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Upper Cenozoic basalts with high Sr-87/Sr-86 and Sr/Rb ratios, southern Great Basin, western United States.The initial strontium isotopic composition of 15 mafic volcanic rocks from the southern Great Basin has been determined. Results indicate that the basalts must have been derived from unusual mantle material in which an originally high Rb/Sr ratio was markedly lowered during an earlier phase of magmatic activity.
Document ID
19720032377
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hedge, C. E. (U.S. Geological Survey, Federal Center Denver, Colo., United States)
Noble, D. C.
Date Acquired
August 6, 2013
Publication Date
December 1, 1971
Publication Information
Publication: Geological Society of America Bulletin
Volume: 82
Subject Category
Geophysics
Accession Number
72A16043
Funding Number(s)
CONTRACT_GRANT: NSF GA-1546
CONTRACT_GRANT: NGR-22-007-103
Distribution Limits
Public
Copyright
Other

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