Cathodoluminescence color zonation in the Antarctic meteorite (enstatite chondrite) of Yamato 86004
Publié en ligne: 01 juin 2017
Pages: 136 - 141
Reçu: 14 mars 2016
Accepté: 11 janv. 2017
© 2016 S. Ohgo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Chemical compositions on an average of three analyses of the enstatite with different CL colors and fusion crust in each zone. n.d.: not detected.
| Enstatite in zone 1 | Enstatite in zone 2 | Enstatite in zone 3 | Fusion crust in zone 4 | |
---|
SiO2 | 59.80 | 59.96 | 59.20 | 53.90 | wt.% |
TiO2 | n.d. | 0.01 | n.d. | n.d. | |
Al2O3 | 0.11 | 0.10 | 0.07 | 4.24 | |
FeO | 0.43 | 0.11 | 0.60 | 30.60 | |
Cr2O3 | 0.02 | n.d. | 0.02 | 0.39 | |
MnO | n.d. | n.d. | 0.04 | 0.94 | |
MgO | 39.81 | 39.74 | 39.48 | 5.05 | |
CaO | 0.26 | 0.28 | 0.24 | 3.55 | |
NiO | 0.01 | 0.01 | 0.06 | n.d. | |
Na2O | 0.01 | n.d. | n.d. | 1.41 | |
K2O | 0.01 | 0.01 | 0.01 | n.d. | |
Total | 100.46 | 100.22 | 99.73 | 100.00 | |