basin, which formed in mid-Triassic times along the northeast passive margin of Apulia. In two sections through the Kastelli Pelites, the chemostratigraphic and biostratigraphic (nannofossil) signatures of the most organic-rich facies are identified as correlative with the Lower Toarcian, tenuicostatum/polymorphum–falciferum/serpentinum/levisoni ammonite zones, indicating that these sediments record the T-OAE. Both sections also display the characteristic negative carbon-isotope excursion in organic matter and carbonate. This occurrence reinforces the global significance of the Early Toarcian Oceanic Anoxic Event. |
| Databáze: | OpenAIRE |
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