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Chemical differences between small subsamples of Apollo 15 olivine-normative basaltsResults are presented on the chemical and petrological characterization of nine samples of an Apollo 15 mare basalt suite. The results show that all nine samples are low-silica olivine normative basalts (ONBs) similar to those described earlier for low-silica ONBs from Apollo 15 site. The samples were found to vary in texture and grain size, from fine-grained intergranular or subophitic basalts to coarse-grained granular 'microgabbros'. Several displayed macroscopic heterogeneity. Variation diagrams show that the overall trend of the data is consistent with the fractionation of olivine (plus minor Cr-spinel) from a high-MgO parent magma.
Document ID
19900046410
Document Type
Conference Paper
Authors
Shervais, J. W. (South Carolina Univ. Columbia, SC, United States)
Vetter, S. K. (South Carolina, University Columbia, United States)
Lindstrom, M. M. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
LUNAR AND PLANETARY EXPLORATION
Meeting Information
Lunar and Planetary Science Conference(Houston, TX)
Funding Number(s)
CONTRACT_GRANT: NAG9-169
Distribution Limits
Public
Copyright
Other