Other
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990metic..25..249r&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 25, Dec. 1990, p. 249-258.
Other
7
Basalt, Core Sampling, Lunar Maria, Lunar Rocks, Petrology, Apollo 17 Flight, Crystallization, Grain Size, Magma, Titanium
Scientific paper
A fragment of basalt picked from the drive tube collected at Van Serg crater at the Apollo 17 landing site has a bulk chemistry more primitive than that of other high-titanium mare basalt groups collected at the site. The sample has a fine-grained olivine phyric, subophitic texture that is distinct from that of other high-titanium basalt samples. The grain size and texture suggest that the sample has a composition close to that of a magma. The crystallization sequence, with appearance of oxide minerals later than in other groups, and other petrographic features such as more-calcic plagioclase and early pigeonite rather than augite, are consistent with this sample representing a distinct variant of Apollo 17 high-titanium basalts. It is not related through closed-system igneous processes to any of the other mare basalt groups identified among Apollo 17 samples. Its characters emphasize the complexity of contemporaneous magma processes on the moon and the heterogeneity of that part of the mantle that was melted.
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