Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica
The high elevation and rugged relief (>3 km) of the Gamburtsev Subglacial Mountains (GSM) have long been considered enigmatic. Orogenesis normally occurs near plate boundaries, not cratonic interiors, and large‐scale tectonic activity last occurred in East Antarctica during the Pan‐African (480–6...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2010
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Online Access: | https://authors.library.caltech.edu/21429/ https://authors.library.caltech.edu/21429/1/Cox2010p12239Geophys_Res_Lett.pdf https://authors.library.caltech.edu/21429/2/2010gl045106-ts01.pdf https://authors.library.caltech.edu/21429/3/2010gl045106-ts02.pdf https://authors.library.caltech.edu/21429/4/2010gl045106-txts01.pdf https://authors.library.caltech.edu/21429/5/2010gl045106-txts02.pdf https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447 |
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ftcaltechauth:oai:authors.library.caltech.edu:21429 2023-05-15T13:37:31+02:00 Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica Cox, S. E. Thomson, S. N. Reiners, P. W. Hemming, S. R. van de Flierdt, T. 2010-11-20 application/pdf https://authors.library.caltech.edu/21429/ https://authors.library.caltech.edu/21429/1/Cox2010p12239Geophys_Res_Lett.pdf https://authors.library.caltech.edu/21429/2/2010gl045106-ts01.pdf https://authors.library.caltech.edu/21429/3/2010gl045106-ts02.pdf https://authors.library.caltech.edu/21429/4/2010gl045106-txts01.pdf https://authors.library.caltech.edu/21429/5/2010gl045106-txts02.pdf https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447 en eng American Geophysical Union https://authors.library.caltech.edu/21429/1/Cox2010p12239Geophys_Res_Lett.pdf https://authors.library.caltech.edu/21429/2/2010gl045106-ts01.pdf https://authors.library.caltech.edu/21429/3/2010gl045106-ts02.pdf https://authors.library.caltech.edu/21429/4/2010gl045106-txts01.pdf https://authors.library.caltech.edu/21429/5/2010gl045106-txts02.pdf Cox, S. E. and Thomson, S. N. and Reiners, P. W. and Hemming, S. R. and van de Flierdt, T. (2010) Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica. Geophysical Research Letters, 37 . Art. No. L22307 . ISSN 0094-8276. doi:10.1029/2010GL045106. https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447 <https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447> other Article PeerReviewed 2010 ftcaltechauth https://doi.org/10.1029/2010GL045106 2021-11-11T18:45:54Z The high elevation and rugged relief (>3 km) of the Gamburtsev Subglacial Mountains (GSM) have long been considered enigmatic. Orogenesis normally occurs near plate boundaries, not cratonic interiors, and large‐scale tectonic activity last occurred in East Antarctica during the Pan‐African (480–600 Ma). We sampled detrital apatite from Eocene sands in Prydz Bay at the terminus of the Lambert Graben, which drained a large pre‐glacial basin including the northern Gamburtsev Mountains. Apatite fission‐track and (U‐Th)/He cooling ages constrain bedrock erosion rates throughout the catchment. We double‐dated apatites to resolve individual cooling histories. Erosion was very slow, averaging 0.01–0.02 km/Myr for >250 Myr, supporting the preservation of high elevation in interior East Antarctica since at least the cessation of Permian rifting. Long‐term topographic preservation lends credence to postulated high‐elevation mountain ice caps in East Antarctica since at least the Cretaceous and to the idea that cold‐based glaciation can preserve tectonically inactive topography. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Prydz Bay Caltech Authors (California Institute of Technology) East Antarctica Gamburtsev Subglacial Mountains ENVELOPE(76.000,76.000,-80.500,-80.500) Prydz Bay Geophysical Research Letters 37 22 n/a n/a |
institution |
Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
The high elevation and rugged relief (>3 km) of the Gamburtsev Subglacial Mountains (GSM) have long been considered enigmatic. Orogenesis normally occurs near plate boundaries, not cratonic interiors, and large‐scale tectonic activity last occurred in East Antarctica during the Pan‐African (480–600 Ma). We sampled detrital apatite from Eocene sands in Prydz Bay at the terminus of the Lambert Graben, which drained a large pre‐glacial basin including the northern Gamburtsev Mountains. Apatite fission‐track and (U‐Th)/He cooling ages constrain bedrock erosion rates throughout the catchment. We double‐dated apatites to resolve individual cooling histories. Erosion was very slow, averaging 0.01–0.02 km/Myr for >250 Myr, supporting the preservation of high elevation in interior East Antarctica since at least the cessation of Permian rifting. Long‐term topographic preservation lends credence to postulated high‐elevation mountain ice caps in East Antarctica since at least the Cretaceous and to the idea that cold‐based glaciation can preserve tectonically inactive topography. |
format |
Article in Journal/Newspaper |
author |
Cox, S. E. Thomson, S. N. Reiners, P. W. Hemming, S. R. van de Flierdt, T. |
spellingShingle |
Cox, S. E. Thomson, S. N. Reiners, P. W. Hemming, S. R. van de Flierdt, T. Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica |
author_facet |
Cox, S. E. Thomson, S. N. Reiners, P. W. Hemming, S. R. van de Flierdt, T. |
author_sort |
Cox, S. E. |
title |
Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica |
title_short |
Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica |
title_full |
Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica |
title_fullStr |
Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica |
title_full_unstemmed |
Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica |
title_sort |
extremely low long‐term erosion rates around the gamburtsev mountains in interior east antarctica |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
https://authors.library.caltech.edu/21429/ https://authors.library.caltech.edu/21429/1/Cox2010p12239Geophys_Res_Lett.pdf https://authors.library.caltech.edu/21429/2/2010gl045106-ts01.pdf https://authors.library.caltech.edu/21429/3/2010gl045106-ts02.pdf https://authors.library.caltech.edu/21429/4/2010gl045106-txts01.pdf https://authors.library.caltech.edu/21429/5/2010gl045106-txts02.pdf https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447 |
long_lat |
ENVELOPE(76.000,76.000,-80.500,-80.500) |
geographic |
East Antarctica Gamburtsev Subglacial Mountains Prydz Bay |
geographic_facet |
East Antarctica Gamburtsev Subglacial Mountains Prydz Bay |
genre |
Antarc* Antarctica East Antarctica Prydz Bay |
genre_facet |
Antarc* Antarctica East Antarctica Prydz Bay |
op_relation |
https://authors.library.caltech.edu/21429/1/Cox2010p12239Geophys_Res_Lett.pdf https://authors.library.caltech.edu/21429/2/2010gl045106-ts01.pdf https://authors.library.caltech.edu/21429/3/2010gl045106-ts02.pdf https://authors.library.caltech.edu/21429/4/2010gl045106-txts01.pdf https://authors.library.caltech.edu/21429/5/2010gl045106-txts02.pdf Cox, S. E. and Thomson, S. N. and Reiners, P. W. and Hemming, S. R. and van de Flierdt, T. (2010) Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica. Geophysical Research Letters, 37 . Art. No. L22307 . ISSN 0094-8276. doi:10.1029/2010GL045106. https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447 <https://resolver.caltech.edu/CaltechAUTHORS:20101220-100635447> |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2010GL045106 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
22 |
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n/a |
op_container_end_page |
n/a |
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1766092827601666048 |