A late Quaternary loess – paleosol record at Kurtak, southern Siberia
A high-resolution paleoclimatic record for the last two glacial – interglacial cycles has been documented at Kurtak in southern Siberia. A unique, 34 m high late Quaternary loess section (section 29) with a series of 32 variably developed paleosol horizons provides evidence of a strongly fluctuating...
Published in: | Canadian Journal of Earth Sciences |
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Canadian Science Publishing
1997
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crcansciencepubl:10.1139/e17-054 2023-12-17T10:51:31+01:00 A late Quaternary loess – paleosol record at Kurtak, southern Siberia Chlachula, J. Rutter, N. W. Evans, M. E. 1997 http://dx.doi.org/10.1139/e17-054 http://www.nrcresearchpress.com/doi/pdf/10.1139/e17-054 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 34, issue 5, page 679-686 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1997 crcansciencepubl https://doi.org/10.1139/e17-054 2023-11-19T13:39:20Z A high-resolution paleoclimatic record for the last two glacial – interglacial cycles has been documented at Kurtak in southern Siberia. A unique, 34 m high late Quaternary loess section (section 29) with a series of 32 variably developed paleosol horizons provides evidence of a strongly fluctuating, but patterned, climatic change. Mineralogical composition and grain morphology of the undifferentiated (aeolian and colluviated) loess indicate a local provenance and a short transport of the silt, derived by glacial erosion of the granitic and metamorphic bedrock in the Kuznetskiy Alatau and eastern Sayan mountains, and subsequently subaerially redeposited from the alluvial plain in the Yenisey River valley. The succession of Chernozemic, Brunisolic, and Gleyed Regosolic soils, alternating with nonweathered or weakly weathered loess events, matched by parallel changes in magnetic susceptibility, can be correlated with marine isotope stages 1 – 7. The magnetic susceptibility pattern is completely opposite to that of the Chinese loess record, where magnetic susceptibility is highest in paleosols, as opposed to lowest in Kurtak paleosols. The reason for this is not completely understood. Nevertheless, the magnetic susceptibility profile correlates well with the last two glacial – interglacial cycles. Furthermore, isotope stage 5 includes several short-duration, relatively small amplitude susceptibility signals corresponding to equivalent signals in the δ 18 O record. These include the colder intervals (stadials?) 5b and 5d, warmer intervals (interstadials?) 5a and 5c, and the "optimum" warm interval 5e. Article in Journal/Newspaper yenisey river Siberia Canadian Science Publishing (via Crossref) Yenisey ENVELOPE(82.680,82.680,71.828,71.828) Canadian Journal of Earth Sciences 34 5 679 686 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Chlachula, J. Rutter, N. W. Evans, M. E. A late Quaternary loess – paleosol record at Kurtak, southern Siberia |
topic_facet |
General Earth and Planetary Sciences |
description |
A high-resolution paleoclimatic record for the last two glacial – interglacial cycles has been documented at Kurtak in southern Siberia. A unique, 34 m high late Quaternary loess section (section 29) with a series of 32 variably developed paleosol horizons provides evidence of a strongly fluctuating, but patterned, climatic change. Mineralogical composition and grain morphology of the undifferentiated (aeolian and colluviated) loess indicate a local provenance and a short transport of the silt, derived by glacial erosion of the granitic and metamorphic bedrock in the Kuznetskiy Alatau and eastern Sayan mountains, and subsequently subaerially redeposited from the alluvial plain in the Yenisey River valley. The succession of Chernozemic, Brunisolic, and Gleyed Regosolic soils, alternating with nonweathered or weakly weathered loess events, matched by parallel changes in magnetic susceptibility, can be correlated with marine isotope stages 1 – 7. The magnetic susceptibility pattern is completely opposite to that of the Chinese loess record, where magnetic susceptibility is highest in paleosols, as opposed to lowest in Kurtak paleosols. The reason for this is not completely understood. Nevertheless, the magnetic susceptibility profile correlates well with the last two glacial – interglacial cycles. Furthermore, isotope stage 5 includes several short-duration, relatively small amplitude susceptibility signals corresponding to equivalent signals in the δ 18 O record. These include the colder intervals (stadials?) 5b and 5d, warmer intervals (interstadials?) 5a and 5c, and the "optimum" warm interval 5e. |
format |
Article in Journal/Newspaper |
author |
Chlachula, J. Rutter, N. W. Evans, M. E. |
author_facet |
Chlachula, J. Rutter, N. W. Evans, M. E. |
author_sort |
Chlachula, J. |
title |
A late Quaternary loess – paleosol record at Kurtak, southern Siberia |
title_short |
A late Quaternary loess – paleosol record at Kurtak, southern Siberia |
title_full |
A late Quaternary loess – paleosol record at Kurtak, southern Siberia |
title_fullStr |
A late Quaternary loess – paleosol record at Kurtak, southern Siberia |
title_full_unstemmed |
A late Quaternary loess – paleosol record at Kurtak, southern Siberia |
title_sort |
late quaternary loess – paleosol record at kurtak, southern siberia |
publisher |
Canadian Science Publishing |
publishDate |
1997 |
url |
http://dx.doi.org/10.1139/e17-054 http://www.nrcresearchpress.com/doi/pdf/10.1139/e17-054 |
long_lat |
ENVELOPE(82.680,82.680,71.828,71.828) |
geographic |
Yenisey |
geographic_facet |
Yenisey |
genre |
yenisey river Siberia |
genre_facet |
yenisey river Siberia |
op_source |
Canadian Journal of Earth Sciences volume 34, issue 5, page 679-686 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e17-054 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
34 |
container_issue |
5 |
container_start_page |
679 |
op_container_end_page |
686 |
_version_ |
1785576808024899584 |