Sample Petrographic Description
Sample Number | MIL 15362 |
Newsletter | 42,1 |
Location | Miller Range |
Field Number | 23621 |
Dimensions (cm) | 4.6 x 2.8 x 1.9 |
Weight (g) | 42.63 |
Original Classification | H4 Chondrite (Anomalous) |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 16;Ferrosilite (mol%): 9-26 | |
Weathering | |
B/C | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
The exterior has 60% black/brown fusion crust with oxidation haloes, and rust. Exposed surfaces are brown with inclusions/chondrules visible. The interior is weathered brown with metal and some rusty/weathered inclusions/chondrules. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section exhibits numerous small, well-defined chondrules up to 1.5 mm in a black matrix of fine grained silicates, metal and troilite. Polysynthetically twinned pyroxene is abundant. The meteorite is moderately weathered. Olivine is Fa16, pyroxene is Fs9-26. The meteorite is a low FeO chondrite of type 4 (Russell et al. MAPS 1998). The meteorite is similar in mineral compositions to Willaroy and Suwahib (Buwah). |
Antarctic Meteorite Images for Sample MIL 15362 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 15362 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL15362 | |
Zhu, K., Schiller, M., Moynier, F., Groen, M., Alexander, C.M.D., Davidson, J., Schrader, D.L., Bischoff, A., and Bizzarro, M., 2023, Chondrite diversity revealed by chromium, calcium and magnesium isotopes. Geochimica et Cosmochimica Acta, 342, 156–168, https://doi.org/10.1016/j.gca.2022.12.014. | |
Zhu, K., and Becker, H., Moynier, F., Alexander, C.M.O'D., Davidson, J., Schrader, D.L., Zhu, J-M., Wu, G-L., Schiller, M., Bizzarro, M., 2021, Chromium stable isotope panorama of chondrites and implications for early Earth accretion, The Astrophysical Journal, 923:94, doi: 10.3847/1538-4357/ac2570. |