Table 3
Representative EPMA analyses of spinel, chromite and olivine, including trace elements measured with a high intensity electron beam (Batanova et al., 2015). na: not analyzed. The complete set of analyzes is provided in the Supplementary Material.
Sélection représentative d’analyses à la microsonde électronique du spinelle, de la chromite et de l’olivine, incluant les éléments traces mesurés avec une forte intesité du faisceau d’électrons (Batanova et al., 2015). na : non analysé. Le jeu de données complet est disponible en matériel supplémentaire.
| Sample | JB-19-21 | JB-19-22 | JB-19-21 | JB-19-21 | JB-19-22 | JB-19-33 |
|---|---|---|---|---|---|---|
| Mineral | Chr | Spl | Olivine | Olivine | Olivine | Olivine |
| LABEL | Spl-09 | Spl-01 | Ol-07 | Ol-18 | Ol-06 | Ol-07 |
| Position | core | core | core | rim | core | core |
| wt% oxides | ||||||
| SiO2 | 0.02 | 0.00 | 40.83 | 39.29 | 40.80 | 40.58 |
| TiO2 | 0.93 | 0.06 | 0.0035 | 0.0016 | 0.0010 | 0.0028 |
| Al2O3 | 4.38 | 37.75 | 0.0000 | 0.0000 | 0.0000 | 0.0018 |
| Cr2O3 | 58.96 | 28.98 | 0.0268 | 0.0110 | 0.0022 | 0.0028 |
| V2O3 | 0.17 | 0.12 | na | na | na | na |
| FeO | 29.47 | 18.10 | 8.79 | 17.27 | 9.66 | 10.78 |
| MnO | 0.87 | 0.18 | 0.1308 | 0.7278 | 0.1455 | 0.1669 |
| MgO | 3.77 | 14.75 | 49.54 | 42.36 | 48.98 | 48.11 |
| CaO | na | na | 0.0091 | 0.0052 | 0.0133 | 0.0133 |
| P2O5 | na | na | 0.0214 | 0.0779 | 0.0136 | 0.0100 |
| NiO | 0.07 | 0.16 | 0.4256 | 0.2446 | 0.3731 | 0.3590 |
| ZnO | 0.64 | 0.40 | na | na | na | na |
| Total | 99.29 | 100.50 | 99.78 | 99.99 | 100.00 | 100.02 |
| Oxygen | 4 | 4 | 4 | 4 | 4 | 4 |
| Cation | ||||||
| Si | – | – | 1.02 | 0.97 | 1.01 | 1.01 |
| Ti | 0.025 | 0.001 | – | – | – | – |
| Al | 0.184 | 1.268 | – | – | – | – |
| Cr | 1.661 | 0.653 | – | – | – | – |
| Fe2+ | 0.752 | 0.343 | 0.36 | 0.71 | 0.40 | 0.44 |
| Fe3+ | 0.127 | 0.089 | – | – | – | – |
| Mg | 0.200 | 0.627 | 1.60 | 1.35 | 1.57 | 1.54 |
| Total cation | 2.95 | 2.98 | 2.98 | 3.03 | 2.99 | 2.99 |
| Mg# | 0.90 | 0.34 | 0.91 | 0.81 | 0.90 | 0.89 |
| Cr# | 0.21 | 0.65 | – | – | – | 0.61 |
| Trace ppm | ||||||
| Ni | 586 | 1259 | 3344 | 1922 | 2932 | 2821 |
| Mn | 6766 | 1365 | 1013 | 5637 | 1127 | 1293 |
| Cr | – | – | 183 | 75 | 15 | 19 |
| V | 1155 | 840 | – | – | – | – |
| Ca | – | – | 65 | 37 | 95 | 95 |
| Ti | 5570 | 357 | 21 | 10 | 6 | 17 |
| Si | 90 | 0 | – | – | – | – |
| Al | – | – | – | – | – | 10 |
| P | 93 | 340 | 59 | 44 | ||
| Zn | 5158 | 3213 | – | – | – | – |
| Ni/Mn | 0.09 | 0.92 | 3.30 | 0.34 | 2.60 | 2.18 |
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