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Extensive glaciation in Transbaikalia, Siberia, at the Last Glacial Maximum

Journal Article


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Abstract


  • Successively smaller glacial extents have been proposed for continental Eurasia during the stadials of the last glacial period leading up to the Last Glacial Maximum (LGM). At the same time the large mountainous region east of Lake Baikal, Transbaikalia, has remained unexplored in terms of glacial chronology despite clear geomorphological evidence of substantial past glaciations. We have applied cosmogenic 10Be exposure dating and optically stimulated luminescence to establish the first quantitative glacial chronology for this region. Based on eighteen exposure ages from five moraine complexes, we propose that large mountain ice fields existed in the Kodar and Udokan mountains during Oxygen Isotope Stage 2, commensurate with the global LGM. These ice fields fed valley glaciers (>100 km in length) reaching down to the Chara Depression between the Kodar and Udokan mountains and to the valley of the Vitim River northwest of the Kodar Mountains. Two of the investigated moraines date to the Late Glacial, but indications of incomplete exposure among some of the sampled boulders obscure the specific details of the post-LGM glacial history. In addition to the LGM ice fields in the highest mountains of Transbaikalia, we report geomorphological evidence of a much more extensive, ice-cap type glaciation at a time that is yet to be firmly resolved.

Authors


  •   Margold, Martin (external author)
  •   Jansen, John D. (external author)
  •   Gurinov, Artem L. (external author)
  •   Codilean, Alexandru Tiberiu.
  •   Fink, David
  •   Preusser, Frank (external author)
  •   Reznichenko, Natalya V. (external author)
  •   Mifsud, Charles C. (external author)

Publication Date


  • 2016

Citation


  • Margold, M., Jansen, J. D., Gurinov, A. L., Codilean, A. T., Fink, D., Preusser, F., Reznichenko, N. V. & Mifsud, C. (2016). Extensive glaciation in Transbaikalia, Siberia, at the Last Glacial Maximum. Quaternary Science Reviews, 132 161-174.

Scopus Eid


  • 2-s2.0-84949661218

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4595&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/3572

Number Of Pages


  • 13

Start Page


  • 161

End Page


  • 174

Volume


  • 132

Abstract


  • Successively smaller glacial extents have been proposed for continental Eurasia during the stadials of the last glacial period leading up to the Last Glacial Maximum (LGM). At the same time the large mountainous region east of Lake Baikal, Transbaikalia, has remained unexplored in terms of glacial chronology despite clear geomorphological evidence of substantial past glaciations. We have applied cosmogenic 10Be exposure dating and optically stimulated luminescence to establish the first quantitative glacial chronology for this region. Based on eighteen exposure ages from five moraine complexes, we propose that large mountain ice fields existed in the Kodar and Udokan mountains during Oxygen Isotope Stage 2, commensurate with the global LGM. These ice fields fed valley glaciers (>100 km in length) reaching down to the Chara Depression between the Kodar and Udokan mountains and to the valley of the Vitim River northwest of the Kodar Mountains. Two of the investigated moraines date to the Late Glacial, but indications of incomplete exposure among some of the sampled boulders obscure the specific details of the post-LGM glacial history. In addition to the LGM ice fields in the highest mountains of Transbaikalia, we report geomorphological evidence of a much more extensive, ice-cap type glaciation at a time that is yet to be firmly resolved.

Authors


  •   Margold, Martin (external author)
  •   Jansen, John D. (external author)
  •   Gurinov, Artem L. (external author)
  •   Codilean, Alexandru Tiberiu.
  •   Fink, David
  •   Preusser, Frank (external author)
  •   Reznichenko, Natalya V. (external author)
  •   Mifsud, Charles C. (external author)

Publication Date


  • 2016

Citation


  • Margold, M., Jansen, J. D., Gurinov, A. L., Codilean, A. T., Fink, D., Preusser, F., Reznichenko, N. V. & Mifsud, C. (2016). Extensive glaciation in Transbaikalia, Siberia, at the Last Glacial Maximum. Quaternary Science Reviews, 132 161-174.

Scopus Eid


  • 2-s2.0-84949661218

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4595&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/3572

Number Of Pages


  • 13

Start Page


  • 161

End Page


  • 174

Volume


  • 132