Sample Petrographic Description
Sample Number | MIL 13004 |
Newsletter | 38,2 |
Location | Miller Range |
Field Number | 24381 |
Dimensions (cm) | 15.0 x 10.0 x 8.5 |
Weight (g) | 1804.30 |
Original Classification | Aubrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0;Ferrosilite (mol%): 0 | |
Weathering | |
A/B | |
Fracturing | |
B | |
Macroscopic Description - Mitchell Haller | |
Exterior has black patches of fusion crust. The rest of the exterior shows black matrix with white, black, and gray clasts. The exterior shows moderate fracturing and numerous clasts, the largest is 5.5 mm. Some minimal brown oxidation is visible on one exterior surface. The interior is has a black/gray matrix similar to the exterior but lighter. Black/gray/white inclusions and silvery metal faces are visible. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section consists of coarsely comminuted pyroxene grains up to 0.7 mm with rare olivine present. Coarse pyroxene clasts are extensively shocked, with undulose extinction and shock darkening, and are set in a matrix of finely-comminuted grains. Pyroxenes and olivine are essentially FeO-free (Fs0; Fa0). The meteorite is an aubrite. |
Antarctic Meteorite Images for Sample MIL 13004 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 13004 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL13004 | |
Dyar, M.D., Wallace, S.M., Burbine, T.H., and Sheldon, D.R., 2023, A machine learning classification of meteorite spectra applied to understanding asteroids. Icarus, 406, 115718, https://doi.org/10.1016/j.icarus.2023.115718. | |
Peterson, L.D., Newcombe, M.E., Alexander, C.M.D., Wang, J., Klein, F., Bekaert, D.V., and Nielsen, S.G., 2023, The H content of aubrites: An evaluation of bulk versus in situ methods for quantifying water in meteorites. Earth and Planetary Science Letters, 620, 118341, https://doi.org/10.1016/j.epsl.2023.118341. | |
Wilbur, Z.E., Barnes, J.J., Dygert, N., Zeigler, R.A., Turrin, B.D., and McCoy C., Udry, A., McCubbin, F.M., Vander Kaaden, K.E., Defelice, C., Ziegler, K., Ross, D.K., McCoy, T.J., Gross, J., 2022, The effects of highly reduced magmatism revealed through aubrites, Meteoritics & Planetary Science, 57:7, 1387-1420, doi: 10.1111/maps.13823. | |
Zhao, C., Lodders, K., Bloom, H., Chen, H., Tian, Z., Koefoed, P., Petö, M.K., and Wang, K., 2020, Potassium isotopic compositions of enstatite meteorites. Meteoritics & Planetary Science, 55, 1404–1417, doi: 10.1111/maps.13358. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |