The geochemistry and provenance of Apollo 16 mafic glasses

Compositional and lithological diversity among brecciated lunar meteorites of intermediate iron concentration

“…Some nonmare component must be the carrier of the incompatible elements and that component is both more mafic and richer in incompatible elements than samples identified as "KREEP" in the Apollo collection. Among Apollo samples of which we are aware, only the rare basaltic andesite glasses in the Apollo 16 regolith (Zeigler et al 2006b) are similar in FeO, Na 2 O, and K 2 O concentration.…”

Apollo 17 regolith, 71501,262: A record of impact events and mare volcanism in lunar glasses

“…7j), which does not allow for a correlation of this compositional suite between these two widely separated landing sites. Although this compositionally distinctive group of mafic KREEP glasses has been proposed to have been ballistically transported from the KREEP-rich Procellarum region (Zeigler et al 2006a), their presence has not yet been detected at the Apollo 14 site (Brown et al 1971;Simon et al 1989;Vaniman, 1990;Zellner et al 2002) where the compositions of ~1200 glasses have been reported (i.e., this composition likely makes up <0.1% of all Apollo 14 glasses).…”

Physical, Chemical and Mineral Properties of the Polonnaruwa Stones

“…Zeigler et al 44 , 2006 examined the major element compositions of 280 mafic glasses (>10 wt% FeO) from six different Apollo 16 soil samples that were formed through impact melting or pyroclastic eruption. Five of the six classes of glass examined were determined to have an impact origin as determined by the presence of metal with meteoritic Fe:Ni ratios (~94:6) within the glass fragments, the volatilisation of alkali elements and that their composition was dissimilar to previously recognized eruptive lunar samples.…”