Sample Petrographic Description
Sample Number | GRO 17176 |
Newsletter | 41,2 |
Location | Grosvenor Mountains |
Field Number | 25601 |
Dimensions (cm) | 7.0 x 5.0 x 2.5 |
Weight (g) | 131.11 |
Original Classification | Eucrite (Polymict) |
Pairing | GRO 17048; GRO 17049; GRO 17099; GRO 17176; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 27-63 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite, Rachel Funk | |
The exterior is covered by 90% black fusion crust. The fusion crust has radiating flow lines coming from the top of the sample. The exposed interior is a gray and white matrix with some yellow rust. The fresh interior surface is a gray and white matrix with a black vein running throughout the sample. | |
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. | |
Astromaterials 3D Link(s) | |
https://ares.jsc.nasa.gov/astromaterials3d/sample-details.htm?sample=GRO17176-0 |
Antarctic Meteorite Images for Sample GRO 17176 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRO 17176 | ||||
Thin Section Photo(s) : | ||||