Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1317t&link_type=abstract
Lunar and Planetary Science, volume 27, page 1317
Computer Science
2
Basalt: Mare, Mantle: Lunar, Mare Compositions, Maria: Lunar, Titanium
Scientific paper
We have developed analytical techniques to accurately determine the FeO and TiO2 contents from reflectance spectra, and applied these to a global data set (35-km spatial resolution) obtained by the Clementine mission. The data show that lunar mare basalts vary continuously in composition from very low-Ti to high-Ti basalts. Basalts with TiO2 contents in the range 2-4 wt.% are most abundant, though basalts with lower TiO2 are significant. Abundance decreases with increasing TiO2: only 5% of the mare surfaces contain >7.5 wt.% TiO2. This is consistent with the relative abundances of very-low to high-Ti cumulates produced in a magma ocean. Some maria have notably lower FeO (by at least 5 wt.%) than typical; these include Nectaris, Frigoris, and Orientale. These maria may be composed of basalts richer in Al2O3 than aluminous mare basalts in the sample collection.
Hawke Bernard Ray
Jeffrey Taylor G.
Lucey Paul G.
Spudis Paul D.
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