Sample Petrographic Description
Sample Number | EET 96331 |
Newsletter | 21,2 |
Location | Elephant Moraine |
Field Number | 10612 |
Dimensions (cm) | 5.0 x 4.5 x 2.5 |
Weight (g) | 121.93 |
Original Classification | Ureilite |
Pairing | EET 96293; EET 96314; EET 96331; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 13;Ferrosilite (mol%): 11 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
This achondrite has a dull black fusion crusted exterior with a few shiny glassy patches. There is moderate weathering on the exterior surface. The interior is steel gray in color with a crystalline texture. Some crystals are dark in color. | |
Thin Section Description (,4) - Tim McCoy | |
The sections consist of an aggregate of large olivine grains up to 1 mm across with numerous areas of finer-grained (~200mm), equigranular olivine, pigeonite and augite with abundant 120° triple junctions. Individual grains are rimmed by carbon-rich material containing traces of metal. Shock effects are numerous, including undulatory extinction, polysynthetic twinning and kink banding. Olivines have cores of Fa12-13, with rims reduced to Fa2. Pigeonite (Fs11Wo4) and augite (Fs7Wo29) are relatively homogeneous. These meteorites are paired ureilites and may be paired with EET96293. |
Antarctic Meteorite Images for Sample EET 96331 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 96331 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96331 | |
Peterson, L.D., Newcombe, M.E., Alexander, C.M.O'D., Wang, J., Sarafian, A.R., Bischoff, A.and , Nielsen, S.G., 2023, The H2O content of the ureilite parent body, Geochemicia et Cosmochemica Acta, 340, 141-157, doi:10.1016/j.gca.2022.10.036. |