Abstract

We have used theG-mode central method to classify sets of major oxide chemical data of lunar rocks (163 averages) and lunar glasses (921 separate analyses). These data were selected from the Lunar Data Base using the following criteria: (1) the amount of SiO2, Al2O3, TiO2, FeO, MgO, CaO, Na2O, and K2O were measured by the same group of investigators and (2) the sum of these 8 major oxides was in the range 97.0–103.0 wt.% for the rocks and 99.0–101.0 for the glasses.

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