Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts
The alkaline basaltic magmas at Mt. Overlord (northern Victoria Land, Antarctica) entrained abundant ultramafic xenoliths (wehrlites, clinopyroxenites and hornblendites). Textures, bulk rock compositions, mineral chemistry and thermobarometric calculations indicate that the xenoliths represent cumul...
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ftunivromairis:oai:iris.uniroma1.it:11573/908722 2024-02-27T08:33:37+00:00 Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts PERINELLI, cristina GAETA, Mario Armienti, Pietro Perinelli, Cristina Gaeta, Mario Armienti, Pietro 2017 STAMPA http://hdl.handle.net/11573/908722 https://doi.org/10.1016/j.lithos.2016.10.027 eng eng Elsevier info:eu-repo/semantics/altIdentifier/wos/WOS:000392680400015 volume:268-271 firstpage:225 lastpage:239 numberofpages:15 journal:LITHOS http://hdl.handle.net/11573/908722 doi:10.1016/j.lithos.2016.10.027 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84995934727 info:eu-repo/semantics/closedAccess cumulate xenolith hydrous mantle basalt high pressure storage and differentiation wet and hot deep zone northern Victoria Land Antarctica info:eu-repo/semantics/article 2017 ftunivromairis https://doi.org/10.1016/j.lithos.2016.10.027 2024-01-31T17:52:57Z The alkaline basaltic magmas at Mt. Overlord (northern Victoria Land, Antarctica) entrained abundant ultramafic xenoliths (wehrlites, clinopyroxenites and hornblendites). Textures, bulk rock compositions, mineral chemistry and thermobarometric calculations indicate that the xenoliths represent cumulates that crystallised at the mantle–crust boundary. In particular, the major and trace element compositions of the bulk rocks and minerals indicate that the Mt. Overlord cumulates were formed through processes of crystal fractionation that affected hydrous basanitic magmas. Some of the xenoliths have textural features that suggest a lengthy (>13 Myr) post-emplacement history at relatively low temperatures (1050–1100 °C) and high pressures (0.8 to 1.4 GPa) and that their primary parental melts were therefore related to the earliest phases of Cenozoic magmatism. These processes produced a “wet and hot deep zone” that had a strong influence on the thermochemical evolution of the lower crust beneath Mt. Overlord. Article in Journal/Newspaper Antarc* Antarctica Victoria Land Sapienza Università di Roma: CINECA IRIS Overlord ENVELOPE(164.600,164.600,-73.167,-73.167) Victoria Land Lithos 268-271 225 239 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
cumulate xenolith hydrous mantle basalt high pressure storage and differentiation wet and hot deep zone northern Victoria Land Antarctica |
spellingShingle |
cumulate xenolith hydrous mantle basalt high pressure storage and differentiation wet and hot deep zone northern Victoria Land Antarctica PERINELLI, cristina GAETA, Mario Armienti, Pietro Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts |
topic_facet |
cumulate xenolith hydrous mantle basalt high pressure storage and differentiation wet and hot deep zone northern Victoria Land Antarctica |
description |
The alkaline basaltic magmas at Mt. Overlord (northern Victoria Land, Antarctica) entrained abundant ultramafic xenoliths (wehrlites, clinopyroxenites and hornblendites). Textures, bulk rock compositions, mineral chemistry and thermobarometric calculations indicate that the xenoliths represent cumulates that crystallised at the mantle–crust boundary. In particular, the major and trace element compositions of the bulk rocks and minerals indicate that the Mt. Overlord cumulates were formed through processes of crystal fractionation that affected hydrous basanitic magmas. Some of the xenoliths have textural features that suggest a lengthy (>13 Myr) post-emplacement history at relatively low temperatures (1050–1100 °C) and high pressures (0.8 to 1.4 GPa) and that their primary parental melts were therefore related to the earliest phases of Cenozoic magmatism. These processes produced a “wet and hot deep zone” that had a strong influence on the thermochemical evolution of the lower crust beneath Mt. Overlord. |
author2 |
Perinelli, Cristina Gaeta, Mario Armienti, Pietro |
format |
Article in Journal/Newspaper |
author |
PERINELLI, cristina GAETA, Mario Armienti, Pietro |
author_facet |
PERINELLI, cristina GAETA, Mario Armienti, Pietro |
author_sort |
PERINELLI, cristina |
title |
Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts |
title_short |
Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts |
title_full |
Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts |
title_fullStr |
Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts |
title_full_unstemmed |
Cumulate xenoliths from Mt. Overlord, northern Victoria Land, Antarctica. A window into high pressure storage and differentiation of mantle-derived basalts |
title_sort |
cumulate xenoliths from mt. overlord, northern victoria land, antarctica. a window into high pressure storage and differentiation of mantle-derived basalts |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://hdl.handle.net/11573/908722 https://doi.org/10.1016/j.lithos.2016.10.027 |
long_lat |
ENVELOPE(164.600,164.600,-73.167,-73.167) |
geographic |
Overlord Victoria Land |
geographic_facet |
Overlord Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000392680400015 volume:268-271 firstpage:225 lastpage:239 numberofpages:15 journal:LITHOS http://hdl.handle.net/11573/908722 doi:10.1016/j.lithos.2016.10.027 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84995934727 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.lithos.2016.10.027 |
container_title |
Lithos |
container_volume |
268-271 |
container_start_page |
225 |
op_container_end_page |
239 |
_version_ |
1792046625785380864 |