Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia
Cryogenic weathering is a key driver of periglacial sediment composition and properties. Selective mineral-grain weathering caused by freeze-thaw cycles in permafrost environments has the ability to dominate this process, leading to silt-rich grain-size distributions. The cryogenic weathering index...
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ftdoajarticles:oai:doaj.org/article:b064548e600f4513858084694b98d470 2023-05-15T15:10:15+02:00 Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia Denis Shmelev Maria Cherbunina Victor Rogov Sophie Opfergelt Arthur Monhonval Jens Strauss 2021-10-01T00:00:00Z https://doi.org/10.3389/feart.2021.727315 https://doaj.org/article/b064548e600f4513858084694b98d470 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2021.727315/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.727315 https://doaj.org/article/b064548e600f4513858084694b98d470 Frontiers in Earth Science, Vol 9 (2021) cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene Science Q article 2021 ftdoajarticles https://doi.org/10.3389/feart.2021.727315 2022-12-31T10:36:17Z Cryogenic weathering is a key driver of periglacial sediment composition and properties. Selective mineral-grain weathering caused by freeze-thaw cycles in permafrost environments has the ability to dominate this process, leading to silt-rich grain-size distributions. The cryogenic weathering index (CWI) is a promising tool to quantify cryogenic weathering and freezing conditions. It considers the low resistance of quartz to freeze-thaw cycles compared to feldspars. Using this approach, this study aims to decipher post-depositional weathering by reconstructing cryogenic late Pleistocene Yedoma origins of the Yedoma stratotype exposure Duvanny Yar. To estimate the recent environmental endmember and to determine the initial mineral composition of sediment until freezing, the distribution of CWI in the active layer was studied. In addition to CWI, we studied mineral composition, heavy mineral distribution, grain size distribution and grain morphology. We suggest that cryogenic weathering likely altered polygenetic deposits (fluvial, nival, colluvial, lacustrine, alluvial, and aeolian processes) during sediment and ground ice accumulation. Moreover, we found two CWI distribution peaks in the late Pleistocene - Holocene sediments at the boundaries between glacial and interglacial ages. In conclusion, we see that the Duvanny Yar sediment facies varied by CWI, but also with grain-size distribution, suggesting environmental changes during formation. Nevertheless, post-depositional processes like cryogenic weathering have influenced sediment characteristics and should be considered in paleoenvironmental reconstructions. Article in Journal/Newspaper Arctic Ice permafrost Siberia Directory of Open Access Journals: DOAJ Articles Arctic Kolyma ENVELOPE(161.000,161.000,69.500,69.500) Yar ENVELOPE(151.300,151.300,70.917,70.917) Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene Science Q |
spellingShingle |
cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene Science Q Denis Shmelev Maria Cherbunina Victor Rogov Sophie Opfergelt Arthur Monhonval Jens Strauss Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
topic_facet |
cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene Science Q |
description |
Cryogenic weathering is a key driver of periglacial sediment composition and properties. Selective mineral-grain weathering caused by freeze-thaw cycles in permafrost environments has the ability to dominate this process, leading to silt-rich grain-size distributions. The cryogenic weathering index (CWI) is a promising tool to quantify cryogenic weathering and freezing conditions. It considers the low resistance of quartz to freeze-thaw cycles compared to feldspars. Using this approach, this study aims to decipher post-depositional weathering by reconstructing cryogenic late Pleistocene Yedoma origins of the Yedoma stratotype exposure Duvanny Yar. To estimate the recent environmental endmember and to determine the initial mineral composition of sediment until freezing, the distribution of CWI in the active layer was studied. In addition to CWI, we studied mineral composition, heavy mineral distribution, grain size distribution and grain morphology. We suggest that cryogenic weathering likely altered polygenetic deposits (fluvial, nival, colluvial, lacustrine, alluvial, and aeolian processes) during sediment and ground ice accumulation. Moreover, we found two CWI distribution peaks in the late Pleistocene - Holocene sediments at the boundaries between glacial and interglacial ages. In conclusion, we see that the Duvanny Yar sediment facies varied by CWI, but also with grain-size distribution, suggesting environmental changes during formation. Nevertheless, post-depositional processes like cryogenic weathering have influenced sediment characteristics and should be considered in paleoenvironmental reconstructions. |
format |
Article in Journal/Newspaper |
author |
Denis Shmelev Maria Cherbunina Victor Rogov Sophie Opfergelt Arthur Monhonval Jens Strauss |
author_facet |
Denis Shmelev Maria Cherbunina Victor Rogov Sophie Opfergelt Arthur Monhonval Jens Strauss |
author_sort |
Denis Shmelev |
title |
Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
title_short |
Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
title_full |
Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
title_fullStr |
Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
title_full_unstemmed |
Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
title_sort |
reconstructing permafrost sedimentological characteristics and post-depositional processes of the yedoma stratotype duvanny yar, siberia |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.727315 https://doaj.org/article/b064548e600f4513858084694b98d470 |
long_lat |
ENVELOPE(161.000,161.000,69.500,69.500) ENVELOPE(151.300,151.300,70.917,70.917) |
geographic |
Arctic Kolyma Yar |
geographic_facet |
Arctic Kolyma Yar |
genre |
Arctic Ice permafrost Siberia |
genre_facet |
Arctic Ice permafrost Siberia |
op_source |
Frontiers in Earth Science, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2021.727315/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.727315 https://doaj.org/article/b064548e600f4513858084694b98d470 |
op_doi |
https://doi.org/10.3389/feart.2021.727315 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1766341296177283072 |