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Lu-Hf AND Sm-Nd EVOLUTION IN LUNAR MARE BASALTS.

Journal of Geophysical Research

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Abstract

Lu-Hf and Sm-Nd data for mare basalts combined with Rb-Sr and total REE data taken from the literature suggest that the mare basalts were derived by small ( less than equivalent to 10%) degrees of partial melting of cumulate sources, but that the magma ocean from which these sources formed was light REE and hf-enriched. Calculated source compositions range from lherzolite to olivine websterite. Nonmodal melting of small amounts of ilmenite ( less than equivalent to 3%) in the sources seems to be required by the Lu/Hf data. A comparison of the Hf and Nd isotopic characteristics between the mare basalts and terrestrial oceanic basalts reveals that the epsilon Hf/ epsilon Nd ratios in low-Ti mare basalts are much higher than in terrestrial ocean basalts.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Lu-Hf AND Sm-Nd EVOLUTION IN LUNAR MARE BASALTS.
Series title:
Journal of Geophysical Research
ISBN:
0875902332
Volume
89 Suppl
Year Published:
1984
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Geophysical Research
First page:
459
Last page:
477
Conference Title:
Proc of the 14th Lunar and Planet Sci Conf
Conference Location:
Houston, TX, USA
Conference Date:
14 March 1984 through 15 March 1984