Abstract
Through the use of the cosmochemistry and astrogeology and differentiated by time, Carlson et al. (2014) divided lunar rocks into five types. (1) Initial crystallization: In the magma ocean model for the Moon, the Moon first crystallized mafic silicates. (2) Ferroan anorthosite (FAN) and floating plagioclase: After 70–80% crystallization of the magma ocean, plagioclase began to crystallize and float to form the FAN series of lunar highland rocks. (3) Mafic cumulates with Europium (Eu) anomaly: The extraction of plagioclase from the magma ocean left the mafic cumulates with a deficiency in Eu. (4) Crystallization of KREEP: Further crystallization made a residual liquid called KREEP due to its enrichment in potassium, rare earth elements, and phosphorus. (5) Magnesium-suite cumulate rocks: The final liquid became the lunar highland crusts. There are at least five ages of the Moon. Thus, those who use the Moon age must clarify which age is used in the discussion.
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