Constraints on the numerical age of the Paleocene-Eocene boundary

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doi: 10.1029/2010GC003426
Author(s): Charles, Adam J.; Condon, Daniel J.; Harding, Ian C.; Palike, Heiko; Marshall, John E. A.; Cui, Ying; Kump, Lee; Croudace, Ian W.
Author Affiliation(s): Primary:
University of Southampton, National Oceanography Centre, Southampton, United Kingdom
Other:
British Geological Survey, United Kingdom
Pennsylvania State University, United States
Volume Title: Geochemistry, Geophysics, Geosystems - G<sup>3</sup>
Source: Geochemistry, Geophysics, Geosystems - G>3`, Vol.12. Publisher: American Geophysical Union and The Geochemical Society, United States. ISSN: 1525-2027
Note: In English. 85 refs.; illus., incl. sketch map
Summary: Here we present combined radioisotopic dating (U-Pb zircon) and cyclostratigraphic analysis of the carbon isotope excursion at the Paleocene-Eocene (P-E) boundary in Spitsbergen to determine the numerical age of the boundary. Incorporating the total uncertainty from both radioisotopic and cyclostratigraphic data sets gives an age ranging from 55.728 to 55.964 Ma, within error of a recently proposed astronomical age of ∼55.93 Ma. Combined with the assumption that the Paleocene Epoch spans twenty-five 405 kyr cycles, our new age for the boundary suggests an age of ∼66 Ma for the Cretaceous-Paleogene boundary. Furthermore, our P-E boundary age is consistent with the hypothesis that the onset of the Paleocene-Eocene thermal maximum at the boundary occurred on the falling limb of a 405 kyr cycle, suggesting the event was initiated by a different mechanism to that which triggered the other early Eocene hyperthermals.
Year of Publication: 2011
Research Program: ODP Ocean Drilling Program
Key Words: 03 Geochronology; 12 Stratigraphy, Historical Geology and Paleoecology; Absolute age; Arctic region; Atlantic Ocean; C-13/C-12; Carbon; Cenozoic; Cretaceous; Cyclostratigraphy; Dates; Eocene; Isotope ratios; Isotopes; Leg 113; Leg 208; Lower Paleogene; Maud Rise; Mesozoic; Microfossils; Miospores; ODP Site 1263; ODP Site 690; Ocean Drilling Program; Paleocene; Paleogene; Palynomorphs; Pollen; South Atlantic; Southern Ocean; Spitsbergen; Stable isotopes; Statistical analysis; Stratigraphic boundary; Svalbard; Tertiary; Time series analysis; U/Pb; Upper Cretaceous; Walvis Ridge; Weddell Sea
Coordinates: N760000 N810000 E0300000 E0100000
Record ID: 2013046493
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