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...

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Published in:Earth and Planetary Science Letters
Main Authors: Marrero, Shasta M., Hein, Andrew S., Naylor, Mark, Attal, Mikael, Shanks, Richard, Winter, Kate, Woodward, John, Dunning, Stuart, Westoby, Matthew, Sugden, David
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2018
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Online Access:http://eprints.gla.ac.uk/166684/
http://eprints.gla.ac.uk/166684/2/166684Suppl.pdf
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spelling ftuglasgow:oai:eprints.gla.ac.uk:166684 2023-05-15T13:54:32+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 text other http://eprints.gla.ac.uk/166684/ http://eprints.gla.ac.uk/166684/2/166684Suppl.pdf http://eprints.gla.ac.uk/166684/3/166684SupplData.xlsx http://eprints.gla.ac.uk/166684/14/166684.pdf en eng Elsevier http://eprints.gla.ac.uk/166684/2/166684Suppl.pdf http://eprints.gla.ac.uk/166684/3/166684SupplData.xlsx http://eprints.gla.ac.uk/166684/14/166684.pdf Marrero, S. M., Hein, A. S., Naylor, M., Attal, M., Shanks, R. <http://eprints.gla.ac.uk/view/author/15948.html> , Winter, K., Woodward, J., Dunning, S., Westoby, M. and Sugden, D. (2018) Controls on subaerial erosion rates in Antarctica. Earth and Planetary Science Letters <http://eprints.gla.ac.uk/view/journal_volume/Earth_and_Planetary_Science_Letters.html>, 501, pp. 56-66. (doi:10.1016/j.epsl.2018.08.018 <http://dx.doi.org/10.1016/j.epsl.2018.08.018>) cc_by_4 CC-BY Articles PeerReviewed 2018 ftuglasgow https://doi.org/10.1016/j.epsl.2018.08.018 2020-05-28T22:23:13Z 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 erosion rate studies (>200 measurements), which comprise numerous rock types and other 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 University of Glasgow: Enlighten - Publications Antarctic Ellsworth Mountains ENVELOPE(-85.000,-85.000,-78.750,-78.750) Earth and Planetary Science Letters 501 56 66
institution Open Polar
collection University of Glasgow: Enlighten - Publications
op_collection_id ftuglasgow
language English
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 erosion rate studies (>200 measurements), which comprise numerous rock types and other 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 http://eprints.gla.ac.uk/166684/
http://eprints.gla.ac.uk/166684/2/166684Suppl.pdf
http://eprints.gla.ac.uk/166684/3/166684SupplData.xlsx
http://eprints.gla.ac.uk/166684/14/166684.pdf
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
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Marrero, S. M., Hein, A. S., Naylor, M., Attal, M., Shanks, R. <http://eprints.gla.ac.uk/view/author/15948.html> , Winter, K., Woodward, J., Dunning, S., Westoby, M. and Sugden, D. (2018) Controls on subaerial erosion rates in Antarctica. Earth and Planetary Science Letters <http://eprints.gla.ac.uk/view/journal_volume/Earth_and_Planetary_Science_Letters.html>, 501, pp. 56-66. (doi:10.1016/j.epsl.2018.08.018 <http://dx.doi.org/10.1016/j.epsl.2018.08.018>)
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container_title Earth and Planetary Science Letters
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