Skip to Main content Skip to Navigation
Journal articles

A volcanic marker (92 ka) for dating deep east Antarctic ice cores

Abstract : Tephra layers recorded in East Antarctic ice enable reliable linking over long distances and, when correlated with well-dated eruptions in the source area, provide absolute ages for improving the accuracy of model-based ice chronology. We used chronostratigraphic information and grain-specific geochemical data (major elements by electron microprobe and trace elements by LA-ICP-MS) to suggest that a tephra layer from the EPICA-Dome C and Dome Fuji ice cores is the distal counterpart of the Mt. Berlin (Marie Byrd Land province, West Antarctica) pyroclastic unit 40Ar/39Ar dated to 92.5±2.0 and 92.2±0.9 ka. Such one-to-one correlation, which is proposed here for the first time for the East Antarctic deep climatic archives, provides independent age constraints for glaciological modelling of core timescales.
Document type :
Journal articles
Complete list of metadatas

https://hal-insu.archives-ouvertes.fr/insu-00375733
Contributor : Aurore Gayraud <>
Submitted on : Thursday, April 16, 2009 - 8:47:53 AM
Last modification on : Friday, September 25, 2020 - 9:16:02 AM

Identifiers

Collections

Citation

Biancamaria Narcisi, Jean Robert Petit, Massimo Tiepolo. A volcanic marker (92 ka) for dating deep east Antarctic ice cores. Quaternary Science Reviews, Elsevier, 2006, 25 (21-22), pp.2682 à 2687. ⟨10.1016/j.quascirev.2006.07.009⟩. ⟨insu-00375733⟩

Share

Metrics

Record views

180