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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Online Access: | http://dx.doi.org/10.3389/feart.2021.727315 https://www.frontiersin.org/articles/10.3389/feart.2021.727315/full |
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crfrontiers:10.3389/feart.2021.727315 2024-02-11T10:04:41+01:00 Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia Shmelev, Denis Cherbunina, Maria Rogov, Victor Opfergelt, Sophie Monhonval, Arthur Strauss, Jens Russian Foundation for Basic Research European Research Council Bundesministerium für Bildung und Forschung Horizon 2020 Fonds De La Recherche Scientifique - FNRS 2021 http://dx.doi.org/10.3389/feart.2021.727315 https://www.frontiersin.org/articles/10.3389/feart.2021.727315/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 9 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2021 crfrontiers https://doi.org/10.3389/feart.2021.727315 2024-01-26T09:59:24Z 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 Ice permafrost Siberia Frontiers (Publisher) Yar ENVELOPE(151.300,151.300,70.917,70.917) Frontiers in Earth Science 9 |
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Open Polar |
collection |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Shmelev, Denis Cherbunina, Maria Rogov, Victor Opfergelt, Sophie Monhonval, Arthur Strauss, Jens Reconstructing Permafrost Sedimentological Characteristics and Post-depositional Processes of the Yedoma Stratotype Duvanny Yar, Siberia |
topic_facet |
General Earth and Planetary Sciences |
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. |
author2 |
Russian Foundation for Basic Research European Research Council Bundesministerium für Bildung und Forschung Horizon 2020 Fonds De La Recherche Scientifique - FNRS |
format |
Article in Journal/Newspaper |
author |
Shmelev, Denis Cherbunina, Maria Rogov, Victor Opfergelt, Sophie Monhonval, Arthur Strauss, Jens |
author_facet |
Shmelev, Denis Cherbunina, Maria Rogov, Victor Opfergelt, Sophie Monhonval, Arthur Strauss, Jens |
author_sort |
Shmelev, Denis |
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 SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/feart.2021.727315 https://www.frontiersin.org/articles/10.3389/feart.2021.727315/full |
long_lat |
ENVELOPE(151.300,151.300,70.917,70.917) |
geographic |
Yar |
geographic_facet |
Yar |
genre |
Ice permafrost Siberia |
genre_facet |
Ice permafrost Siberia |
op_source |
Frontiers in Earth Science volume 9 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2021.727315 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1790601402615070720 |