Sample Petrographic Description
Sample Number | MIL 090992 |
Newsletter | 35,1 |
Location | Miller Range |
Field Number | 20358 |
Dimensions (cm) | 2.0 x 1.5 x 1.25 |
Weight (g) | 4.89 |
Original Classification | CM1/2 Chondrite |
Pairing | MIL 090288; MIL 090986; MIL 090992; MIL 090993; MIL 11111; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0-52 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior of these meteorites range from no fusion crust to 50% dull purplish black fusion crust with polygonal fractures. The interior matrices are black with powdery textures and have oxidation rinds. Small light gray chondrules and clasts are visible. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
The sections consist of a few small chondrules (up to 0.5 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa0-56, orthopyroxene is Fs1-9Wo1-4. Aqueous alteration of the matrix is substantial, but the chondrules are only modestly altered. These meteorites are CM1/2 chondrites. |
Antarctic Meteorite Images for Sample MIL 090992 | ||||
Thin Section Photo(s) : | ||||