EVOLUTION OF THE MOON

By understanding the origin and evolution of the Moon, we achieve two things.  The first is that as the Moon essentially died 3 billion years ago, we have a possible snap shot of the evolution of Earth at this time.  The second is evaluating materials for a future Moon base.  Currently I am looking at the evolution of the lunar mantle through the detailed study of lunar volcanics.  The Moon underwent a global melting event shortly after formation to form a magma ocean.  As this crystallized, it formed the source regions of the basalts returned by the Apollo missions.  However, picritic glass beads also returned appear to be derived from separate, deeper areas. Our recent research strongly suggests such source regions contained garnet - the first such evidence.  It also suggests that the whole moon did not melt during the magma ocean event.

Papers resulting from this research:

Anand M., Taylor L.A., Neal C.R., Snyder G.A., Patchen A., Sano Y., and Terada K. (2003) Lunar meteorite EET 96008: Geochemistry and petrogenesis. Geochim. Cosmochim. Acta 67, 3499-3518.

Neal C.R. (2001) The interior of the Moon: The presence of garnet in the primitive, deep lunar mantle. J. Geophys. Res. 106, 27,865-27,885.

Jolliff B.L., Gaddis L.R., Ryder G., Neal C.R., Shearer C.K., Elphic R.C., Johnson J.R., Keller L.P., Korotev R.L., Lawrence D.J., Lucey P.G., Papike J.J., Spudis P., Pieters C.M. and Taylor L.A. (2000) New views of the Moon: Improved Understanding Through Data Integration. EOS Trans. Am. Geophys. Union 81, 349, 354-355.

Neal C.R. and Taylor L.A. (1998) Exploring the Complexities of the Serenitatis Basin: Breccia Clasts from Apollo 17. Internat. Geol. Rev.  40, 945-962.

Snyder G.A., Neal C.R., Taylor L.A., and Halliday A.N. (1997) Anatexis of lunar cumulate mantle in time and space: Clues from trace-element, strontium, and neodymium isotopic chemistry of parental Apollo 12 basalts. Geochim. Cosmochim. Acta 61, 2731-2748.

Podosek F.A., Ott U., Brannon J.C., Neal C.R., Bernatowicz T.J., Swan P., and Mahan S.E. (1997) Thoroughly anomalous chromium in Orgueil.  Meteoritics & Planet. Sci. 32, 617-627.

Snyder G.A., Neal C.R., Taylor L.A., and Halliday A.N. (1995) Processes involved in the formation of magnesian-suite plutonic rocks from the highlands of the Earth's Moon.  J. Geophys. Res. - Planets 100, 9365-9388.

Neal C.R., Hacker M.D., Taylor L.A., Schmitt R.A., and Liu Y.-G. (1994) Basalt generation at the Apollo 12 site, part 1: New data, classification, and re-evaluation. Meteoritics 29, 334-348.

Neal C.R., Hacker M.D., Taylor L.A., Schmitt R.A., and Liu Y.-G. (1994) Basalt generation at the Apollo 12 site, part 2: Source heterogeneity, multiple melts, and crustal contamination. Meteoritics 29, 349-361.

Neal C.R. and Taylor L.A. (1992) Petrogenesis of mare basalts: A record of lunar volcanism. Geochim. Cosmochim. Acta 56, 2177-2211. INVITED.

Snyder G.A., Taylor L.A., and Neal C.R. (1992) A chemical model for generating the sources of mare basalts: Combined equilibrium and fractional crystallization of the Lunar magmasphere. Geochim. Cosmochim. Acta 56, 3809-3824.

Neal C.R., Taylor L.A., and Schmitt R.A. (1991) Paired lunar meteorites MAC88104 and MAC88105: A new "FAN" of lunar petrology. Geochim. Cosmochim. Acta 55, 3037-3049.

Neal C.R. and Taylor L.A. (1991) Evidence for metasomatism of the Lunar Highlands and the origin of whitlockite. Geochim. Cosmochim. Acta 55, 2965-2980.

Paces J.B., Nakai S.N., Neal C.R., Taylor L.A., Halliday A.N., and Lee D.-C. (1991) A Sr and Nd study of Apollo 17 high-Ti mare basalts:  Resolution of ages, evolution of magmas, and origins of source heterogeneities. Geochim. Cosmochim. Acta  55, 2025-2043.

Neal C.R. Taylor L.A., Patchen A.D., Hughes S.S., and Schmitt R.A. (1990) The significance of fractional crystallization in the petrogenesis of Apollo 17 Type A and B high-Ti basalts. Geochim. Cosmochim. Acta  54, 1817-1833.

Neal C.R. and Taylor L.A. (1990) AFC modeling of lunar basalt petrogenesis: Sr isotope evidence from Apollo 14 high-alumina basalts. Proc. Lunar Planet. Sci. Conf. 20th, 101-108.

Neal C.R. and Taylor L.A. (1989) Metasomatic products of the Lunar Magma Ocean:  The role of KREEP dissemination. Geochim. Cosmochim. Acta 53, 529-541.

Neal C.R., Taylor L.A., and Patchen A.D. (1989) High alumina (HA) and very high potassium (VHK) basalt clasts from Apollo 14 breccias, part 1 - mineralogy and petrology;  Evidence of crystallization from evolving magmas. Proc. Lunar Planet. Sci. Conf. 19th, 137-145.

Neal C.R., Taylor L.A., Patchen A.D., Schmitt R.A., Hughes, S.S., and Lindstrom, M.M. (1989) High alumina (HA) and very high potassium (VHK) basalt clasts from Apollo 14 breccias, part 2 - whole-rock geochemistry; Further evidence for combined assimilation and fractional crystallization within the Lunar crust. Proc. Lunar Planet. Sci. Conf. 19th, 147-162.

Neal C.R. and Taylor L.A. (1989) The nature of barium partitioning between immiscible melts:  A comparison of experimental and natural systems with reference to lunar granite petrogenesis. Proc. Lunar Planet. Sci. Conf. 19th, 209-218.

Neal C.R., Taylor L.A., and Lindstrom M.M. (1988) The importance of Lunar Granite and KREEP in Very High Potassium (VHK) basalt petrogenesis. Proc. Lunar Planet. Sci. Conf. 18th, 121-137.

Neal C.R., Taylor L.A., and Lindstrom M.M. (1988) Apollo 14 mare basalt petrogenesis:  Assimilation of KREEP-like components by a fractionating magma. Proc. Lunar Planet. Sci. Conf. 18th, 139-153.

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