Coordinated Microanalysis of Phosphates in High-Titanium Lunar BasaltsLaboratory studies of lunar apatite [Ca5(PO4)3(F,Cl,OH)] have been important for determining the volatile inventory of the interior and the roles volatiles played during the magmatic evolution of the Moon. It has been suggested that high-Ti mare basalts sample volatiles from a distinct reservoir in the lunar mantle. However, there is still debate surrounding the crystallization and post-crystallization history of apatite in those basalts. This information is required before we can use apatite to characterize the abundance or isotopic composition of volatiles in melts or magmatic source regions. Our goal is to investigate the mineral chemistry, crystal structure, and volatile inventory of phosphates in high-Ti basalts from Apollo 11, which will allow us to determine the crystallization history of apatite in these rocks and identify any potential secondary processes that have changed the volatile composition that apatite acquired from the melt.
Document ID
20180007814
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Barnes, J. J. (ARES Corp. Houston, TX, United States)
Thompson, M. S. (ARES Corp. Houston, TX, United States)
Mccubbin, F. M. (NASA Johnson Space Center Houston, TX, United States)
Howe, J. Y. (Hitachi High Technologies America Inc. Irving, TX, United States)
Rahman, Z. (Jacobs Technology, Inc. Houston, TX, United States)
Messenger, S. (NASA Johnson Space Center Houston, TX, United States)
Zega, T. (Arizona Univ. Tucson, AZ, United States)