The Palaeocene "top chron C27n" transient greenhouse episode; evidence from marine pelagic Atlantic and peri-Tethyan sections

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doi: 10.1111/j.1365-3121.2012.01086.x
Author(s): Dinares-Turell, Jaume; Pujalte, Victoriano; Stoykova, Kristalina; Baceta, Juan Ignacio; Ivanov, Marin
Author Affiliation(s): Primary:
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
University of the Basque Country, Spain
Bulgarian Academy of Science, Geological Institute, Bulgaria
University of Sofia, Bulgaria
Volume Title: Terra Nova
Source: Terra Nova, 24(6), p.477-486. Publisher: Wiley-Blackwell, Oxford, United Kingdom. ISSN: 0954-4879
Note: In English. Supplemental information/data is available in the online version of this article. 52 refs.; illus., incl. sketch map, strat. cols.
Summary: 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 ppm 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. Abstract Copyright (2012), Blackwell Publishing Ltd.
Year of Publication: 2012
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Bjala Bulgaria; C-13/C-12; Carbon; Carbon isotope excursions; Carbonate rocks; Cenozoic; Chemical composition; Chemostratigraphy; Chron C27n; Correlation; Cyclostratigraphy; Danian; Foraminifera; Greenhouse effect; Icehouse effect; Iceland Plume; Indian Ocean; Invertebrata; Isotope ratios; Isotopes; Large igneous provinces; Leg 122; Leg 198; Leg 208; Limestone; Lower Paleocene; Magnetic properties; Magnetic susceptibility; Microfossils; North Atlantic; North Atlantic Igneous Province; North Pacific; Northwest Pacific; O-18/O-16; ODP Site 1209; ODP Site 1262; ODP Site 1263; ODP Site 761; Ocean Drilling Program; Oxygen; Pacific Ocean; Paleo-oceanography; Paleocene; Paleocene-Eocene Thermal Maximum; Paleoclimatology; Paleogene; Paleogeography; Paleomagnetism; Protista; Sedimentary rocks; Shatsky Rise; South Atlantic; Spectra; Stable isotopes; Stratotypes; Tertiary; Tethys; Walvis Ridge; West Pacific; Whole rock; Wombat Plateau; Zumaia Spain
Coordinates: N425201 N425234 E0275355 E0275353
N431746 N431756 W0021456 W0021539
N323900 N324000 E1583100 E1583000
S271100 S271100 E0013500 E0013400
S283200 S283200 E0024700 E0024700
S164414 S164413 E1153206 E1153206
Record ID: 2013039687
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom