Mathematics – Logic
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987em%26p...38...97c&link_type=abstract
Earth, Moon, and Planets (ISSN 0167-9295), vol. 38, June 1987, p. 97-112.
Mathematics
Logic
15
Geochemistry, Lunar Composition, Lunar Geology, Abundance, Basalt, Lunar Maria, Lunar Rocks, Regolith
Scientific paper
Based on regional maps of orbital geochemical variables, major geochemical heterogeneities in the Undarum/Sumans/Balmer region of the moon are found which are usually associated with distinct geological features, and which reveal a north/south dichotomy. The mapped mare and plains units are often the site of heterogeneity, and the plains units in the Balmer basin are probably composed of volcanic material, possibly KREEP-enriched basalt. Data suggest that the northeastern part of the region may contain a minor spinel component. Major mare units of the region are found to have two distinct compositions, possibly indicating two different source regions for the basalts deposited there, but more likely indicating contamination with different amounts of highland debris.
Clark Pamela E.
Hawke Bernard Ray
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