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Timing and dynamics...
Timing and dynamics of glaciation in the Ikh Turgen Mountains, Altai region, High Asia
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- Blomdin, Robin (author)
- Stockholms universitet,Institutionen för naturgeografi
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- Stroeven, Arjen P. (author)
- Stockholms universitet,Institutionen för naturgeografi
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- Harbor, Jonathan M. (author)
- Stockholms universitet,Institutionen för naturgeografi,Purdue University, USA
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- Gribenski, N. (author)
- Stockholms universitet,Institutionen för naturgeografi,University of Bern, Switzerland
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Caffee, M. W. (author)
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- Heyman, Jakob (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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Rogozhina, I. (author)
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Ivanov, M. N. (author)
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Petrakov, D. A. (author)
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Walther, M. (author)
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Rudoy, A. N. (author)
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Zhang, W. (author)
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Orkhonselenge, A. (author)
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- Hättestrand, Clas (author)
- Stockholms universitet,Institutionen för naturgeografi
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Lifton, N. A. (author)
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- Jansson, Krister N. (author)
- Stockholms universitet,Institutionen för naturgeografi
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(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- English.
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In: Quaternary Geochronology. - : Elsevier BV. - 1871-1014 .- 1878-0350. ; 47, s. 54-71
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Abstract
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- Spanning the northern sector of High Asia, the Altai region contains a rich landform record of glaciation. We report the extent, chronologies, and dynamics of two paleoglaciers on opposite flanks of the Ikh Turgen mountains (In Russian: Chikhacheva Range), straddling the border between Russia and Mongolia, using a combination of remote sensing-based glacial geomorphological mapping, 10Be surface exposure dating, and geomorphometric analysis. On the eastern side (Mongolia), the Turgen-Asgat paleoglacier, with its potential for developing a large accumulation area (∼257 km2), expanded 40 km down valley, and mean ages from a latero-frontal moraine indicate deglaciation during marine oxygen isotope stage (MIS) 3 (45.1 ± 1.8 ka, n = 4) and MIS 2 (22.8 ± 3.3 ka, n = 5). These minimum age constraints are consistent with other 10Be glacial chronologies and paleoclimate records from the region, which indicates glacier culmination during cold and wet conditions coinciding with MIS 3 (piedmont-style glaciation; inferred for a few sites across the region) and glacier culmination during cold and dry conditions coinciding with MIS 2 (mainly valley-style glaciation; inferred from several sites across the region). On the western side (Russia), the Boguty paleoglacier had a smaller accumulation area (∼222 km2), and advanced 30 km down valley across a low gradient forefield. Surface exposure ages from two moraine complexes on this side of the mountains exhibit wide scatter (∼14–53 ka, n = 8), making paleoclimate inferences and comparison to other proxies difficult. Ice surface profile reconstructions imply that the two paleoglaciers likely shared an ice divide. © 2018 Elsevier B.V.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- 10Be surface exposure dating
- Altai
- Chikhacheva range
- Geomorphometric analysis
- Glacial geomorphology
- Ikh Turgen mountains
- Paleoglaciology
- Altai
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Blomdin, Robin
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Stroeven, Arjen ...
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Harbor, Jonathan ...
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Gribenski, N.
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Caffee, M. W.
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Heyman, Jakob
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show more...
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Rogozhina, I.
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Ivanov, M. N.
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Petrakov, D. A.
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Walther, M.
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Rudoy, A. N.
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Zhang, W.
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Orkhonselenge, A ...
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Hättestrand, Cla ...
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Lifton, N. A.
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Jansson, Krister ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Quaternary Geoch ...
- By the university
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University of Gothenburg
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Stockholm University