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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ftawi:oai:epic.awi.de:54677 2024-05-19T07:41:53+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 2021 application/pdf https://epic.awi.de/id/eprint/54677/ https://epic.awi.de/id/eprint/54677/2/feart-09-727315.pdf https://www.frontiersin.org/articles/10.3389/feart.2021.727315/abstract https://hdl.handle.net/10013/epic.f8febc34-12f6-44e0-a598-b5f194e3c51e unknown https://epic.awi.de/id/eprint/54677/2/feart-09-727315.pdf Shmelev, D. , Cherbunina, M. , Rogov, V. , Opfergelt, S. , Monhonval, A. and Strauss, J. orcid:0000-0003-4678-4982 (2021) Reconstructing permafrost sedimentological characteristics and post- depositional processes of the Yedoma stratotype Duvanny Yar, Siberia , Frontiers in Earth Science . doi:10.3389/feart.2021.727315 <https://doi.org/10.3389/feart.2021.727315> , hdl:10013/epic.f8febc34-12f6-44e0-a598-b5f194e3c51e EPIC3Frontiers in Earth Science Article isiRev 2021 ftawi https://doi.org/10.3389/feart.2021.727315 2024-04-23T23:38:07Z 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Frontiers in Earth Science 9 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 |
Shmelev, Denis Cherbunina, Maria Rogov, Victor Opfergelt, Sophie Monhonval, Arthur Strauss, Jens |
spellingShingle |
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 |
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 |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54677/ https://epic.awi.de/id/eprint/54677/2/feart-09-727315.pdf https://www.frontiersin.org/articles/10.3389/feart.2021.727315/abstract https://hdl.handle.net/10013/epic.f8febc34-12f6-44e0-a598-b5f194e3c51e |
genre |
Ice permafrost Siberia |
genre_facet |
Ice permafrost Siberia |
op_source |
EPIC3Frontiers in Earth Science |
op_relation |
https://epic.awi.de/id/eprint/54677/2/feart-09-727315.pdf Shmelev, D. , Cherbunina, M. , Rogov, V. , Opfergelt, S. , Monhonval, A. and Strauss, J. orcid:0000-0003-4678-4982 (2021) Reconstructing permafrost sedimentological characteristics and post- depositional processes of the Yedoma stratotype Duvanny Yar, Siberia , Frontiers in Earth Science . doi:10.3389/feart.2021.727315 <https://doi.org/10.3389/feart.2021.727315> , hdl:10013/epic.f8febc34-12f6-44e0-a598-b5f194e3c51e |
op_doi |
https://doi.org/10.3389/feart.2021.727315 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
_version_ |
1799481496844632064 |