Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre
The lithospheric mantle beneath West Antarctica has been characterized using petrology, whole-rock and mineral major element geochemistry, whole-rock trace element chemistry and Mössbauer spectroscopy data obtained on a suite of peridotite (lherzolite and harzburgite) and pyroxenite xenoliths from t...
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Online Access: | https://hdl.handle.net/10289/11423 https://doi.org/10.1093/petrology/egu075 |
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ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/11423 2023-10-09T21:45:52+02:00 Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre Martin, Adam P. Price, Richard C. Cooper, Alan F. McCammon, Catherine A. 2015 application/pdf https://hdl.handle.net/10289/11423 https://doi.org/10.1093/petrology/egu075 en eng Oxford University Press Journal of Petrology Martin, A. P., Price, R. C., Cooper, A. F., & McCammon, C. A. (2015). Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre. Journal of Petrology, 56(1), 193–226. https://doi.org/10.1093/petrology/egu075 0022-3530 https://hdl.handle.net/10289/11423 doi:10.1093/petrology/egu075 1460-2415 © The Author 2015. Published by Oxford University Press. Science & Technology Physical Sciences Geochemistry & Geophysics lithospheric mantle oxygen fugacity pyroxenite spinel peridotite eclogite OROGENIC LHERZOLITE MASSIFS SPINEL OXYGEN GEOBAROMETER TRACE-ELEMENT COMPOSITIONS MARIE-BYRD-LAND NEW-ZEALAND FERRIC IRON CONTINENTAL-CRUST INTRAPLATE VOLCANISM MELT/ROCK REACTION RONDA PERIDOTITE Journal Article 2015 ftunivwaikato https://doi.org/10.1093/petrology/egu075 2023-09-19T17:24:01Z The lithospheric mantle beneath West Antarctica has been characterized using petrology, whole-rock and mineral major element geochemistry, whole-rock trace element chemistry and Mössbauer spectroscopy data obtained on a suite of peridotite (lherzolite and harzburgite) and pyroxenite xenoliths from the Mount Morning eruptive centre, Southern Victoria Land. The timing of pyroxenite formation in Victoria Land overlaps with subduction of the Palaeo-Pacific plate beneath the Gondwana margin and pyroxenite is likely to have formed when fluids derived from, or modified by, melting of the subducting, eclogitic, oceanic crustal plate percolated through peridotite of the lithospheric mantle. Subsequent melting of lithospheric pyroxenite veins similar to those represented in the Mount Morning xenolith suite has contributed to the enriched trace element (and isotope) signatures seen in Cenozoic volcanic rocks from Mount Morning, elsewhere in Victoria Land and Zealandia. In general, the harzburgite xenoliths reflect between 20 and 30% melt depletion. Their depleted element budgets are consistent with Archaean cratonization ages and they have mantle-normalized trace element patterns comparable with typical subcontinental lithospheric mantle. The spinel lherzolite mineral data suggest a similar amount of depletion to that recorded in the harzburgites (20–30%), whereas plagioclase lherzolite mineral data suggest <15% melt depletion. The lherzolite (spinel and plagioclase) xenolith whole-rocks have compositions indicating <20% melt depletion, consistent with Proterozoic to Phanerozoic cratonization ages, and have mantle-normalized trace element patterns comparable with typical depleted mid-ocean ridge mantle. All peridotite xenoliths have undergone a number of melt–rock reaction events. Melting took place mainly in the spinel peridotite stability field, but one plagioclase peridotite group containing high-sodium clinopyroxenes is best modelled by melting in the garnet field. Median oxygen fugacity estimates based on ... Article in Journal/Newspaper Antarc* Antarctica Marie Byrd Land Victoria Land West Antarctica The University of Waikato: Research Commons Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Mount Morning ENVELOPE(163.750,163.750,-78.450,-78.450) New Zealand Pacific Victoria Land West Antarctica Journal of Petrology 56 1 193 226 |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
Science & Technology Physical Sciences Geochemistry & Geophysics lithospheric mantle oxygen fugacity pyroxenite spinel peridotite eclogite OROGENIC LHERZOLITE MASSIFS SPINEL OXYGEN GEOBAROMETER TRACE-ELEMENT COMPOSITIONS MARIE-BYRD-LAND NEW-ZEALAND FERRIC IRON CONTINENTAL-CRUST INTRAPLATE VOLCANISM MELT/ROCK REACTION RONDA PERIDOTITE |
spellingShingle |
Science & Technology Physical Sciences Geochemistry & Geophysics lithospheric mantle oxygen fugacity pyroxenite spinel peridotite eclogite OROGENIC LHERZOLITE MASSIFS SPINEL OXYGEN GEOBAROMETER TRACE-ELEMENT COMPOSITIONS MARIE-BYRD-LAND NEW-ZEALAND FERRIC IRON CONTINENTAL-CRUST INTRAPLATE VOLCANISM MELT/ROCK REACTION RONDA PERIDOTITE Martin, Adam P. Price, Richard C. Cooper, Alan F. McCammon, Catherine A. Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre |
topic_facet |
Science & Technology Physical Sciences Geochemistry & Geophysics lithospheric mantle oxygen fugacity pyroxenite spinel peridotite eclogite OROGENIC LHERZOLITE MASSIFS SPINEL OXYGEN GEOBAROMETER TRACE-ELEMENT COMPOSITIONS MARIE-BYRD-LAND NEW-ZEALAND FERRIC IRON CONTINENTAL-CRUST INTRAPLATE VOLCANISM MELT/ROCK REACTION RONDA PERIDOTITE |
description |
The lithospheric mantle beneath West Antarctica has been characterized using petrology, whole-rock and mineral major element geochemistry, whole-rock trace element chemistry and Mössbauer spectroscopy data obtained on a suite of peridotite (lherzolite and harzburgite) and pyroxenite xenoliths from the Mount Morning eruptive centre, Southern Victoria Land. The timing of pyroxenite formation in Victoria Land overlaps with subduction of the Palaeo-Pacific plate beneath the Gondwana margin and pyroxenite is likely to have formed when fluids derived from, or modified by, melting of the subducting, eclogitic, oceanic crustal plate percolated through peridotite of the lithospheric mantle. Subsequent melting of lithospheric pyroxenite veins similar to those represented in the Mount Morning xenolith suite has contributed to the enriched trace element (and isotope) signatures seen in Cenozoic volcanic rocks from Mount Morning, elsewhere in Victoria Land and Zealandia. In general, the harzburgite xenoliths reflect between 20 and 30% melt depletion. Their depleted element budgets are consistent with Archaean cratonization ages and they have mantle-normalized trace element patterns comparable with typical subcontinental lithospheric mantle. The spinel lherzolite mineral data suggest a similar amount of depletion to that recorded in the harzburgites (20–30%), whereas plagioclase lherzolite mineral data suggest <15% melt depletion. The lherzolite (spinel and plagioclase) xenolith whole-rocks have compositions indicating <20% melt depletion, consistent with Proterozoic to Phanerozoic cratonization ages, and have mantle-normalized trace element patterns comparable with typical depleted mid-ocean ridge mantle. All peridotite xenoliths have undergone a number of melt–rock reaction events. Melting took place mainly in the spinel peridotite stability field, but one plagioclase peridotite group containing high-sodium clinopyroxenes is best modelled by melting in the garnet field. Median oxygen fugacity estimates based on ... |
format |
Article in Journal/Newspaper |
author |
Martin, Adam P. Price, Richard C. Cooper, Alan F. McCammon, Catherine A. |
author_facet |
Martin, Adam P. Price, Richard C. Cooper, Alan F. McCammon, Catherine A. |
author_sort |
Martin, Adam P. |
title |
Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre |
title_short |
Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre |
title_full |
Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre |
title_fullStr |
Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre |
title_full_unstemmed |
Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre |
title_sort |
petrogenesis of the rifted southern victoria land lithospheric mantle, antarctica, inferred from petrography, geochemistry, thermobarometry and oxybarometry of peridotite and pyroxenite xenoliths from the mount morning eruptive centre |
publisher |
Oxford University Press |
publishDate |
2015 |
url |
https://hdl.handle.net/10289/11423 https://doi.org/10.1093/petrology/egu075 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(163.750,163.750,-78.450,-78.450) |
geographic |
Byrd Marie Byrd Land Mount Morning New Zealand Pacific Victoria Land West Antarctica |
geographic_facet |
Byrd Marie Byrd Land Mount Morning New Zealand Pacific Victoria Land West Antarctica |
genre |
Antarc* Antarctica Marie Byrd Land Victoria Land West Antarctica |
genre_facet |
Antarc* Antarctica Marie Byrd Land Victoria Land West Antarctica |
op_relation |
Journal of Petrology Martin, A. P., Price, R. C., Cooper, A. F., & McCammon, C. A. (2015). Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre. Journal of Petrology, 56(1), 193–226. https://doi.org/10.1093/petrology/egu075 0022-3530 https://hdl.handle.net/10289/11423 doi:10.1093/petrology/egu075 1460-2415 |
op_rights |
© The Author 2015. Published by Oxford University Press. |
op_doi |
https://doi.org/10.1093/petrology/egu075 |
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Journal of Petrology |
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56 |
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1779321528669700096 |