Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes
We present 21Ne exposure ages of erosional glaciogenic rock surfaces on nunataks in northern Victoria Land, Antarctica: i) in the Prince Albert Mountains and ii) near Mesa Range. These nunataks are located directly at the margin of the polar plateau and therefore provide an immediate record of ice v...
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-Cambridge University Press / New York:40 West 20th Street:New York, NY 10011:(800)872-7423, (212)924-3900, EMAIL: journals_subscriptions@cup.org, INTERNET: http://www.journals.cambridge.org, Fax: (212)691-3239 -Oxford: Blackwell Scientific Publications.
2008
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Online Access: | http://hdl.handle.net/11573/37807 https://doi.org/10.1017/s095410200700079x http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000253173400010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a http://www.scopus.com/inward/record.url?eid=2-s2.0-38149075334&partnerID=65&md5=4a5584c66824836fb5ea0257cdf0419b |
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ftunivromairis:oai:iris.uniroma1.it:11573/37807 2024-02-11T09:56:10+01:00 Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes P. Oberholzer C. Baroni H. Baur R. Wieler SALVATORE, Maria Cristina P., Oberholzer C., Baroni Salvatore, Maria Cristina H., Baur R., Wieler 2008 STAMPA http://hdl.handle.net/11573/37807 https://doi.org/10.1017/s095410200700079x http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000253173400010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a http://www.scopus.com/inward/record.url?eid=2-s2.0-38149075334&partnerID=65&md5=4a5584c66824836fb5ea0257cdf0419b eng eng -Cambridge University Press / New York:40 West 20th Street:New York, NY 10011:(800)872-7423, (212)924-3900, EMAIL: journals_subscriptions@cup.org, INTERNET: http://www.journals.cambridge.org, Fax: (212)691-3239 -Oxford: Blackwell Scientific Publications. info:eu-repo/semantics/altIdentifier/wos/WOS:000253173400010 volume:20 issue:1 firstpage:89 lastpage:98 numberofpages:10 journal:ANTARCTIC SCIENCE http://hdl.handle.net/11573/37807 doi:10.1017/s095410200700079x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-38149075334 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000253173400010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a http://www.scopus.com/inward/record.url?eid=2-s2.0-38149075334&partnerID=65&md5=4a5584c66824836fb5ea0257cdf0419b antarctic tor east antarctic ice sheet mesa range noble gase prince albert mountain surface exposure dating info:eu-repo/semantics/article 2008 ftunivromairis https://doi.org/10.1017/s095410200700079x 2024-01-24T17:43:21Z We present 21Ne exposure ages of erosional glaciogenic rock surfaces on nunataks in northern Victoria Land, Antarctica: i) in the Prince Albert Mountains and ii) near Mesa Range. These nunataks are located directly at the margin of the polar plateau and therefore provide an immediate record of ice volume changes of the East Antarctic Ice Sheet, not biased by ice shelf grounding or narrow valley sections downstream the outlet glaciers. The sampling locations overlook the present ice surface by less than 200 m, but were last covered by ice 3.5 Ma bp (minimum age, not corrected for erosion). This strongly indicates that the ice sheet has not been substantially thicker than today since at least the early Pliocene, which supports the hypothesis of a stable East Antarctic Ice Sheet. First absolute ages are reported for the alpine topography above the erosive trimline that typically marks the upper limit of glacial activity in northern Victoria Land. Unexpectedly low nuclide concentrations suggest that erosion rates on the alpine topography are considerably higher due to the steep slopes than those affecting flat erosional surfaces carrying Antarctic tors. © 2008 Antarctic Science Ltd. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Victoria Land Sapienza Università di Roma: CINECA IRIS Antarctic East Antarctic Ice Sheet Mesa Range ENVELOPE(162.917,162.917,-73.183,-73.183) Polar Plateau ENVELOPE(0.000,0.000,-90.000,-90.000) Prince Albert Mountains ENVELOPE(161.500,161.500,-76.000,-76.000) Victoria ENVELOPE(-69.895,-69.895,80.792,80.792) Victoria Land Antarctic Science 20 1 89 98 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
antarctic tor east antarctic ice sheet mesa range noble gase prince albert mountain surface exposure dating |
spellingShingle |
antarctic tor east antarctic ice sheet mesa range noble gase prince albert mountain surface exposure dating P. Oberholzer C. Baroni H. Baur R. Wieler SALVATORE, Maria Cristina Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes |
topic_facet |
antarctic tor east antarctic ice sheet mesa range noble gase prince albert mountain surface exposure dating |
description |
We present 21Ne exposure ages of erosional glaciogenic rock surfaces on nunataks in northern Victoria Land, Antarctica: i) in the Prince Albert Mountains and ii) near Mesa Range. These nunataks are located directly at the margin of the polar plateau and therefore provide an immediate record of ice volume changes of the East Antarctic Ice Sheet, not biased by ice shelf grounding or narrow valley sections downstream the outlet glaciers. The sampling locations overlook the present ice surface by less than 200 m, but were last covered by ice 3.5 Ma bp (minimum age, not corrected for erosion). This strongly indicates that the ice sheet has not been substantially thicker than today since at least the early Pliocene, which supports the hypothesis of a stable East Antarctic Ice Sheet. First absolute ages are reported for the alpine topography above the erosive trimline that typically marks the upper limit of glacial activity in northern Victoria Land. Unexpectedly low nuclide concentrations suggest that erosion rates on the alpine topography are considerably higher due to the steep slopes than those affecting flat erosional surfaces carrying Antarctic tors. © 2008 Antarctic Science Ltd. |
author2 |
P., Oberholzer C., Baroni Salvatore, Maria Cristina H., Baur R., Wieler |
format |
Article in Journal/Newspaper |
author |
P. Oberholzer C. Baroni H. Baur R. Wieler SALVATORE, Maria Cristina |
author_facet |
P. Oberholzer C. Baroni H. Baur R. Wieler SALVATORE, Maria Cristina |
author_sort |
P. Oberholzer |
title |
Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes |
title_short |
Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes |
title_full |
Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes |
title_fullStr |
Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes |
title_full_unstemmed |
Dating late Cenozoic erosional surfaces in Victoria Land, Antarctica, with cosmogenic neon in pyroxenes |
title_sort |
dating late cenozoic erosional surfaces in victoria land, antarctica, with cosmogenic neon in pyroxenes |
publisher |
-Cambridge University Press / New York:40 West 20th Street:New York, NY 10011:(800)872-7423, (212)924-3900, EMAIL: journals_subscriptions@cup.org, INTERNET: http://www.journals.cambridge.org, Fax: (212)691-3239 -Oxford: Blackwell Scientific Publications. |
publishDate |
2008 |
url |
http://hdl.handle.net/11573/37807 https://doi.org/10.1017/s095410200700079x http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000253173400010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a http://www.scopus.com/inward/record.url?eid=2-s2.0-38149075334&partnerID=65&md5=4a5584c66824836fb5ea0257cdf0419b |
long_lat |
ENVELOPE(162.917,162.917,-73.183,-73.183) ENVELOPE(0.000,0.000,-90.000,-90.000) ENVELOPE(161.500,161.500,-76.000,-76.000) ENVELOPE(-69.895,-69.895,80.792,80.792) |
geographic |
Antarctic East Antarctic Ice Sheet Mesa Range Polar Plateau Prince Albert Mountains Victoria Victoria Land |
geographic_facet |
Antarctic East Antarctic Ice Sheet Mesa Range Polar Plateau Prince Albert Mountains Victoria Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000253173400010 volume:20 issue:1 firstpage:89 lastpage:98 numberofpages:10 journal:ANTARCTIC SCIENCE http://hdl.handle.net/11573/37807 doi:10.1017/s095410200700079x info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-38149075334 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000253173400010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a http://www.scopus.com/inward/record.url?eid=2-s2.0-38149075334&partnerID=65&md5=4a5584c66824836fb5ea0257cdf0419b |
op_doi |
https://doi.org/10.1017/s095410200700079x |
container_title |
Antarctic Science |
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20 |
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