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

Origin of continental components in Indian Ocean basalts: evidence from Elan Bank (Kerguelen Plateau, ODP Leg 183, Site 1137)
Origin of continental components in Indian Ocean basalts: evidence from Elan Bank (Kerguelen Plateau, ODP Leg 183, Site 1137)
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.
Indian Ocean, Kerguelen plume, continental contamination, large igneous province, Kerguelen Plateau
0091-7613
147-150
Weis, D.
30256df6-17e4-4aca-9797-c9149c55b7ae
Ingle, S.
cc5b2bf8-9c40-44d6-8bbb-77fa020d0271
Damasceno, D.
c60cb54b-d9ca-424a-a8a7-d48733af485f
Frey, F.A.
e0083183-8374-4b03-b145-2ff3b27fa802
Nicolaysen, K.
1182774f-518f-4c62-af79-69f0b3717840
Barling, J.
35b99143-2b50-460f-911f-8213f160dcd2
Coffin, M.F.
b8285650-5efd-4129-ae91-1cf3f5911e89
Weis, D.
30256df6-17e4-4aca-9797-c9149c55b7ae
Ingle, S.
cc5b2bf8-9c40-44d6-8bbb-77fa020d0271
Damasceno, D.
c60cb54b-d9ca-424a-a8a7-d48733af485f
Frey, F.A.
e0083183-8374-4b03-b145-2ff3b27fa802
Nicolaysen, K.
1182774f-518f-4c62-af79-69f0b3717840
Barling, J.
35b99143-2b50-460f-911f-8213f160dcd2
Coffin, M.F.
b8285650-5efd-4129-ae91-1cf3f5911e89

Weis, D., Ingle, S., Damasceno, D., Frey, F.A., Nicolaysen, K., Barling, J. and 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. (doi:10.1130/0091-7613(2001)029<0147:OOCCII>2.0.CO;2).

Record type: Article

Abstract

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.

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More information

Published date: February 2001
Keywords: Indian Ocean, Kerguelen plume, continental contamination, large igneous province, Kerguelen Plateau

Identifiers

Local EPrints ID: 52439
URI: http://eprints.soton.ac.uk/id/eprint/52439
ISSN: 0091-7613
PURE UUID: 8ae206e2-cd93-46f0-9821-f4d44042caa5

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Date deposited: 26 Jun 2008
Last modified: 15 Mar 2024 10:37

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Contributors

Author: D. Weis
Author: S. Ingle
Author: D. Damasceno
Author: F.A. Frey
Author: K. Nicolaysen
Author: J. Barling
Author: M.F. Coffin

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