Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths
Thermobarometry of spinel peridotites collected in northern Victoria Land in Cenozoic basalts of the Mt Melbourne Volcanic Province, reveals warming of local lithospheric mantle, marked by a shift of geothermal gradient from 0.5. °C/km to ̃3. °C/km during the development of Cenozoic magmatism relate...
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Online Access: | http://hdl.handle.net/11568/138663 https://doi.org/10.1016/j.tecto.2010.02.006 |
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ftunivpisairis:oai:arpi.unipi.it:11568/138663 2024-02-27T08:33:30+00:00 Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths ARMIENTI, PIETRO CRISTINA PERINELLI Armienti, Pietro Cristina, Perinelli 2010 STAMPA http://hdl.handle.net/11568/138663 https://doi.org/10.1016/j.tecto.2010.02.006 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000278216400003 volume:486 firstpage:28 lastpage:35 numberofpages:8 journal:TECTONOPHYSICS http://hdl.handle.net/11568/138663 doi:10.1016/j.tecto.2010.02.006 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77952009776 info:eu-repo/semantics/article 2010 ftunivpisairis https://doi.org/10.1016/j.tecto.2010.02.006 2024-01-31T17:42:24Z Thermobarometry of spinel peridotites collected in northern Victoria Land in Cenozoic basalts of the Mt Melbourne Volcanic Province, reveals warming of local lithospheric mantle, marked by a shift of geothermal gradient from 0.5. °C/km to ̃3. °C/km during the development of Cenozoic magmatism related to the opening of the Ross Sea rift system. We suggest that a significant uplift fraction of the rift shoulder on the West Antarctic margin is due to the change in olivine molar volume induced by mantle heating. The heat source is provided by enhancement of asthenospheric convection induced by an "edge effect" in the mantle circulation, following the opening phase of the Ross Sea. Besides explaining the asymmetric uplift of the rift shoulder corresponding to the Transantarctic Mountains, this mechanism satisfactorily accounts for the time scale (̃10. Ma) and most of total uplift (̃3000m) of the western border of the Ross Sea in northern Victoria Land. © 2010 Elsevier B.V. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic Ross Sea Transantarctic Mountains Victoria Land Tectonophysics 486 1-4 28 35 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
description |
Thermobarometry of spinel peridotites collected in northern Victoria Land in Cenozoic basalts of the Mt Melbourne Volcanic Province, reveals warming of local lithospheric mantle, marked by a shift of geothermal gradient from 0.5. °C/km to ̃3. °C/km during the development of Cenozoic magmatism related to the opening of the Ross Sea rift system. We suggest that a significant uplift fraction of the rift shoulder on the West Antarctic margin is due to the change in olivine molar volume induced by mantle heating. The heat source is provided by enhancement of asthenospheric convection induced by an "edge effect" in the mantle circulation, following the opening phase of the Ross Sea. Besides explaining the asymmetric uplift of the rift shoulder corresponding to the Transantarctic Mountains, this mechanism satisfactorily accounts for the time scale (̃10. Ma) and most of total uplift (̃3000m) of the western border of the Ross Sea in northern Victoria Land. © 2010 Elsevier B.V. |
author2 |
Armienti, Pietro Cristina, Perinelli |
format |
Article in Journal/Newspaper |
author |
ARMIENTI, PIETRO CRISTINA PERINELLI |
spellingShingle |
ARMIENTI, PIETRO CRISTINA PERINELLI Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths |
author_facet |
ARMIENTI, PIETRO CRISTINA PERINELLI |
author_sort |
ARMIENTI, PIETRO |
title |
Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths |
title_short |
Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths |
title_full |
Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths |
title_fullStr |
Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths |
title_full_unstemmed |
Cenozoic thermal evolution of lithospheric mantle in northern Victoria Land (Antarctica): Evidences from mantle xenoliths |
title_sort |
cenozoic thermal evolution of lithospheric mantle in northern victoria land (antarctica): evidences from mantle xenoliths |
publishDate |
2010 |
url |
http://hdl.handle.net/11568/138663 https://doi.org/10.1016/j.tecto.2010.02.006 |
geographic |
Antarctic Ross Sea Transantarctic Mountains Victoria Land |
geographic_facet |
Antarctic Ross Sea Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctic Antarctica Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000278216400003 volume:486 firstpage:28 lastpage:35 numberofpages:8 journal:TECTONOPHYSICS http://hdl.handle.net/11568/138663 doi:10.1016/j.tecto.2010.02.006 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77952009776 |
op_doi |
https://doi.org/10.1016/j.tecto.2010.02.006 |
container_title |
Tectonophysics |
container_volume |
486 |
container_issue |
1-4 |
container_start_page |
28 |
op_container_end_page |
35 |
_version_ |
1792045966471200768 |