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Fig. 8 | Earth, Planets and Space

Fig. 8

From: 40Ar/39Ar and cosmic ray exposure ages of plagioclase-rich lithic fragments from Apollo 17 regolith, 78461

Fig. 8

Comparison of Fe/(Fe + Mg) and An(%) for plagioclase-rich lithic fragments with lunar lithologies. Fe/(Fe + Mg) and An(%) for plagioclase-rich lithic fragments (filled circles) compared with mare basalt and highland rocks. The hatched area in all the panels represent the range of values (Table 3) observed for different lithologic components. a Numbers beside the circles represent sample names (e.g., 1 Plag#1). No lithic fragments overlap the range of values reported for high-Ti basalt. b Plag#24, Plag#14, Plag#22, and Plag#25 have compositions similar to VLT basalt. c Except Plag#1, all the lithic fragments overlap the range of composition observed for AN component. d Plag#24, Plag#14, Plag#3, Plag#9, and Plag#8 have compositions similar to that of NB component. e The compositions of Plag#23, Plag#22, Plag#25, Plag#10, Plag#3, and Plag#21 are within the range observed for troctolite component of Mg-suite rocks. f Three plagioclase-rich lithic fragments (i.e., Plag#3, Plag#6, and Plag#9) have compositions within the range observed for the norite component of Mg-suite rocks. Source of data for different lithologic compositions is given in Table 3

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