Sample Petrographic Description
Sample Number | GRO 17099 |
Newsletter | 41,2 |
Location | Grosvenor Mountains |
Field Number | 25736 |
Dimensions (cm) | 3.2 x 2.8 x 2.6 |
Weight (g) | 26.70 |
Original Classification | Eucrite (Polymict) |
Pairing | GRO 17048; GRO 17049; GRO 17099; GRO 17176; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 20-52 | |
Weathering | |
A | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite, Rachel Funk | |
The exterior is 60% covered with black fusion crust. The exposed interior is pitted with a gray, black and white matrix (dominated more by white matrix). There are some brown weathered areas on both the fusion crust and the exposed interior. The fresh interior is mostly comprised of a white matrix with some gray and black speckled throughout. | |
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=GRO17099-0_whole https://ares.jsc.nasa.gov/astromaterials3d/sample-details.htm?sample=GRO17099-0_sub |
Antarctic Meteorite Images for Sample GRO 17099 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRO 17099 | ||||
Thin Section Photo(s) : | ||||