The hydroxyl content and hydrogen isotope composition of Lunar apatites

Barnes, Jessica; Anand, M.; Franchi, I. A.; Starkey, N. A.; Ota, Y.; Sani, Y.; Russell, S. S. and Tartèse, R. (2012). The hydroxyl content and hydrogen isotope composition of Lunar apatites. In: 43rd Lunar and Planetary Science Conference, 19-23 Mar 2012, The Woodlands, TX, US.

URL: http://www.lpi.usra.edu/meetings/lpsc2012/pdf/1797...

Abstract

Initial studies of Apollo rock samples concluded that the Moon was an anhydrous planetary body [1]. Recently there has been a change of opinion with several research groups detecting variable amounts of H2O in lunar mare glass beads [2], melt inclusions [3] and hydroxyl in lunar apatites [4-9]. The maximum amount of water detected thus far has been from mare basalt 12039 [10]. These authors also measured the D/H ratio of lunar apatites, with δD values ranging from – 215 ‰ to +1010 ‰ in the case of mare basalts and from +240 ‰ to +340 ‰ in the case of highlands anorthosite clast 14305. The water content of these samples varied from ~0 to 0.6 wt.%. Here we report δD values and hydroxyl contents of apatite grains from Apollo mare basalt 12064 and lunar mare basalt meteorite Miller Range MIL 05035.

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