Sample Petrographic Description
Sample Number | GRO 17048 |
Newsletter | 41,2 |
Location | Grosvenor Mountains |
Field Number | 25575 |
Dimensions (cm) | 3.8 x 2.4 x 2.0 |
Weight (g) | 23.53 |
Original Classification | Eucrite (Polymict) |
Pairing | GRO 17048; GRO 17049; GRO 17099; GRO 17176; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 29-66 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite, Rachel Funk | |
The exterior is 75% covered with black, glassy fusion crust. The exposed surface is a gray matrix with white and beige inclusions as well as minor amounts of brown rust. The fresh interior reveals 2 distinctive areas. One area is a gray matrix with white inclusions and the other area is a light gray to white matrix with abundant mm sized white inclusions. Both areas have beige inclusions and minor amounts of rust. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
These sections are similar enough to suggest that they represent a single, coarse-grained, cataclastized, brecciated, cumulate eucrite. The sections are composed of coarse (up to 2 mm) pyroxene and plagioclase crosscut by numerous offset fractures. Mineral compositions are homogeneous with orthopyroxene (Fs63-66Wo2), with lamellae of augite (Fs20-29Wo52-66), and plagioclase (An88-92Or0.5). The Fe/Mn ratio of the pyroxene is ~31. The meteorites are polymict eucrites. |
Antarctic Meteorite Images for Sample GRO 17048 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRO 17048 | ||||
Thin Section Photo(s) : | ||||