| O | Mg | Al | Si | Ca | Cr | Mn |
①_Matrix | 53.81 | 7.03 | 0.42 | 16.28 | 21.81 | 0.04 | 0.61 |
②_Spinel | 54.81 | 11.96 | 7.54 | 0.63 | 0.77 | 21.38 | 2.93 |