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Very low Ti /VLT/ basalts - A new mare rock type from the Apollo 17 drill corePhaneritic fragments, vitrophyres, and glass beads of a new very low Ti (VLT) mare basalt are found in the Apollo 17 drill core. VLT lithic fragments are characterized by TiO2 content of approximately 0.5%, Mg/(Mg + Fe) of approximately 0.52, CaO/Al2O3 of approximately 0.9, and low alkali content. Although mineral systematics and modal composition of VLT basalt are similar to Apollo 12 and 15 low Ti basalts, VLT basalts cannot be related to these mare basalts by crystal fractionation. Since VLT basalt is isochemical with some of the less mafic green glasses, fractionation of VLT magma from a liquid of green-glass composition is a possibility. Spectral reflectance studies suggest that VLT-type basalts may be relatively common in mare basins.
Document ID
19780057736
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Vaniman, D. T.
(State Univ. of New York Stony Brook, NY, United States)
Papike, J. J.
(New York, State University Stony Brook, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 14, 1977
End Date: March 18, 1977
Accession Number
78A41645
Funding Number(s)
CONTRACT_GRANT: NSG-9044
Distribution Limits
Public
Copyright
Other

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