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http://hdl.handle.net/2122/8335
Authors: | Dinarès-Turell, J.* Pujalte, V.* Stoykova, K.* Baceta, J. I.* Ivanov, M.* |
Title: | The Palaeocene ‘‘top chron C27n’’ transient greenhouse episode: evidence from marine pelagic Atlantic and peri-Tethyan sections | Journal: | Terra Nova | Series/Report no.: | 6/24 (2012) | Publisher: | Wiley-Blackwell | Issue Date: | 2012 | DOI: | 10.1111/j.1365-3121.2012.01086.x | Keywords: | hyperthermal isotope excursion TC27N event Zumaia |
Subject Classification: | 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 |
Abstract: | 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. |
Appears in Collections: | Article published / in press |
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