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://hdl.handle.net/2078.1/254334 https://doi.org/10.3389/feart.2021.727315 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:254334 2024-05-12T08:00:13+00:00 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 UCL - SST/ELI/ELIE - Environmental Sciences 2021 http://hdl.handle.net/2078.1/254334 https://doi.org/10.3389/feart.2021.727315 eng eng Frontiers Media SA boreal:254334 http://hdl.handle.net/2078.1/254334 doi:10.3389/feart.2021.727315 urn:EISSN:2296-6463 info:eu-repo/semantics/openAccess Frontiers in Earth Science, Vol. 9 (2021) cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene info:eu-repo/semantics/article 2021 ftunistlouisbrus https://doi.org/10.3389/feart.2021.727315 2024-04-18T17:15:15Z 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 DIAL@USL-B (Université Saint-Louis, Bruxelles) 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 |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene |
spellingShingle |
cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene 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 |
cryogenic weathering Kolyma lowland Arctic permafrost late Pleistocene Holocene |
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 |
UCL - SST/ELI/ELIE - Environmental Sciences |
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://hdl.handle.net/2078.1/254334 https://doi.org/10.3389/feart.2021.727315 |
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 |
boreal:254334 http://hdl.handle.net/2078.1/254334 doi:10.3389/feart.2021.727315 urn:EISSN:2296-6463 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/feart.2021.727315 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1798841973463842816 |