Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica)
The major, trace (including rare earth) element abundances, and Sr-Nd-Pb isotopic compositions, have been analysed for andesitic basalt and andesitic sills and lavas of the Jurassic Ferrar Magmatic Province, Prince Albert Mountains, Antarctica. The typical “crustal signature” of the Ferrar magmatism...
Published in: | Contributions to Mineralogy and Petrology |
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Online Access: | http://hdl.handle.net/11588/137748 https://doi.org/10.1007/s004100050520 |
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ftunivnapoliiris:oai:www.iris.unina.it:11588/137748 2024-09-09T19:02:50+00:00 Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) ANTONINI P. PICCIRILLO E. M. PETRINI R. CIVETTA, LUCIA D'ANTONIO, MASSIMO ORSI, GIOVANNI Antonini, P. Piccirillo, E. M. Petrini, R. Civetta, Lucia D'Antonio, Massimo Orsi, Giovanni 1999 http://hdl.handle.net/11588/137748 https://doi.org/10.1007/s004100050520 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000081850400001 volume:136 issue:1-2 firstpage:1 lastpage:19 numberofpages:19 journal:CONTRIBUTIONS TO MINERALOGY AND PETROLOGY http://hdl.handle.net/11588/137748 doi:10.1007/s004100050520 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0032727348 Ferrar Supergroup info:eu-repo/semantics/article 1999 ftunivnapoliiris https://doi.org/10.1007/s004100050520 2024-06-17T15:19:23Z The major, trace (including rare earth) element abundances, and Sr-Nd-Pb isotopic compositions, have been analysed for andesitic basalt and andesitic sills and lavas of the Jurassic Ferrar Magmatic Province, Prince Albert Mountains, Antarctica. The typical “crustal signature” of the Ferrar magmatism, characterized by relatively high SiO2, LREE and LILE contents in these samples, is associated with high 87Sr/86Sr and low 143Nd/144Nd. Systematic correlations of major and trace elements indicate that fractional crystallization was important. However, increases in incompatible elements are positively correlated with initial 87Sr/86Sr, suggestive of crustal assimilation processes. The observed correlations between initial 87Sr/86Sr and LREE enrichments have been modelled by an AFC process, starting from the least evolved sample and assuming the compositions of the orthogranulites of Victoria Land as contaminants. The REE patterns of the least evolved Ferrar rocks approach those of E-type MORB, differing only by higher LREE/IREE. The enrichment in LREE, accompanying high initial 87Sr/86Sr, 207Pb/204Pb and low 143Nd/144Nd compared with E-type MORB, can be explained by interaction of “primary Ferrar basalt” with crystalline basement. We propose a petrological model whereby Ferrar magmas were generated through high degrees of melting of an E-type MORB mantle source, and subsequently these “primary” melts underwent AFC processes inheriting a crustal signature. The Sr-Nd-Pb isotopic compositions required by the AFC model for the primary Ferrar basalt are similar to those of the Dupal signature of the oceanic basalts of the Southern Hemisphere (Hart 1984). Transantarctic Mountains would have been located inside the Dupal anomaly in pre-Gondwana dispersion times. Article in Journal/Newspaper Antarc* Antarctica Victoria Land IRIS Università degli Studi di Napoli Federico II Victoria Land Transantarctic Mountains Victoria ENVELOPE(-69.895,-69.895,80.792,80.792) Prince Albert Mountains ENVELOPE(161.500,161.500,-76.000,-76.000) Contributions to Mineralogy and Petrology 136 1-2 1 19 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Napoli Federico II |
op_collection_id |
ftunivnapoliiris |
language |
English |
topic |
Ferrar Supergroup |
spellingShingle |
Ferrar Supergroup ANTONINI P. PICCIRILLO E. M. PETRINI R. CIVETTA, LUCIA D'ANTONIO, MASSIMO ORSI, GIOVANNI Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) |
topic_facet |
Ferrar Supergroup |
description |
The major, trace (including rare earth) element abundances, and Sr-Nd-Pb isotopic compositions, have been analysed for andesitic basalt and andesitic sills and lavas of the Jurassic Ferrar Magmatic Province, Prince Albert Mountains, Antarctica. The typical “crustal signature” of the Ferrar magmatism, characterized by relatively high SiO2, LREE and LILE contents in these samples, is associated with high 87Sr/86Sr and low 143Nd/144Nd. Systematic correlations of major and trace elements indicate that fractional crystallization was important. However, increases in incompatible elements are positively correlated with initial 87Sr/86Sr, suggestive of crustal assimilation processes. The observed correlations between initial 87Sr/86Sr and LREE enrichments have been modelled by an AFC process, starting from the least evolved sample and assuming the compositions of the orthogranulites of Victoria Land as contaminants. The REE patterns of the least evolved Ferrar rocks approach those of E-type MORB, differing only by higher LREE/IREE. The enrichment in LREE, accompanying high initial 87Sr/86Sr, 207Pb/204Pb and low 143Nd/144Nd compared with E-type MORB, can be explained by interaction of “primary Ferrar basalt” with crystalline basement. We propose a petrological model whereby Ferrar magmas were generated through high degrees of melting of an E-type MORB mantle source, and subsequently these “primary” melts underwent AFC processes inheriting a crustal signature. The Sr-Nd-Pb isotopic compositions required by the AFC model for the primary Ferrar basalt are similar to those of the Dupal signature of the oceanic basalts of the Southern Hemisphere (Hart 1984). Transantarctic Mountains would have been located inside the Dupal anomaly in pre-Gondwana dispersion times. |
author2 |
Antonini, P. Piccirillo, E. M. Petrini, R. Civetta, Lucia D'Antonio, Massimo Orsi, Giovanni |
format |
Article in Journal/Newspaper |
author |
ANTONINI P. PICCIRILLO E. M. PETRINI R. CIVETTA, LUCIA D'ANTONIO, MASSIMO ORSI, GIOVANNI |
author_facet |
ANTONINI P. PICCIRILLO E. M. PETRINI R. CIVETTA, LUCIA D'ANTONIO, MASSIMO ORSI, GIOVANNI |
author_sort |
ANTONINI P. |
title |
Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) |
title_short |
Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) |
title_full |
Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) |
title_fullStr |
Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) |
title_full_unstemmed |
Enriched mantle - Dupal signature in the genesis of the Jurassic Ferrar tholeiites from Prince Albert Mountains (Victoria Land, Antarctica) |
title_sort |
enriched mantle - dupal signature in the genesis of the jurassic ferrar tholeiites from prince albert mountains (victoria land, antarctica) |
publishDate |
1999 |
url |
http://hdl.handle.net/11588/137748 https://doi.org/10.1007/s004100050520 |
long_lat |
ENVELOPE(-69.895,-69.895,80.792,80.792) ENVELOPE(161.500,161.500,-76.000,-76.000) |
geographic |
Victoria Land Transantarctic Mountains Victoria Prince Albert Mountains |
geographic_facet |
Victoria Land Transantarctic Mountains Victoria Prince Albert Mountains |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000081850400001 volume:136 issue:1-2 firstpage:1 lastpage:19 numberofpages:19 journal:CONTRIBUTIONS TO MINERALOGY AND PETROLOGY http://hdl.handle.net/11588/137748 doi:10.1007/s004100050520 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0032727348 |
op_doi |
https://doi.org/10.1007/s004100050520 |
container_title |
Contributions to Mineralogy and Petrology |
container_volume |
136 |
container_issue |
1-2 |
container_start_page |
1 |
op_container_end_page |
19 |
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1809816860525330432 |