The Palaeocene ‘‘top chron C27n’’ transient greenhouse episode: evidence from marine pelagic Atlantic and peri-Tethyan sections

• Published in: Terra Nova
• Main Authors: Dinarès-Turell, J., Pujalte, V., Stoykova, K., Baceta, J. I., Ivanov, M.
• Other Authors: Dinarès-Turell, J.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Pujalte, V.; Department of Stratigraphy and Paleontology, Fac. Science and Technology, University of the Basque Country UPV⁄EHU, PO Box 644, Bilbao E-48080, Spain, Stoykova, K.; Department of Paleontology and Stratigraphy, Geological Institute, Bulgarian Academy of Science, Sofia BG-1113, Bulgaria, Baceta, J. I.; Department of Stratigraphy and Paleontology, Fac. Science and Technology, University of the Basque Country UPV⁄EHU, PO Box 644, Bilbao E-48080, Spain, Ivanov, M.; Department of Geology and Paleontology, University of Sofia, Sofia BG-1000, Bulgaria, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia, Department of Stratigraphy and Paleontology, Fac. Science and Technology, University of the Basque Country UPV⁄EHU, PO Box 644, Bilbao E-48080, Spain, Department of Paleontology and Stratigraphy, Geological Institute, Bulgarian Academy of Science, Sofia BG-1113, Bulgaria, Department of Geology and Paleontology, University of Sofia, Sofia BG-1000, Bulgaria
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley-Blackwell 2012
• Subjects: hyperthermal; isotope excursion; TC27N event; Zumaia; 03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology; 04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating; processes; transport; 04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy; Greenland; Pacific; North Atlantic
• Online Access: http://hdl.handle.net/2122/8335; https://doi.org/10.1111/j.1365-3121.2012.01086.x

The early Cenozoic, which is punctuated by several negative carbon isotope excursions (CIEs), was a time of climatic and oceanographic transition from ’Greenhouse’ to ’Icehouse’ conditions. The occurrence of a 0.5& CIE starting at the top of Chron C27n (TC27N) is reconfirmed with stable isotope data from Zumaia (Spain) and Bjala (Bulgaria) localities. Spectral analysis on respective carbonate ⁄magnetic susceptibility proxy records substantiates the orbital cyclostratigraphy allowing correlation to a high-resolution benthic foraminifera isotope record from ODP Pacific Site 1209, that indicates a coeval 2 C transient warming. The hyperthermal event lasts 200 ka, contrasting with other short-lived events from the Eocene, and displays a relatively rapid onset and a longer tailing back to pre-event values similar to the Palaeocene–Eocene Thermal Maximum (PETM), though lower in amplitude. That a causal trigger for the TC27N event may be the onset of volcanism in the North Atlantic Igneous Province (NAIP) can be inferred from a 200-m-thick lava pile erupted during C27n ⁄ C26r polarity transition in the E Greenland margin. Published 477-486 2.2. Laboratorio di paleomagnetismo JCR Journal reserved