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Origin of continental components in Indian Ocean basalts: evidence from Elan Bank (Kerguelen Plateau, ODP Leg 183, Site 1137)

Weis, D.; Ingle, S.; Damasceno, D.; Frey, F.A.; Nicolaysen, K.; Barling, J.; Coffin, M.F.. 2001 Origin of continental components in Indian Ocean basalts: evidence from Elan Bank (Kerguelen Plateau, ODP Leg 183, Site 1137). Geology, 29 (2). 147-150. 10.1130/0091-7613(2001)029<0147:OOCCII>2.0.CO;2

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Abstract/Summary

Basalts forming the floor of the Indian Ocean are geochemically distinct from those of the Atlantic and Pacific Oceans. These differences have been attributed to a deeply recycled continental component or to widespread dispersion of plume-type mantle within the Indian Ocean asthenosphere. The discovery of Proterozoic continental crustal rocks within the uppermost basaltic basement of Elan Bank, part of the Kerguelen Plateau, shows instead that direct shallow-level contamination of basaltic magmas by isolated continental crust fragments may have produced the anomalous isotopic ratios of some Indian Ocean basalts.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1130/0091-7613(2001)029<0147:OOCCII>2.0.CO;2
ISSN: 0091-7613
Additional Keywords: Indian Ocean, Kerguelen plume, continental contamination, large igneous province, Kerguelen Plateau
Date made live: 26 Jun 2008 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/152439

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