| Sample | MG3D | MG3D | MG3D | MG3C | MG3C | MG3C |
| Mineral | Chlorite | |||||
| Analyse N˚ | 47 | 48 | 49 | 71 | 72 | 80 |
| SiO2 | 23.26 | 23.32 | 22.8 | 22.38 | 23.28 | 23.13 |
| Al2O3 | 20.95 | 21.57 | 20.3 | 21.33 | 20.74 | 20.66 |
| TiO2 | 0.04 | 0.12 | 0.09 | 0 | 0.08 | 0.09 |
| FeO | 40.06 | 39.27 | 40.98 | 40.02 | 40.25 | 40.4 |
| MnO | 0.24 | 0.22 | 0.26 | 0.29 | 0.33 | 0.29 |
| MgO | 4.25 | 4.1 | 4.6 | 4.33 | 4.16 | 4.17 |
| CaO | 0.08 | 0.01 | 0.01 | 0.05 | 0.03 | 0.03 |
| Cr2O3 | 0.05 | 0 | 0.03 | 0.02 | 0.03 | 0 |
| Na2O | 0 | 0.04 | 0 | 0.02 | 0 | 0.02 |
| K2O | 0 | 0.03 | 0.01 | 0.08 | 0 | 0 |
| TOTAL | 88.93 | 88.68 | 89.08 | 88.52 | 88.9 | 88.79 |
| Structural formula (28 Oxygens) |
| |||||
| Si | 5.26 | 5.26 | 5.19 | 5.10 | 5.28 | 5.26 |
| Al | 5.58 | 5.73 | 5.45 | 5.73 | 5.54 | 5.53 |
| Z | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 | 8.00 |
| ALIV | 2.74 | 2.74 | 2.81 | 2.90 | 2.72 | 2.74 |
| ALVI | 2.85 | 2.99 | 2.63 | 2.84 | 2.82 | 2.79 |
| Ti | 0.01 | 0.02 | 0.02 | - | 0.01 | 0.02 |
| Fe | 7.58 | 7.41 | 7.80 | 7.63 | 7.63 | 7.68 |
| Mn | 0.05 | 0.04 | 0.05 | 0.06 | 0.06 | 0.06 |
| Mg | 1.43 | 1.38 | 1.56 | 1.47 | 1.41 | 1.41 |
| Ca | 0.02 | 0.00 | 0.00 | 0.01 | 0.01 | 0.01 |
| Cr | 0.01 | - | 0.01 | 0.00 | 0.01 | - |
| Ni | - | - | - | - | - | - |
| Na | - | 0.02 | - | 0.01 | - | 0.01 |
| K | - | 0.01 | 0.00 | 0.02 | - | - |
| TOTAL | 33.52 | 33.60 | 33.52 | 33.78 | 33.48 | 33.50 |
| XFe | 0.84 | 0.84 | 0.83 | 0.84 | 0.84 | 0.84 |