Sample Petrographic Description
Sample Number | MIL 090994 |
Newsletter | 35,1 |
Location | Miller Range |
Field Number | 20125 |
Dimensions (cm) | 2.5 x 2.0 x 1.5 |
Weight (g) | 6.46 |
Original Classification | CM2 Chondrite |
Pairing | MIL 090700; MIL 090994; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0-37;Ferrosilite (mol%): 2 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
Fusion crust is present on the exterior surfaces and range in color from brown to purplish black with polygonal fractures. The interior matrices are black with a few lighter gray patches and gray/white chondrules and clasts. | |
Thin Section Description (,MIL 090700,3; MIL 090994,2) - Cari Corrigan, Linda Welzenbach | |
The sections consist of a few small chondrules (up to 2 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa0-68, orthopyroxene is Fs2Wo2-44. Aqueous alteration of the matrix is light to moderate, and the chondrules are unaltered. The meteorites are CM2 chondrites and are likely paired. |
Antarctic Meteorite Images for Sample MIL 090994 | ||||
Thin Section Photo(s) : | ||||