Sample Petrographic Description
Sample Number | GRO 17189 |
Newsletter | 41,2 |
Location | Grosvenor Mountains |
Field Number | 25797 |
Dimensions (cm) | 3.5 x 2.5 x 1.7 |
Weight (g) | 25.32 |
Original Classification | Eucrite (Polymict) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 26-60 | |
Weathering | |
A | |
Fracturing | |
B | |
Macroscopic Description - Cecilia Satterwhite, Rachel Funk | |
The exterior is 70% covered in black glassy fusion crust. The exposed surface is a gray matrix with black veins running along fractures. There are white inclusions present. There are minor amounts of rust near the fusion crust. The fresh surface shows a coarse-grained gray matrix with white inclusions. There are fractures with black veins running along them | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section is dominated by a single clast of fine-grained eucritic material, with adhering brecciated, fine to coarse eucritic fragments. Mineral compositions are homogeneous with orthopyroxene (Fs60Wo2), augite (Fs26Wo43), and plagioclase (An90-92Or0.5). The Fe/Mn ratio of the pyroxene is ~31. The meteorite is a polymict eucrite. |
Antarctic Meteorite Images for Sample GRO 17189 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRO 17189 | ||||
Thin Section Photo(s) : | ||||