Boninite-like intraplate magmas from Manihiki Plateau require ultra-depleted and enriched source components

Roman Golowin, Maxim Portnyagin, Kaj Hoernle, Folkmar Hauff, Andrey Gurenko, Dieter Garbe-Schönberg, Reinhard Werner, Simon Turner

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The Ontong Java and Manihiki oceanic plateaus are believed to have formed through high-degree melting of a mantle plume head. Boninite-like, low-Ti basement rocks at Manihiki, however, imply a more complex magma genesis compared with Ontong Java basement lavas that can be generated by ~30% melting of a primitive mantle source. Here we show that the trace element and isotope compositions of low-Ti Manihiki rocks can best be explained by re-melting of an ultra-depleted source (possibly a common mantle component in the Ontong Java and Manihiki plume sources) re-enriched by ≤1% of an ocean-island-basalt-like melt component. Unlike boninites formed via hydrous flux melting of refractory mantle at subduction zones, these boninite-like intraplate rocks formed through adiabatic decompression melting of refractory plume material that has been metasomatized by ocean-island-basalt-like melts. Our results suggest that caution is required before assuming all Archaean boninites were formed in association with subduction processes.

LanguageEnglish
Article number14322
Pages1-10
Number of pages10
JournalNature Communications
Volume8
DOIs
Publication statusPublished - 9 Feb 2017

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Freezing
plateaus
Melting
melting
Earth mantle
plumes
Rocks
refractories
rocks
basements
Islands
Oceans and Seas
basalt
Refractory materials
oceans
pressure reduction
Trace Elements
Decompression
trace elements
Isotopes

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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Golowin, Roman ; Portnyagin, Maxim ; Hoernle, Kaj ; Hauff, Folkmar ; Gurenko, Andrey ; Garbe-Schönberg, Dieter ; Werner, Reinhard ; Turner, Simon. / Boninite-like intraplate magmas from Manihiki Plateau require ultra-depleted and enriched source components. In: Nature Communications. 2017 ; Vol. 8. pp. 1-10.
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abstract = "The Ontong Java and Manihiki oceanic plateaus are believed to have formed through high-degree melting of a mantle plume head. Boninite-like, low-Ti basement rocks at Manihiki, however, imply a more complex magma genesis compared with Ontong Java basement lavas that can be generated by ~30{\%} melting of a primitive mantle source. Here we show that the trace element and isotope compositions of low-Ti Manihiki rocks can best be explained by re-melting of an ultra-depleted source (possibly a common mantle component in the Ontong Java and Manihiki plume sources) re-enriched by ≤1{\%} of an ocean-island-basalt-like melt component. Unlike boninites formed via hydrous flux melting of refractory mantle at subduction zones, these boninite-like intraplate rocks formed through adiabatic decompression melting of refractory plume material that has been metasomatized by ocean-island-basalt-like melts. Our results suggest that caution is required before assuming all Archaean boninites were formed in association with subduction processes.",
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Golowin, R, Portnyagin, M, Hoernle, K, Hauff, F, Gurenko, A, Garbe-Schönberg, D, Werner, R & Turner, S 2017, 'Boninite-like intraplate magmas from Manihiki Plateau require ultra-depleted and enriched source components', Nature Communications, vol. 8, 14322, pp. 1-10. https://doi.org/10.1038/ncomms14322

Boninite-like intraplate magmas from Manihiki Plateau require ultra-depleted and enriched source components. / Golowin, Roman; Portnyagin, Maxim; Hoernle, Kaj; Hauff, Folkmar; Gurenko, Andrey; Garbe-Schönberg, Dieter; Werner, Reinhard; Turner, Simon.

In: Nature Communications, Vol. 8, 14322, 09.02.2017, p. 1-10.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Garbe-Schönberg, Dieter

AU - Werner, Reinhard

AU - Turner, Simon

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Golowin R, Portnyagin M, Hoernle K, Hauff F, Gurenko A, Garbe-Schönberg D et al. Boninite-like intraplate magmas from Manihiki Plateau require ultra-depleted and enriched source components. Nature Communications. 2017 Feb 9;8:1-10. 14322. https://doi.org/10.1038/ncomms14322