Fertile components of the NE Atlantic mantle - Minor elements and O-isotopes in olivine phenocrysts

Primitive off-rift basalts in Iceland and Jan Mayen sample subcontinental lithospheric mantle (SCLM) in addition to the Iceland plume with recycled oceanic crust (ROC) and meltdepleted or primitive lower mantle material [1]. The SCLM/ROC-ratios are high at Jan Mayen (high La/Sm and ^(87)/^(86)Sr and...

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Bibliographic Details
Published in:Geochimica et Cosmochimica Acta
Main Authors: Trønnes, R. G., Erambert, M., Eiler, J. M., Debaille, V.
Format: Article in Journal/Newspaper
Language:unknown
Published: Elsevier 2010
Subjects:
Arctic
Jan Mayen
Jan Mayen Ridge
Surtsey
Iceland
Online Access:https://authors.library.caltech.edu/39773/
https://resolver.caltech.edu/CaltechAUTHORS:20130806-091404815
Description
Summary:Primitive off-rift basalts in Iceland and Jan Mayen sample subcontinental lithospheric mantle (SCLM) in addition to the Iceland plume with recycled oceanic crust (ROC) and meltdepleted or primitive lower mantle material [1]. The SCLM/ROC-ratios are high at Jan Mayen (high La/Sm and ^(87)/^(86)Sr and low ^(206)/^(204)Pb, ^(187)/^(188)Os and ^(143)/^(144)Nd), intermediate in the Snæfellsnes Flank Zone and low in the Southern Flank Zone, including Surtsey. The fertile components are also present in tholeiites in the Icelandic rift zones and the NE Atlantic and Arctic ridges, despite larger proportions of melts from refractory asthenosphere. The SCLM/ROC-ratios are high where the distances to the nearest continental margin or the continental Jan Mayen Ridge are relatively short.

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