Sample Petrographic Description
Sample Number | MIL 11292 |
Newsletter | 36,1 |
Location | Miller Range |
Field Number | 23238 |
Dimensions (cm) | 4.0 x 3.1 x 2.0 |
Weight (g) | 40.30 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 28-62 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
The exterior is covered with black fusion crust that has a glassy appearance in some areas. Areas without fusion crust are a white and gray matrix with small darker grains and evaporites visible. The mottled gray/white matrix has tiny dark gray, black and white mineral grains. Some oxidation is present. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Nicole Lunning | |
This meteorite is dominated by one large coarse-grained eucritic clast (4 mm x 9 mm) that makes up approximately 80% of the section. In this clast, tabular pyroxene grains range up to 4 mm, while plagioclase is more lathe-like, and ~200 microns in size. Small breccia veins with high concentrations of metal, sulfide and eucritic fragments are seen elsewhere in the section. Mineral compositions are homogeneous with orthopyroxene (Fs62Wo2), with lamellae of augite (Fs28Wo36), and plagioclase (An87-89Or1). The Fe/Mn ratio of the pyroxene is ~27-32. This meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample MIL 11292 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MIL 11292 | ||||
Thin Section Photo(s) : | ||||