Table 3
Mineral abundances of some samples of ordinary chondrites characterized in this study as determined by X-ray diffraction.
| Official | Class | Ol | Px | Fe-Ni | Tro | Ab | An | Mag | Hem | Gth | Akg | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | |
| PdM002 | H5 S2 W3 | 40.96 | 31.05 | 0.00 | 2.80 | 7.48 | 4.71 | 4.92 | 0.22 | 5.51 | 2.36 | 100.00 |
| Est. Imilac | H5 S4 W1 | 45.50 | 31.92 | 0.31 | 2.43 | 4.76 | 10.49 | 3.92 | 0.00 | 0.36 | 0.31 | 100.00 |
| SJ002 | H6 S1 W3 | 32.37 | 36.96 | 0.00 | 1.67 | 6.97 | 6.06 | 3.22 | 0.20 | 12.22 | 0.34 | 100.01 |
| Rencoret 001 | H6 S3 W3 | 40.60 | 35.34 | 0.00 | 1.94 | 1.72 | 11.17 | 4.73 | 0.26 | 2.83 | 1.40 | 99.99 |
| La Yesera 003 | L4 S3 W4 | 44.56 | 28.79 | 0.00 | 0.71 | 5.28 | 6.02 | 3.00 | 0.22 | 9.92 | 1.32 | 99.82 |
| Pampa (b) | L4/5 S4 W3 | 48.81 | 29.21 | 0.00 | 1.47 | 3.02 | 8.47 | 3.82 | 0.00 | 3.35 | 1.55 | 99.70 |
| Pampa (d) | L5 S2 W2/3 | 41.48 | 33.74 | 0.00 | 0.95 | 3.52 | 8.05 | 4.09 | 0.20 | 6.80 | 1.18 | 100.01 |
| Pampa (g) | L5 S2 W3 | 32.70 | 37.09 | 0.00 | 0.00 | 5.10 | 7.23 | 3.44 | 0.25 | 14.15 | 0.03 | 99.99 |
| La Yesera 004 | L6 S2 W3 | 44.30 | 35.11 | 0.01 | 0.00 | 1.52 | 7.49 | 3.38 | 0.20 | 6.07 | 1.02 | 99.10 |
| PdM007 | L6 S3 W4 | 36.75 | 23.74 | 0.00 | 0.00 | 4.70 | 14.48 | 8.44 | 0.24 | 11.65 | 0.00 | 100.00 |
| PdM004 | L6 S3 W4/5 | 43.19 | 27.19 | 0.00 | 0.00 | 3.01 | 11.62 | 4.25 | 0.33 | 10.40 | 0.00 | 99.99 |
| Lutschaunig stone | L6 W1 | 55.01 | 28.85 | 0.18 | 2.94 | 5.77 | 1.66 | 4.58 | 0.00 | 0.78 | 0.23 | 100.00 |
| La Yesera 002 | LL5 S2 W2 | 50.95 | 27.14 | 0.00 | 1.28 | 3.09 | 13.12 | 1.58 | 0.20 | 2.69 | 0.00 | 100.05 |
Notes. These data are from Valenzuela Picón (2011). Abundances are presented in wt (%). Pyroxene corresponds to diopside and enstatite. Primary minerals are olivine, pyroxene, Fe-Ni, and troillite. Secondary minerals minerals are formed from secondary processes, including both thermal metamorphism and aqueous alteration (albite, anorthite, and likely magnetite). Minerals formed from terrestrial weathering are separate from these (goethtite, hematite; IMA symbol).
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