Sample Petrographic Description
Sample Number | EET 96314 |
Newsletter | 21,2 |
Location | Elephant Moraine |
Field Number | 10622 |
Dimensions (cm) | 5.0 x 3.5 x 2.5 |
Weight (g) | 80.34 |
Original Classification | Ureilite |
Pairing | EET 96293; EET 96314; EET 96331; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 2-13;Ferrosilite (mol%): 11 | |
Weathering | |
B | |
Fracturing | |
A | |
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 (,2) - 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 96314 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 96314 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96314 | |
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. | |
Bekaert, D.V., Curtice, J., Meier, M.M.M., Byrne, D.J., Broadley, M.W., Seltzer, A., Barry, P., Kurz, M.D., and Nielsen, S.G., 2022, Determining the noble gas cosmic ray exposure ages of 23 meteorites (8 chondrites and 15 achondrites) from modeling and empirical methods, Meteoritics & Planetary Science, 57:8, 1-28, doi:10.1111/maps.13887. | |
Singletary, S. J., Grove, T. L., 2003, Early petrologic processes on the ureilite parent body. Meteoritics & Planetary Science, 38, 95-108. |