Isotope evidence of a mantle convection boundary at the Australian-Antarctic Discordance

Basalts from the Southeast Indian Ridge south of Australia form two geographically and isotopically distinct groups that show affinities with either Indian Ocean or Pacific/Atlantic Ocean isotope compositions. The possibility that there is a sharp boundary between the Pacific and Indian Ocean isotop...

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Bibliographic Details
Published in:	Nature (London) Vol. 333; no. 6174; pp. 623 - 629
Main Authors:	Klein, E. M, Langmuir, C. H, Zindler, A, Staudigel, H, Hamelin, B
Format:	Journal Article
Language:	English
Published:	London Nature Publishing 16-06-1988 Nature Publishing Group
Subjects:	Basalt Earth sciences Earth, ocean, space Exact sciences and technology Geology Isotope geochemistry Isotope geochemistry. Geochronology Marine geology Oceanography Pacific Ocean Indian Ocean Australia United States > US Atlantic Ocean Indian Ocean Nd-144/Nd-143 Igneous rocks Volcanic rocks Convection Pb-208/Pb-204 Pb-206/Pb-204 Pacific Ocean Pb-207/Pb-204 Mantle Basalts Isotopes Sr-87/Sr-86
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Summary:	Basalts from the Southeast Indian Ridge south of Australia form two geographically and isotopically distinct groups that show affinities with either Indian Ocean or Pacific/Atlantic Ocean isotope compositions. The possibility that there is a sharp boundary between the Pacific and Indian Ocean isotope provinces is discussed.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0028-0836 1476-4687
DOI:	10.1038/333623a0