Ferrobasalts from Mare Crisium - Luna 24

Details Ferrobasalts from Mare Crisium - Luna 24 Ferrobasalts from Mare Crisium - Luna 24

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977georl...4..497v&link_type=abstract

Geophysical Research Letters, vol. 4, Oct. 1977, p. 497-500.

Physics

3

Basalt, Lunar Maria, Lunar Rocks, Iron Compounds, Lunar Soil, Lunik Lunar Probes, Mineralogy

Scientific paper

Soils from the Soviet Luna 24 mission to Mare Crisium contain fragments of ferrobasalt and ferrogabbro. The ferrobasalt is very low in Ti content (about 1.0 wt.% TiO2), similar to very-low-Ti (VLT) basalts from Apollo 17. It is characterized by Mg/(Mg + Fe) of approximately 0.3-0.4, Al2O3 about 13%, CaO about 13%, and Cr2O3 about 0.2-0.3%. Brown glasses and micropoikilitic fragments similar to the ferrobasalt occur in the Crisium soils, and green glasses similar to the Apollo 17 VLT basalt have been found. There is growing evidence that very-low-Ti basalts may be an abundant mare basalt type; there is a possibility that this suite may be derived by crystal fractionation from magma similar to green glass in composition.

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