Late Pleistocene glaciations on the sub-Antarctic Kerguelen Archipelago: new evidence from 36Cl CRE dating and comparison with other southern mid-latitude glacier records
Résumé
Previous paleo-glacial studies on Kerguelen showed a singular pattern of Holocene glacier evolution on this archipelago in comparison with other southern mid-latitude glacier records. In this study, we aim to test this singularity on a longer timescale, based on 26 new in situproduced 36 Cl ages from pre-Holocene glacio-geomorphic features. Samples from moraine boulders and glacially polished bedrock were extracted at six different sites, located near the Port-aux-Français scientific station (PAF site), on Longue Island, Australia Island, on the Port-Jeanne d'Arc Peninsula (PJDA site), on the Gallieni Peninsula at Baie Larose (BLR site) and the McMurdo Island. The moraine ages indicate that glacier culminations occurred during Marine Isotopic Stage 3 (MIS 3) at 42.2 ± 4.9 ka on the PAF site, and during the global Last Glacial Maximum (gLGM) at 21.5 ± 3.2 ka on the PJDA site and at 21.4 ± 3.7 ka and 19.4 ±
Mots clés
Glacier fluctuations Paleoclimate 36 Cl CRE dating Late Pleistocene Marine Isotopic Stage 3 Marine Isotopic Stage 2 Last Glacial Maximum Southern mid-latitudes Sub-Antarctic Kerguelen Islands
Glacier fluctuations Paleoclimate 36 Cl CRE dating Late Pleistocene Marine Isotopic Stage 3 Marine Isotopic Stage 2 Last Glacial Maximum Southern mid-latitudes Sub-Antarctic Kerguelen Islands
Domaines
Sciences de la Terre| Origine | Fichiers produits par l'(les) auteur(s) |
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