Late Pleistocene glaciations on the sub-Antarctic Kerguelen Archipelago: new evidence from 36Cl CRE dating and comparison with other southern mid-latitude glacier records - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Quaternary Science Reviews Année : 2024

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 ±
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hal-04480811 , version 1 (29-02-2024)

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Joanna Charton, Irene Schimmelpfennig, Vincent Jomelli, Deborah Verfaillie, Guillaume Delpech, et al.. Late Pleistocene glaciations on the sub-Antarctic Kerguelen Archipelago: new evidence from 36Cl CRE dating and comparison with other southern mid-latitude glacier records. Quaternary Science Reviews, 2024, 328, pp.108533. ⟨10.1016/j.quascirev.2024.108533⟩. ⟨hal-04480811⟩

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