Late miocene ice sheet elevation in the Grove Mountains, East Antarctica, inferred from cosmogenic Ne-21-Be-10-Al-26

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dc.contributor.authorKong, Pen_AU
dc.contributor.authorHuang, FXen_AU
dc.contributor.authorLiu, XHen_AU
dc.contributor.authorFink, Den_AU
dc.contributor.authorDing, Len_AU
dc.contributor.authorLai, QZen_AU
dc.date.accessioned2010-08-05T00:09:35Zen_AU
dc.date.available2010-08-05T00:09:35Zen_AU
dc.date.issued2010-05en_AU
dc.date.statistics2010-05en_AU
dc.description.abstractThe Grove Mountains, lying in the interior of East Antarctica, consist of 64 nunataks. Geomorphic characteristics of the nunataks suggest that past ice sheet elevations have overtopped the summits of the Grove Mountains. Cosmogenic 21Ne, 10Be and 26Al dating yields surface exposure ages of five bedrock samples taken from the crest of Mount Harding, a typical nunatak in the Grove Mountains. Using multi-nuclide fitting, we have calculated the time that the ice sheet retreated below the crest of Mount Harding; all data point to the late Miocene, ~ 6.3 Ma ago. The results provide the first land-based evidence of the elevation of the East Antarctic Ice Sheet in the Grove Mountains in Late Miocene, which reached 2300 m, 200 m higher than the current ice sheet level. The higher than current ice sheet elevations during the late Miocene together with contemporaneously higher temperatures in the Southern Ocean suggest that moisture transport plays an important role in ice sheet expansion in the interior of East Antarctica. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationKong, P., Huang, F. X., Liu, X. H., Fink, D., Ding, L., & Lai, Q. Z. (2010). Late miocene ice sheet elevation in the Grove Mountains, East Antarctica, inferred from cosmogenic Ne-21-Be-10-Al-26. Global and Planetary Change, 72(1-2), 50-54. doi:10.1016/j.gloplacha.2010.03.005en_AU
dc.identifier.govdoc2202en_AU
dc.identifier.issn0921-8181en_AU
dc.identifier.issue1-2en_AU
dc.identifier.journaltitleGlobal and Planetary Changeen_AU
dc.identifier.pagination50-54en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.gloplacha.2010.03.005en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2042en_AU
dc.identifier.volume72en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectAntarcticaen_AU
dc.subjectMiocene epochen_AU
dc.subjectIceen_AU
dc.subjectAge estimationen_AU
dc.subjectMoistureen_AU
dc.subjectLevelsen_AU
dc.titleLate miocene ice sheet elevation in the Grove Mountains, East Antarctica, inferred from cosmogenic Ne-21-Be-10-Al-26en_AU
dc.typeJournal Articleen_AU
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