Controls on subaerial erosion rates in Antarctica
Erosion rates offer insight on landscape development and the relative importance of chemical and physical processes of weathering. Minimal chemical weathering makes Antarctica an ideal location in which to compare the physical weathering of carbonate rocks to other lithologies. Here we report the fi...
Published in: | Earth and Planetary Science Letters |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:129052 2023-05-15T13:48:37+02:00 Controls on subaerial erosion rates in Antarctica Marrero, Shasta M. Hein, Andrew S. Naylor, Mark Attal, Mikael Shanks, Richard Winter, Kate Woodward, John Dunning, Stuart Westoby, Matthew Sugden, David 2018-11-01 https://orca.cardiff.ac.uk/id/eprint/129052/ https://doi.org/10.1016/j.epsl.2018.08.018 unknown Elsevier Marrero, Shasta M. https://orca.cardiff.ac.uk/view/cardiffauthors/A2529897K.html orcid:0000-0003-2917-0292 orcid:0000-0003-2917-0292, Hein, Andrew S., Naylor, Mark, Attal, Mikael, Shanks, Richard, Winter, Kate, Woodward, John, Dunning, Stuart, Westoby, Matthew and Sugden, David 2018. Controls on subaerial erosion rates in Antarctica. Earth and Planetary Science Letters 501 , 56--66. 10.1016/j.epsl.2018.08.018 https://doi.org/10.1016/j.epsl.2018.08.018 doi:10.1016/j.epsl.2018.08.018 Article PeerReviewed 2018 ftunivcardiff https://doi.org/10.1016/j.epsl.2018.08.018 2022-11-10T23:35:49Z Erosion rates offer insight on landscape development and the relative importance of chemical and physical processes of weathering. Minimal chemical weathering makes Antarctica an ideal location in which to compare the physical weathering of carbonate rocks to other lithologies. Here we report the first cosmogenic nuclide-derived erosion rates for carbonate rocks in Antarctica. Carbonate samples collected in the southernmost Ellsworth Mountains reflect a 36Cl erosion rate of 0.22 ± 0.02 mm/ka. This erosion rate is consistent with other reported Antarctic erosion rates, but is lower than 36Cl erosion rates derived from other arid regions in the world. These results are integrated with a continent-wide reanalysis of 28 cosmogenic nuclide erosion rate studies (>200 measurements), which comprise numerous rock types and multiple cosmogenic nuclides. By combining cosmogenic nuclide-derived erosion rates across studies, the larger trends provide insight into factors (e.g. lithology, glacial history, and availability of abrasive material) affecting subaerial erosion rates in Antarctica. Statistical analysis of the compiled data set shows differences based on lithology, with sandstone having the largest range of erosion rates. The compiled data also reveals higher erosion rates in areas with a large potential sediment supply, like the Dry Valleys. Samples collected from boulders yield lower erosion rates than those collected from bedrock, likely due to a combination of physical processes that affect boulders and bedrock differently, and glacial history, which can affect the apparent cosmogenic-nuclide derived erosion rate. Article in Journal/Newspaper Antarc* Antarctic Antarctica Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Ellsworth Mountains ENVELOPE(-85.000,-85.000,-78.750,-78.750) Earth and Planetary Science Letters 501 56 66 |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
description |
Erosion rates offer insight on landscape development and the relative importance of chemical and physical processes of weathering. Minimal chemical weathering makes Antarctica an ideal location in which to compare the physical weathering of carbonate rocks to other lithologies. Here we report the first cosmogenic nuclide-derived erosion rates for carbonate rocks in Antarctica. Carbonate samples collected in the southernmost Ellsworth Mountains reflect a 36Cl erosion rate of 0.22 ± 0.02 mm/ka. This erosion rate is consistent with other reported Antarctic erosion rates, but is lower than 36Cl erosion rates derived from other arid regions in the world. These results are integrated with a continent-wide reanalysis of 28 cosmogenic nuclide erosion rate studies (>200 measurements), which comprise numerous rock types and multiple cosmogenic nuclides. By combining cosmogenic nuclide-derived erosion rates across studies, the larger trends provide insight into factors (e.g. lithology, glacial history, and availability of abrasive material) affecting subaerial erosion rates in Antarctica. Statistical analysis of the compiled data set shows differences based on lithology, with sandstone having the largest range of erosion rates. The compiled data also reveals higher erosion rates in areas with a large potential sediment supply, like the Dry Valleys. Samples collected from boulders yield lower erosion rates than those collected from bedrock, likely due to a combination of physical processes that affect boulders and bedrock differently, and glacial history, which can affect the apparent cosmogenic-nuclide derived erosion rate. |
format |
Article in Journal/Newspaper |
author |
Marrero, Shasta M. Hein, Andrew S. Naylor, Mark Attal, Mikael Shanks, Richard Winter, Kate Woodward, John Dunning, Stuart Westoby, Matthew Sugden, David |
spellingShingle |
Marrero, Shasta M. Hein, Andrew S. Naylor, Mark Attal, Mikael Shanks, Richard Winter, Kate Woodward, John Dunning, Stuart Westoby, Matthew Sugden, David Controls on subaerial erosion rates in Antarctica |
author_facet |
Marrero, Shasta M. Hein, Andrew S. Naylor, Mark Attal, Mikael Shanks, Richard Winter, Kate Woodward, John Dunning, Stuart Westoby, Matthew Sugden, David |
author_sort |
Marrero, Shasta M. |
title |
Controls on subaerial erosion rates in Antarctica |
title_short |
Controls on subaerial erosion rates in Antarctica |
title_full |
Controls on subaerial erosion rates in Antarctica |
title_fullStr |
Controls on subaerial erosion rates in Antarctica |
title_full_unstemmed |
Controls on subaerial erosion rates in Antarctica |
title_sort |
controls on subaerial erosion rates in antarctica |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://orca.cardiff.ac.uk/id/eprint/129052/ https://doi.org/10.1016/j.epsl.2018.08.018 |
long_lat |
ENVELOPE(-85.000,-85.000,-78.750,-78.750) |
geographic |
Antarctic Ellsworth Mountains |
geographic_facet |
Antarctic Ellsworth Mountains |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Marrero, Shasta M. https://orca.cardiff.ac.uk/view/cardiffauthors/A2529897K.html orcid:0000-0003-2917-0292 orcid:0000-0003-2917-0292, Hein, Andrew S., Naylor, Mark, Attal, Mikael, Shanks, Richard, Winter, Kate, Woodward, John, Dunning, Stuart, Westoby, Matthew and Sugden, David 2018. Controls on subaerial erosion rates in Antarctica. Earth and Planetary Science Letters 501 , 56--66. 10.1016/j.epsl.2018.08.018 https://doi.org/10.1016/j.epsl.2018.08.018 doi:10.1016/j.epsl.2018.08.018 |
op_doi |
https://doi.org/10.1016/j.epsl.2018.08.018 |
container_title |
Earth and Planetary Science Letters |
container_volume |
501 |
container_start_page |
56 |
op_container_end_page |
66 |
_version_ |
1766249507141451776 |