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Re-evaluation of MIS 3 glaciation using cosmogenic radionuclide and single grain luminescence ages, Kanas Valley, Chinese Altai
Stockholm University, Faculty of Science, Department of Physical Geography. Leibniz Institute for Applied Geophysics, Germany.
Stockholm University, Faculty of Science, Department of Physical Geography.
Stockholm University, Faculty of Science, Department of Physical Geography. Purdue University, USA.
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Number of Authors: 112018 (English)In: Journal of Quaternary Science, ISSN 0267-8179, E-ISSN 1099-1417, Vol. 33, no 1, p. 55-67Article in journal (Refereed) Published
Abstract [en]

Previous investigations observed a period of major glacial advances in Central Asia during marine oxygen isotope stage (MIS) 3 (57-29 ka), out of phase with global ice volume records. We have re-examined the Kanas moraine complex in the Altai Mountains of Central Asia, where an MIS 3 glaciation had been previously inferred. New and consistent cosmogenic exposure and single-grain luminescence ages indicate that the Kanas complex was formed during MIS 2 (29-12 ka), which brings its timing in line with the global ice volume record. We also identified a lateral moraine from a more extensive ice extent that dates to late MIS 5/MIS 4. To place our results in a wider contextual framework, we review the chronologies of another 26 proposed major MIS 3 glacial advances in Central Asia. For most of these sites, we find that the chronological data do not provide an unequivocal case for MIS 3 glaciation.

Place, publisher, year, edition, pages
2018. Vol. 33, no 1, p. 55-67
Keywords [en]
Central Asia, cosmogenic exposure dating, glaciation, MIS 3, OSL dating
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-153669DOI: 10.1002/jqs.2998ISI: 000423222600002OAI: oai:DiVA.org:su-153669DiVA, id: diva2:1188097
Available from: 2018-03-06 Created: 2018-03-06 Last updated: 2018-03-06Bibliographically approved

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Gribenski, NatachaJansson, Krister N.Harbor, Jonathan M.Stroeven, Arjen P.Blomdin, Robin
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