Sample Petrographic Description
Sample Number | MIL 07273 |
Newsletter | 33,1 |
Location | Miller Range |
Field Number | 19762 |
Dimensions (cm) | 2.1 x 2.1 x 2.0 |
Weight (g) | 33.88 |
Original Classification | H5 Chondrite (Anomalous) |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 16;Ferrosilite (mol%): 14 | |
Weathering | |
B/C | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
The exterior is covered by black fusion crust with rusty oxidized areas. Most of the interior is a rusty brown especially along fractures. Some dark gray areas are visible with metal and small light gray inclusions. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Linda Welzenbach | |
This meteorite is a moderately metamorphosed, shock blackened chondrite whose mafic silicate compositions are more magnesian (Fa6, Fs4) than typically seen in H chondrites. It is similar to several chondrites described as low-FeO chondrites by Russell et al. (1998, MAPS, 853-856) and is petrologic type 5. |
Antarctic Meteorite Images for Sample MIL 07273 | ||||
Thin Section Photo(s) : | ||||
References for Sample MIL07273 | |
Greenwood, R.C., Burbine, T.H., and Franchi, I.A., 2020, Linking Asteroids and meteorites to the primordial planetesimal population. Geochimica et Cosmochimica Acta, 277, 377-406, doi: 10.1016/j.gca.2020.02.004. | |
Ruzicka, A. M., Hutson, M., Friedrich, J. M., Rivers, M. L., Weisberg, M. K., Ebel, D. S., ... & Dolan, A. A. , 2017, Petrogenesis of Miller Range 07273, a new type of anomalous melt breccia: Implications for impact effects on the H chondrite asteroid. . Meteoritics & Planetary Science, 52, 1963-1990, doi: 10.1111/maps.12901. |