Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland
Mountain regions at high altitudes show deeply incised glacial valleys that coexist with a high-standing low-relief landscape, whose origin is largely debated. Whether the plateaus contributed to sediment production during the late Cenozoic is a currently debated issue in glacial geomorphology and p...
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ftpubmed:oai:pubmedcentral.nih.gov:9200846 2023-05-15T16:27:59+02:00 Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland Olivetti, Valerio Cattò, Silvia Zattin, Massimiliano 2022-06-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9200846/ https://doi.org/10.1038/s41598-022-14129-6 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9200846/ http://dx.doi.org/10.1038/s41598-022-14129-6 © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Sci Rep Article Text 2022 ftpubmed https://doi.org/10.1038/s41598-022-14129-6 2022-06-19T01:02:16Z Mountain regions at high altitudes show deeply incised glacial valleys that coexist with a high-standing low-relief landscape, whose origin is largely debated. Whether the plateaus contributed to sediment production during the late Cenozoic is a currently debated issue in glacial geomorphology and paleoclimatology. In this study, we used detrital apatite fission-track dating of marine sediments to trace provenance and spatial variation in focused erosion over the last 7 million years. The decomposition of age distributions into populations reveals that, moving upwards through the sections, two young populations get younger, while two older populations get progressively older. We interpreted these trends as the effect of glacial erosion on the valley floors and an increased sediment contribution from the high elevations. To test this hypothesis, we compared the measured ages with synthetic age distributions, which represented a change in the elevation of focused erosion. We conclude that the central-eastern Greenland region is the main source of sediments, and in addition to enhanced valley incision, sediments have also been sourced from progressively higher elevations since 7 Ma. The ageing trend provides an unusual case in detrital thermochronology and a strong evidence that intensified Quaternary glaciations amplify the erosional process both in valley bottoms and at high elevations. Text Greenland PubMed Central (PMC) Greenland Scientific Reports 12 1 |
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Article Olivetti, Valerio Cattò, Silvia Zattin, Massimiliano Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland |
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Mountain regions at high altitudes show deeply incised glacial valleys that coexist with a high-standing low-relief landscape, whose origin is largely debated. Whether the plateaus contributed to sediment production during the late Cenozoic is a currently debated issue in glacial geomorphology and paleoclimatology. In this study, we used detrital apatite fission-track dating of marine sediments to trace provenance and spatial variation in focused erosion over the last 7 million years. The decomposition of age distributions into populations reveals that, moving upwards through the sections, two young populations get younger, while two older populations get progressively older. We interpreted these trends as the effect of glacial erosion on the valley floors and an increased sediment contribution from the high elevations. To test this hypothesis, we compared the measured ages with synthetic age distributions, which represented a change in the elevation of focused erosion. We conclude that the central-eastern Greenland region is the main source of sediments, and in addition to enhanced valley incision, sediments have also been sourced from progressively higher elevations since 7 Ma. The ageing trend provides an unusual case in detrital thermochronology and a strong evidence that intensified Quaternary glaciations amplify the erosional process both in valley bottoms and at high elevations. |
format |
Text |
author |
Olivetti, Valerio Cattò, Silvia Zattin, Massimiliano |
author_facet |
Olivetti, Valerio Cattò, Silvia Zattin, Massimiliano |
author_sort |
Olivetti, Valerio |
title |
Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland |
title_short |
Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland |
title_full |
Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland |
title_fullStr |
Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland |
title_full_unstemmed |
Increased erosion of high-elevation land during late Cenozoic: evidence from detrital thermochronology off-shore Greenland |
title_sort |
increased erosion of high-elevation land during late cenozoic: evidence from detrital thermochronology off-shore greenland |
publisher |
Nature Publishing Group UK |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9200846/ https://doi.org/10.1038/s41598-022-14129-6 |
geographic |
Greenland |
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Greenland |
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Greenland |
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Greenland |
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Sci Rep |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9200846/ http://dx.doi.org/10.1038/s41598-022-14129-6 |
op_rights |
© The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
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CC-BY |
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https://doi.org/10.1038/s41598-022-14129-6 |
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