Table 2
Mean bulk chemical composition (weight %) of the various meteorite classes.
| H | L | LL | CM | HED | Argilite | Basalt | |
|---|---|---|---|---|---|---|---|
| Si | 16.9 | 18.5 | 19.0 | 13.3 | 23.0 | 14.66 | 20.17 |
| Ti | 0.060 | 0.063 | 0.069 | 0.069 | 0.35 | 0.27 | 1.52 |
| Al | 1.13 | 1.22 | 1.10 | 1.12 | 6.93 | 5.95 | 6.85 |
| Cr | 0.366 | 0.388 | 0.41 | 0.303 | 0.22 | 0.0052 | 0.043 |
| Fe | 27.5 | 21.5 | 19.1 | 20.6 | 14.3 | 2.66 | 8.74 |
| Mn | 0.232 | 0.257 | 0.22 | 0.160 | 0.43 | 0.041 | 0.16 |
| Mg | 14.0 | 14.9 | 15.2 | 11.9 | 4.15 | 2.45 | 6.66 |
| Ca | 1.25 | 1.31 | 1.40 | 1.29 | 7.43 | 15.57 | 7.02 |
| Na | 0.64 | 0.70 | 0.73 | 0.30 | 0.30 | 0.096 | 2.88 |
| K | 0.078 | 0.083 | 0.091 | 0.029 | 0.025 | 1.59 | 1.44 |
| P | 0.108 | 0.095 | 0.103 | 0.100 | – | – | 0.39 |
| Ni | 1.60 | 1.20 | 0.89 | 1.20 | – | 0.0024 | 0.0026 |
| Co | 0.081 | 0.059 | 0.040 | 0.058 | – | 0.00087 | 0.0048 |
| S | 2.0 | 2.2 | 3.4 | 2.3 | 0.07 | – | – |
| H2O | – | – | – | 12.6 | – | – | – |
| C | 0.11 | 0.09 | 0.022 | 1.88 | – | – | – |
| O | 35.7 | 37.7 | 38.275 | 43.2 | 43.2 | 31.0 | 42.8 |
Notes. For Murchison (CM) and Saint-Séverin (LL), the bulk composition was retrieved from the literature (Jarosewich 1990). For the H, L, and eucrite meteoritic samples, we used the mean bulk composition of the respective classes from Hutchison (2004). We also add the bulk composition (weight %) of terrestrial argillite and basalt, measured at the French institute SARM using mass spectrometry. Spectra for the latter two samples were presented in Loehle et al. (2017) but analysed in the present paper. SARM = Service d’Analyse des Roches et Minéraux, Strasbourg, France.
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