Bilateral geochemical asymmetry in the Karoo large igneous province

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dc.contributor.author Luttinen, Arto V.
dc.date.accessioned 2018-04-12T12:17:01Z
dc.date.available 2018-04-12T12:17:01Z
dc.date.issued 2018-03-27
dc.identifier.citation Luttinen , A V 2018 , ' Bilateral geochemical asymmetry in the Karoo large igneous province ' , Scientific Reports , vol. 8 , no. 8 , 5223 . https://doi.org/10.1038/s41598-018-23661-3
dc.identifier.other PURE: 102850868
dc.identifier.other PURE UUID: 11aa0e8d-6d47-4154-8ba5-2957dd86504a
dc.identifier.other WOS: 000428366700003
dc.identifier.other Scopus: 85044572088
dc.identifier.other ORCID: /0000-0002-3129-0392/work/43736402
dc.identifier.uri http://hdl.handle.net/10138/234192
dc.description.abstract In the Karoo large igneous province, the geochemical assessment of mantle source variability and structure is hampered by probable crustal contamination overprinting of compositionally diverse flood basalts. Mantle source characteristics have been defined only for exceptional, primitive rock types. Here I use a compiled dataset for over 800 samples to demonstrate that the abundance of Nb relative to Zr, Ti, and Y provides a useful geochemical tracer of mantle sources for variably contaminated rock types of the Karoo province. Variations in the relative abundance of Nb reveal emplacement of distinctive, Nb-undepleted and Nb-depleted magmas in the North Karoo and South Karoo sub-provinces, respectively, and clarify correlation between flood basalts and previously proposed mantle source components. Judging from plate tectonic reconstructions and the compositions of plausible mantle source components, the geochemical bilateral asymmetry in Karoo may reflect tapping of contrasting plume and upper mantle reservoirs in the two sub-provinces. en
dc.format.extent 11
dc.language.iso eng
dc.relation.ispartof Scientific Reports
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1171 Geosciences
dc.subject DRONNING MAUD LAND
dc.subject CONTINENTAL FLOOD BASALTS
dc.subject TRACE-ELEMENT COMPOSITION
dc.subject CORE-MANTLE BOUNDARY
dc.subject SOUTH-AFRICA
dc.subject GONDWANA BREAKUP
dc.subject PICRITE BASALTS
dc.subject OCEANIC-CRUST
dc.subject DEEP-MANTLE
dc.subject MAGMA TYPES
dc.title Bilateral geochemical asymmetry in the Karoo large igneous province en
dc.type Article
dc.contributor.organization Natural Sciences Unit
dc.contributor.organization Finnish Museum of Natural History
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1038/s41598-018-23661-3
dc.relation.issn 2045-2322
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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