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Crustal influence in the generation of continental flood basaltsThe suggestion that primordial undifferentiated material may exist in the earth's mantle has recently been revived on the strength of Nd isotope data for two types of young continental rocks - flood basalts and kimberlites. The limited published data show a clustering of Nd isotopic compositions close to those for meteorites with chondritic relative rare-earth (REE) abundance. In contrast, data are presented for samples from the Columbia flood basalt province of the northwestern United States which show large isotopic variability suggestive of mixing processes acting after the separation of the primary magmas from their mantle source.
Document ID
19810035271
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Carlson, R. W.
(California Univ. La Jolla, CA, United States)
Lugmair, G. W.
(California Univ. La Jolla, CA, United States)
Macdougall, J. D.
(California, University La Jolla, Calif., United States)
Date Acquired
August 11, 2013
Publication Date
January 15, 1981
Publication Information
Publication: Nature
Volume: 289
Subject Category
Geophysics
Accession Number
81A19675
Funding Number(s)
CONTRACT_GRANT: NSF EAR-78-24060
CONTRACT_GRANT: NGL-05-009-150
Distribution Limits
Public
Copyright
Other

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