Very low-Ti mare basalts

Details Very low-Ti mare basalts Very low-Ti mare basalts

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977georl...4..207t&link_type=abstract

Geophysical Research Letters, vol. 4, June 1977, p. 207-210.

Physics

6

Apollo 17 Flight, Basalt, Core Sampling, Lunar Composition, Lunar Maria, Chemical Composition, Glass, Microstructure, Mineralogy, Petrology

Scientific paper

Bulk compositions, petrology, and mineralogy of lithic fragments discovered in polished sections of Apollo 17 drill core samples 70007, 70008, and 70009 and Luna 24 soil 24077, 43 are described. The fragments have unambiguous affinities to mare basalts, but are exceptionally low in TiO2 (less than 1.0 wt.% TiO2). Apollo 17 rake sample 78526 is a green glassy rock of similar composition. Together the samples represent a distinct variety of mare basalts. Bulk compositional relationships suggest that they are related to Apollo 15 green glass, but the data do not permit one to discern the precise nature of the relationship. Both fractional crystallization and partial melting models can explain the observed compositional trends.

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