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Partial melting of the Allende (CV3) meteorite - Implications for origins of basaltic meteoritesEucrites and angrites are distinct types of basaltic meteorites whose origins are poorly known. Experiments in which samples of the Allende (CV3) carbonaceous chondrite were partially melted indicate that partial melts can resemble either eucrites or angrites, depending only on the oxygen fugacity. Melts are eucritic if this variable is below that of the iron-wuestite buffer or angritic if above it. With changing pressure, the graphite-oxygen redox reaction can produce oxygen fugacities that are above or below those of the iron-wuestite buffer. Therefore, a single, homogeneous, carbonaceous planetoid greater than 110 kilometers in radius could produce melts of drastically different composition, depending on the depth of melting.
Document ID
19910051825
Document Type
Reprint (Version printed in journal)
Authors
Jurewicz, A. J. G.
(Lockheed Engineering and Sciences Co. Houston, TX, United States)
Mittlefehldt, D. W.
(Lockheed Engineering and Sciences Co. Houston, TX, United States)
Jones, J. H.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
May 3, 1991
Publication Information
Publication: Science
Volume: 252
ISSN: 0036-8075
Subject Category
Lunar And Planetary Exploration
Accession Number
91A36448
Distribution Limits
Public
Copyright
Other

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