Table 2 Average mineral compositions of olivine (Ol) and plagioclase (Pl) grains in lunar meteorite Northwest Africa (NWA) 2977 PTS 01-1 (this work), in comparison with those of Zhang et al. (2011)
This work | Zhang et al. (2011) | ||||
|---|---|---|---|---|---|
Oxide (wt%) No. | Ol 16 | Pl 7 | Ol | Pl | Pl |
SiO2 | 37.72(0.33) | 46.16(1.35) | 38.1 | 45.0 | 49.4 |
TiO2 | b.d. | b.d. | 0.08 | 0.11 | |
Al2O3 | b.d. | 34.07(0.80) | b.d. | 35.2 | 32.3 |
Cr2O3 | 0.05(0.02) | b.d. | 0.03 | ||
FeO | 26.31(0.40) | 0.08(0.02) | 27.6 | 0.24 | 0.45 |
MnO | 0.33(0.06) | 0.04(0.02) | 0.24 | ||
MgO | 34.02(0.26) | 0.18(0.07) | 33.5 | 0.08 | 0.17 |
CaO | 0.11(0.03) | 18.04(0.60) | 0.15 | 19.1 | 15.7 |
Na2O | b.d. | 0.93(0.33) | b.d. | 0.67 | 1.34 |
K2O | b.d. | 0.17(0.05) | b.d. | 0.09 | 1.24 |
P2O5 | b.d. | 0.15(0.01) | |||
Total | 98.54 | 99.82 | 99.6 | 100.4 | 100.7 |
Mg# | 70 | 68 | |||
An | 90.6 | 93.5 | 80.1 | ||
Ab | 8.4 | 6.0 | 12.3 | ||
Or | 0.5 | 0.5 | 7.5 | ||