Constraints on the numerical age of the Paleocene-Eocene boundary

Adam J. Charles, Daniel J. Condon, Ian C. Harding, Heiko Pälike, John E.A. Marshall, Ying Cui, Lee Kump, Ian W. Croudace

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

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.

Original languageEnglish
Article numberQ0AA17
JournalGeochemistry, Geophysics, Geosystems
Volume12
Issue number6
DOIs
StatePublished - 1 Mar 2012

Keywords

  • Eocene
  • PETM
  • Paleocene
  • Spitsbergen
  • cyclostratigraphy
  • radioisotopic dating

Fingerprint Dive into the research topics of 'Constraints on the numerical age of the Paleocene-Eocene boundary'. Together they form a unique fingerprint.

  • Cite this

    Charles, A. J., Condon, D. J., Harding, I. C., Pälike, H., Marshall, J. E. A., Cui, Y., Kump, L., & Croudace, I. W. (2012). Constraints on the numerical age of the Paleocene-Eocene boundary. Geochemistry, Geophysics, Geosystems, 12(6), [Q0AA17]. https://doi.org/10.1029/2010GC003426