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Ilmenite-orthopyroxene intergrowths from the moon and the Skaergaard intrusionMyrmekitic or eutectic-like intergrowths of ilmenite and orthopyroxene, which texturally resemble intergrowths from nodules in kimberlites have been observed in lunar breccia 60016,92 and in 'Lower Zone' a of the Skaergaard intrusion. The lunar sample is similar in mineral chemistry to kimberlife occurrences, while the Skaergaard sample is not as Mg-rich. In all cases, however, there is a systematic distribution of Mg between orthopyroxene and ilmenite. The similar textures were formed by different processes: the lunar intergrowth is probably a eutectic-type texture resulting from crystallization of a melt, while the Skaergaard intergrowth formed by a process of sub-solidus oxidation.
Document ID
19750056054
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Haselton, J. D.
Nash, W. P.
(Utah, University Salt Lake City, Utah, United States)
Date Acquired
August 8, 2013
Publication Date
July 1, 1975
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 26
Issue: 3, Ju
Subject Category
Lunar And Planetary Exploration
Accession Number
75A40126
Funding Number(s)
CONTRACT_GRANT: NSG-9024
CONTRACT_GRANT: NGR-45-003-090
Distribution Limits
Public
Copyright
Other

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