Istituto di Geoscienze e Georisorse     
Narcisi B., Petit J., Tiepolo M. A volcanic marker (92 ka) for dating deep east Antarctic ice cores. In: Quaternary Science Reviews, vol. 25 (21-22) pp. 2682 - 2687. Elsevier, 2006.
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 92.52.0 and 92.20.9 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.
URL: http://https://www.journals.elsevier.com/quaternary-science-reviews/
Subject Antarctica
deep ice cores
volcanic markers

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