On the composition of ocean island basalts (OIB): The effects of lithospheric thickness variation and mantle metasomatism

On the composition of ocean island basalts (OIB): The effects of lithospheric thickness variation and mantle metasomatism

We have examined island-averaged geochemical data for 115 volcanic islands with known eruption ages and ages of the underlain lithosphere from the Pacific, Atlantic and Indian Oceans. These age data allow calculation of the lithosphere thickness at the time of volcanism. After correcting the basalts...

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Veröffentlicht in:Lithos 2009-09, Vol.112 (1-2), p.118-136
Hauptverfasser: Humphreys, Emma R., Niu, Yaoling
Format: Artikel
Sprache:eng
Schlagworte:
Intra-plate magmatism
Lithospheric thickness control
Mantle metasomatism
Marine
Ocean islands
OIB compositions
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Beschreibung
Zusammenfassung:We have examined island-averaged geochemical data for 115 volcanic islands with known eruption ages and ages of the underlain lithosphere from the Pacific, Atlantic and Indian Oceans. These age data allow calculation of the lithosphere thickness at the time of volcanism. After correcting the basalts (including alkalic types) (
ISSN:0024-4937
1872-6143
DOI:10.1016/j.lithos.2009.04.038