| Newsletter |
36,1 |
| Location |
Miller Range |
| Field Number |
21585 |
| Dimensions (cm) |
3.5 x 2.5 x 2.0 |
| Weight (g) |
30.12 |
| Original Classification |
Diogenite |
| Pairing |
MIL 090112; MIL 090291; MIL 11099; MIL 11201; MIL 11202; MIL 11204; MIL 11205 |
| Ferrosilite (mol%): 30-48 |
| A/Be |
| A |
| The exterior surfaces have black patches of fusion crust that are glassy in some areas. The interior matrices are crème/tan colored with crystalline faces. Some yellow oxidation is present. These diogenites have a medium to coarse grained texture. |
| The sections show a groundmass of coarse (up to 1.5 mm) comminuted pyroxene, with minor plagioclase, euhedral chromites (30 microns). Pyroxene compositions are Fs30-48Wo1-4and plagioclase is An87-92Or1. The Fe/Mn ratio of the pyroxene is ~28-29. These meteorites exhibit numerous shock features (including pockets of glass). MIL 11197 is less fragmented and the overall grain size is slightly larger, including a large (~2x4 mm) chromite grain. These are brecciated diogenites. They are similar enough to suggest pairing with the MIL 090112 group of brecciated diogenites described in the Fall 2012 newsletter. |
