Table 2.
Composition of spinel inclusions in three P-E boundary spherules measured by WDS. Two inclusions are measured on MV 898.8 AJ, shown in figure 8a. EHT is set at 15 kV. Inclusion measurements (in per cent) are compared with a terrestrial magnetite sample [73].
| spherule | Ni | Mg | Al | Si | Ti | Fe | Ca | O | total |
|---|---|---|---|---|---|---|---|---|---|
| MV 898.8 AJ no. 1 | 0.10 | 6.01 | 4.61 | 0.45 | 0.20 | 54.64 | 0.05 | 32.24 | 98.30 |
| MV 898.8 AJ no. 2 | 0.16 | 5.07 | 4.62 | 0.44 | 0.24 | 56.20 | 0.10 | 32.35 | 99.18 |
| MV 898.8 AM | 0.03 | 3.53 | 3.04 | 1.04 | 0.11 | 61.02 | 0.11 | 32.56 | 101.43 |
| MV 898.8 AN | 0.03 | 1.90 | 0.33 | 0.11 | 0.05 | 65.24 | 0.14 | 29.81 | 97.63 |
| terrestrial magnetite [73] | — | tr. | 0.13 | 0.24 | tr. | 73.26 | tr. | 26.37 | 100.11 |