Marie Byrd Land lithospheric mantle: A review of the xenolith record

Handler, Monica R.; Wysoczanski, Richard J.; Gamble, John A.

Access to this article is restricted until 12 months after publication by request of the publisher.. Restriction lift date: 2022-02-01

Marie Byrd Land lithospheric mantle: A review of the xenolith record

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dc.check.date	2022-02-01
dc.check.info	Access to this article is restricted until 12 months after publication by request of the publisher.	en
dc.contributor.author	Handler, Monica R.
dc.contributor.author	Wysoczanski, Richard J.
dc.contributor.author	Gamble, John A.
dc.date.accessioned	2021-06-01T09:59:23Z
dc.date.available	2021-06-01T09:59:23Z
dc.date.issued	2021-02-01
dc.date.updated	2021-06-01T09:45:17Z
dc.description.abstract	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-Âµ isotopic endmember identified in Cenozoic magmatism from MBL and the wider West Antarctic Rift System.	en
dc.description.status	Peer reviewed	en
dc.description.version	Accepted Version	en
dc.format.mimetype	application/pdf	en
dc.identifier.citation	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	en
dc.identifier.doi	10.1144/M56-2020-17	en
dc.identifier.issn	0435-4052
dc.identifier.journaltitle	Geological Society, London, Memoirs	en
dc.identifier.uri	https://hdl.handle.net/10468/11418
dc.identifier.volume	56	en
dc.language.iso	en	en
dc.publisher	Geological Society of London	en
dc.relation.uri	https://doi.org/10.6084/m9.figshare.c.5309814
dc.rights	© 2021, The Authors. Published by The Geological Society of London. All rights reserved.	en
dc.subject	Marie Byrd Land	en
dc.subject	MBL	en
dc.subject	Lithospheric mantle xenolith record	en
dc.title	Marie Byrd Land lithospheric mantle: A review of the xenolith record	en
dc.type	Article (peer-reviewed)	en