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Origin of continental components in Indian Ocean basalts: evidence from Elan Bank (Kerguelen Plateau, ODP Leg 183, Site 1137)
journal contribution
posted on 2023-05-17, 08:46 authored by Weis, D, Ingle, S, Damasceno, D, Frey, FA, Nicolaysen, K, Barling, J, Mike CoffinMike CoffinBasalts 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.
History
Publication title
Geology (Boulder)Volume
29Pagination
147-150ISSN
0091-7613Department/School
Institute for Marine and Antarctic StudiesPublisher
Geological Soc AmericaPlace of publication
Inc, Po Box 9140, Boulder, USA, Co, 80301-9140Rights statement
Copyright © 2001 Geological Society of AmericaRepository Status
- Restricted