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Partition coefficients of Hf, Zr, and REE between phenocrysts and groundmassesPartition coefficients of Hf, Zr, and REE between olivine, orthopyroxene, clinopyroxene, plagioclase, garnet, amphibole, ilmenite, phlogopite, and liquid are presented. Samples consist of megacrysts in kimberlite, phenocrysts in alkaline basalts, tholeiitic basalts and andesitic to dacitic rocks, and synthetic garnet and clinopyroxene in Hawaiian tholeiites. The Hf-Lu and Zr-Lu elemental fractionations are as large as the Lu-Sm or Lu-Nd fractionation. The Hf and Zr partition coefficients between mafic phenocrysts and liquids are smaller than the Lu partition coefficients, but are similar to the Nd or Sm partition coefficients. The Hf and Zr partition coefficients between ilmenite, phlogopite, and liquid are larger than the Lu partition coefficients for these minerals and their corresponding liquids. The Hf-Zr elemental fractionation does not occur except for extreme fractionation involving Zr-minerals and extremely low fO2. These data have an important bearing on chronological and petrogenetic tracer studies involving the Lu-Hf isotopic system.
Document ID
19840043316
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fujimaki, H.
(U.S. Geological Survey, Denver; Colorado School of Mines, Golden CO, United States)
Tatsumoto, M.
(U.S. Geological Survey Denver, CO, United States)
Aoki, K.-I.
(Tohoku University Sendai, Japan)
Date Acquired
August 12, 2013
Publication Date
February 15, 1984
Publication Information
Publication: Journal of Geophysical Research, Supplement
Volume: 89
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
84A26103
Funding Number(s)
CONTRACT_GRANT: NASA ORDER T-783-H
Distribution Limits
Public
Copyright
Other

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