Uplift of the central transantarctic mountains
The Transantarctic Mountains (TAM) are the world's longest rift shoulder but the source of their high elevation is enigmatic. To discriminate the importance of mechanical vs. thermal sources of support, a 550 km-long transect of magnetotelluric geophysical soundings spanning the central TAM was...
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ftunivnevadair:oai:scholarworks.unr.edu:11714/5289 2023-05-15T13:41:40+02:00 Uplift of the central transantarctic mountains Wannamaker, Phil Hill, Graham Stodt, John Maris, Virginie Ogawa, Yasuo Selway, Kate Boren, Goran Bertrand, Edward Uhlmann, Daniel Ayling, Bridget Green, A. Marie Feucht, Daniel 2017 PDF http://hdl.handle.net/11714/5289 https://doi.org/10.1038/s41467-017-01577-2 unknown Wannamaker, P., Hill, G., Stodt, J., Maris, V., Ogawa, Y., Selway, K., … Feucht, D. (2017). Uplift of the central transantarctic mountains. Nature Communications, 8(1). doi:10.1038/s41467-017-01577-2 2041-1723 http://hdl.handle.net/11714/5289 doi:10.1038/s41467-017-01577-2 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Authors CC-BY https://doi.org/10.1038/s41467-017-01577-2 Article 2017 ftunivnevadair https://doi.org/10.1038/s41467-017-01577-2 2020-12-09T10:18:50Z The Transantarctic Mountains (TAM) are the world's longest rift shoulder but the source of their high elevation is enigmatic. To discriminate the importance of mechanical vs. thermal sources of support, a 550 km-long transect of magnetotelluric geophysical soundings spanning the central TAM was acquired. These data reveal a lithosphere of high electrical resistivity to at least 150 km depth, implying a cold stable state well into the upper mantle. Here we find that the central TAM most likely are elevated by a non-thermal, flexural cantilever mechanism which is perhaps the most clearly expressed example anywhere. West Antarctica in this region exhibits a low resistivity, moderately hydrated asthenosphere, and concentrated extension (rift necking) near the central TAM range front but with negligible thermal encroachment into the TAM. Broader scale heat flow of east-central West Antarctica appears moderate, on the order of 60-70mWm(-2), lower than that of the U.S. Great Basin. Article in Journal/Newspaper Antarc* Antarctica West Antarctica University of Nevada, Reno: ScholarWorks Repository Transantarctic Mountains West Antarctica Nature Communications 8 1 |
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Open Polar |
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University of Nevada, Reno: ScholarWorks Repository |
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ftunivnevadair |
language |
unknown |
description |
The Transantarctic Mountains (TAM) are the world's longest rift shoulder but the source of their high elevation is enigmatic. To discriminate the importance of mechanical vs. thermal sources of support, a 550 km-long transect of magnetotelluric geophysical soundings spanning the central TAM was acquired. These data reveal a lithosphere of high electrical resistivity to at least 150 km depth, implying a cold stable state well into the upper mantle. Here we find that the central TAM most likely are elevated by a non-thermal, flexural cantilever mechanism which is perhaps the most clearly expressed example anywhere. West Antarctica in this region exhibits a low resistivity, moderately hydrated asthenosphere, and concentrated extension (rift necking) near the central TAM range front but with negligible thermal encroachment into the TAM. Broader scale heat flow of east-central West Antarctica appears moderate, on the order of 60-70mWm(-2), lower than that of the U.S. Great Basin. |
format |
Article in Journal/Newspaper |
author |
Wannamaker, Phil Hill, Graham Stodt, John Maris, Virginie Ogawa, Yasuo Selway, Kate Boren, Goran Bertrand, Edward Uhlmann, Daniel Ayling, Bridget Green, A. Marie Feucht, Daniel |
spellingShingle |
Wannamaker, Phil Hill, Graham Stodt, John Maris, Virginie Ogawa, Yasuo Selway, Kate Boren, Goran Bertrand, Edward Uhlmann, Daniel Ayling, Bridget Green, A. Marie Feucht, Daniel Uplift of the central transantarctic mountains |
author_facet |
Wannamaker, Phil Hill, Graham Stodt, John Maris, Virginie Ogawa, Yasuo Selway, Kate Boren, Goran Bertrand, Edward Uhlmann, Daniel Ayling, Bridget Green, A. Marie Feucht, Daniel |
author_sort |
Wannamaker, Phil |
title |
Uplift of the central transantarctic mountains |
title_short |
Uplift of the central transantarctic mountains |
title_full |
Uplift of the central transantarctic mountains |
title_fullStr |
Uplift of the central transantarctic mountains |
title_full_unstemmed |
Uplift of the central transantarctic mountains |
title_sort |
uplift of the central transantarctic mountains |
publishDate |
2017 |
url |
http://hdl.handle.net/11714/5289 https://doi.org/10.1038/s41467-017-01577-2 |
geographic |
Transantarctic Mountains West Antarctica |
geographic_facet |
Transantarctic Mountains West Antarctica |
genre |
Antarc* Antarctica West Antarctica |
genre_facet |
Antarc* Antarctica West Antarctica |
op_source |
https://doi.org/10.1038/s41467-017-01577-2 |
op_relation |
Wannamaker, P., Hill, G., Stodt, J., Maris, V., Ogawa, Y., Selway, K., … Feucht, D. (2017). Uplift of the central transantarctic mountains. Nature Communications, 8(1). doi:10.1038/s41467-017-01577-2 2041-1723 http://hdl.handle.net/11714/5289 doi:10.1038/s41467-017-01577-2 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Authors |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-017-01577-2 |
container_title |
Nature Communications |
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8 |
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1 |
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1766153630342184960 |