Marie Byrd Land lithospheric mantle: A review of the xenolith record
The Marie Byrd Land (MBL) lithospheric mantle xenolith record comprises over 100 samples from a range of localities spanning both major crustal terranes that comprise MBL: Ross and Amundsen provinces. Coarse granular to porphyroclastic in texture, the xenoliths are predominantly Type I spinel-bearin...
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ftunivcollcork:oai:cora.ucc.ie:10468/11418 2023-08-27T04:05:50+02:00 Marie Byrd Land lithospheric mantle: A review of the xenolith record Handler, Monica R. Wysoczanski, Richard J. Gamble, John A. 2021-02-01 application/pdf application/vnd.openxmlformats-officedocument.wordprocessingml.document application/vnd.openxmlformats-officedocument.spreadsheetml.sheet http://hdl.handle.net/10468/11418 https://doi.org/10.1144/M56-2020-17 en eng Geological Society of London https://doi.org/10.6084/m9.figshare.c.5309814 Handler, M. R., Wysoczanski, R. J. and Gamble, J. A. (2021) 'Marie Byrd Land lithospheric mantle: A review of the xenolith record', Geological Society, London, Memoirs, 56. doi:10.1144/M56-2020-17 doi:10.1144/M56-2020-17 0435-4052 Geological Society, London, Memoirs http://hdl.handle.net/10468/11418 56 © 2021, The Authors. Published by The Geological Society of London. All rights reserved. Marie Byrd Land MBL Lithospheric mantle xenolith record Article (peer-reviewed) 2021 ftunivcollcork https://doi.org/10.1144/M56-2020-1710.6084/m9.figshare.c.5309814 2023-08-06T14:30:57Z The Marie Byrd Land (MBL) lithospheric mantle xenolith record comprises over 100 samples from a range of localities spanning both major crustal terranes that comprise MBL: Ross and Amundsen provinces. Coarse granular to porphyroclastic in texture, the xenoliths are predominantly Type I spinel-bearing lherzolites to harburgites, but include rare dunite and pyroxenite examples. Garnet is absent and no hydrous phases, such as amphibole or mica, have been reported to date, although traces of apatite may be present. Characterisation of the lithospheric mantle composition and its evolution however, is hampered by patchy and uneven geochemical analyses across the xenolith suite. Nonetheless, a picture emerges of a heterogeneous lithosphere beneath both Ross and Amundsen Provinces. Previously published and new data reported here are consistent with samples ranging from variably cryptically metasomatised residua from variable (10 - 25%) degrees of partial melt extraction to refertilised compositions. Limited isotopic data point to a complex history, providing evidence for both ancient Proterozoic lithospheric mantle and preservation of Ordovician events. The Sr-Nd-Pb composition of the sampled lithospheric mantle overlaps the common low-µ isotopic endmember identified in Cenozoic magmatism from MBL and the wider West Antarctic Rift System. Article in Journal/Newspaper Antarc* Antarctic Marie Byrd Land University College Cork, Ireland: Cork Open Research Archive (CORA) Antarctic Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Geological Society, London, Memoirs M56-2020-17 |
institution |
Open Polar |
collection |
University College Cork, Ireland: Cork Open Research Archive (CORA) |
op_collection_id |
ftunivcollcork |
language |
English |
topic |
Marie Byrd Land MBL Lithospheric mantle xenolith record |
spellingShingle |
Marie Byrd Land MBL Lithospheric mantle xenolith record Handler, Monica R. Wysoczanski, Richard J. Gamble, John A. Marie Byrd Land lithospheric mantle: A review of the xenolith record |
topic_facet |
Marie Byrd Land MBL Lithospheric mantle xenolith record |
description |
The Marie Byrd Land (MBL) lithospheric mantle xenolith record comprises over 100 samples from a range of localities spanning both major crustal terranes that comprise MBL: Ross and Amundsen provinces. Coarse granular to porphyroclastic in texture, the xenoliths are predominantly Type I spinel-bearing lherzolites to harburgites, but include rare dunite and pyroxenite examples. Garnet is absent and no hydrous phases, such as amphibole or mica, have been reported to date, although traces of apatite may be present. Characterisation of the lithospheric mantle composition and its evolution however, is hampered by patchy and uneven geochemical analyses across the xenolith suite. Nonetheless, a picture emerges of a heterogeneous lithosphere beneath both Ross and Amundsen Provinces. Previously published and new data reported here are consistent with samples ranging from variably cryptically metasomatised residua from variable (10 - 25%) degrees of partial melt extraction to refertilised compositions. Limited isotopic data point to a complex history, providing evidence for both ancient Proterozoic lithospheric mantle and preservation of Ordovician events. The Sr-Nd-Pb composition of the sampled lithospheric mantle overlaps the common low-µ isotopic endmember identified in Cenozoic magmatism from MBL and the wider West Antarctic Rift System. |
format |
Article in Journal/Newspaper |
author |
Handler, Monica R. Wysoczanski, Richard J. Gamble, John A. |
author_facet |
Handler, Monica R. Wysoczanski, Richard J. Gamble, John A. |
author_sort |
Handler, Monica R. |
title |
Marie Byrd Land lithospheric mantle: A review of the xenolith record |
title_short |
Marie Byrd Land lithospheric mantle: A review of the xenolith record |
title_full |
Marie Byrd Land lithospheric mantle: A review of the xenolith record |
title_fullStr |
Marie Byrd Land lithospheric mantle: A review of the xenolith record |
title_full_unstemmed |
Marie Byrd Land lithospheric mantle: A review of the xenolith record |
title_sort |
marie byrd land lithospheric mantle: a review of the xenolith record |
publisher |
Geological Society of London |
publishDate |
2021 |
url |
http://hdl.handle.net/10468/11418 https://doi.org/10.1144/M56-2020-17 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) |
geographic |
Antarctic Byrd Marie Byrd Land |
geographic_facet |
Antarctic Byrd Marie Byrd Land |
genre |
Antarc* Antarctic Marie Byrd Land |
genre_facet |
Antarc* Antarctic Marie Byrd Land |
op_relation |
https://doi.org/10.6084/m9.figshare.c.5309814 Handler, M. R., Wysoczanski, R. J. and Gamble, J. A. (2021) 'Marie Byrd Land lithospheric mantle: A review of the xenolith record', Geological Society, London, Memoirs, 56. doi:10.1144/M56-2020-17 doi:10.1144/M56-2020-17 0435-4052 Geological Society, London, Memoirs http://hdl.handle.net/10468/11418 56 |
op_rights |
© 2021, The Authors. Published by The Geological Society of London. All rights reserved. |
op_doi |
https://doi.org/10.1144/M56-2020-1710.6084/m9.figshare.c.5309814 |
container_title |
Geological Society, London, Memoirs |
container_start_page |
M56-2020-17 |
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1775346539624923136 |