Using Apollo 17 high-Ti mare basalts as windows to the lunar mantle

Details Using Apollo 17 high-Ti mare basalts as windows to the lunar mantle Using Apollo 17 high-Ti mare basalts as windows to the lunar mantle

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ga17.conf...40n&link_type=abstract

In Lunar Science Inst., Workshop on Geology of the Apollo 17 Landing Site p 40-41 (SEE N93-18786 06-91)

Computer Science

Basalt, Feldspars, Lunar Geology, Lunar Mantle, Lunar Maria, Lunar Rocks, Lunar Soil, Ilmenite, Kreep, Lithology, Lunar Crust, Petrology

Scientific paper

The Apollo 17 high-Ti mare basalts are derived from source regions containing plagioclase that was not retained in the residue. Ilmenite appears to remain as a residual phase, but plagioclase is exhausted. The open-system behavior of the type B2 basalts results in slightly higher Yb/Hf and La/Sm ratios. The nature of the added component is not clear, but may be a KREEP derivative or residue. The recognition of plagioclase in the source(s) of these basalts suggests that the location of the source region(s) would be more likely to be less than 150 km (i.e., closer to the plagioclase-rich crust), which would allow incorporation of plagioclase into the source through incomplete separation of crustal feldspar.

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