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Rare earth element abundances in rocks and minerals from the Fiskenaesset Complex, West GreenlandThe paper reports activation-analysis determinations of rare-earth-element (REE) and other trace-element concentrations in selected rocks, plagioclase, and mafic separates from the Fiskenaesset Complex. The REE abundances are found to be very low and atypical in comparison with other terrestrial anorthosites. The plagioclases are shown to be characterized by a deficiency in heavy RE elements relative to light ones and a positive Eu anomaly, while the mafic separates are enriched in heavy rare earths and have no Eu anomaly, except in one sample. It is found that the bulk and trace-element abundances of the plagioclases are similar to those observed in some lunar anorthosites, but the degree of Eu anomaly is less in the plagioclases. The data are taken as confirmation of the idea that fractionation processes were involved in the origin of the Complex, and it is concluded that the Complex may have been produced from a magma generated by partial melting of a garnet-bearing source.
Document ID
19760087381
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Henderson, P.
Fishlock, S. J.
(Chelsea College London, United Kingdom)
Laul, J. C.
Cooper, T. D.
Conard, R. L.
Boynton, W. V.
Schmitt, R. A.
(Oregon State University Corvallis, Ore., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1976
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 30
Issue: 1, Ap
Subject Category
Geophysics
Accession Number
76A28211
Funding Number(s)
CONTRACT_GRANT: NERC-35/3401
CONTRACT_GRANT: NGR-38-002-039
CONTRACT_GRANT: NGR-38-002-020
Distribution Limits
Public
Copyright
Other

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