Sample Petrographic Description
Sample Number | EET 96299 |
Newsletter | 21,2 |
Location | Elephant Moraine |
Field Number | 10674 |
Dimensions (cm) | 3.5 x 2.5 x 2.0 |
Weight (g) | 50.54 |
Original Classification | EH4-5 Chondrite |
Updated Classification | EH4/5 Chondrite |
Pairing | EET 96135; EET 96202; EET 96217; EET 96223; EET 96299; EET 96309; EET 96341; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-1 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride, Carol Schwarz, Cecilia Satterwhite | |
These meteorites have brownish black polygonally fractured fusion crust with iridescent oxidation haloes present. All samples had fractures that penetrated the surface and are very friable. The interiors are steel gray to black, fine-grained, sugary textured, with metal grains visible. Rusty colored oxidation rind is present. Minor rust is present. These meteorites smell like sulfur and have very small light colored chondrules. | |
Thin Section Description (,2) - Tim McCoy | |
The sections consists of an aggregate of small chondrules (most less than 0.5 mm), chondrule fragments and pyroxene grains with metal, troilite, daubreelite and niningerite. Weathering is relatively minor. Enstatite is Fs0.-1. One grain of free silica was analyzed and metal contains ~1.8 wt. % Si. The meteorite is an EH4-5 chondrite. | |
Reclassification Notes (AMN 31,1) | |
Reclassified as EH4/5 Chondrite in AMN 31,1. |
Antarctic Meteorite Images for Sample EET 96299 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 96299 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96299 | |
Dyar, M.D., Wallace, S.M., Burbine, T.H., and Sheldon, D.R., 2023, A machine learning classification of meteorite spectra applied to understanding asteroids. Icarus, 406, 115718, https://doi.org/10.1016/j.icarus.2023.115718. | |
Johnston, S., Brandon, A., McLeod, C., Rankenburg, K., Becker, H., and Copeland, P., 2022, Nd isotope variation between the Earth-Moon system and enstatite chondrites, Nature, 611, doi: 10.1038/s41586-022-05265-0. | |
Zhu, K., and Becker, H., Moynier, F., Alexander, C.M.O'D., Davidson, J., Schrader, D.L., Zhu, J-M., Wu, G-L., Schiller, M., Bizzarro, M., 2021, Chromium stable isotope panorama of chondrites and implications for early Earth accretion, The Astrophysical Journal, 923:94, doi: 10.3847/1538-4357/ac2570. | |
Schultz, L., Franke, L., 2004, Helium, neon, and argon in meteorites: A data collection. Meteoritics & Planetary Science, 39, 1889-1890, http://dx.doi.org/10.1111/j.1945-5100.2004.tb00083.x. | |
Patzer, A., Schultz, L., 2002, Noble gases in enstatite chondrites II: The trapped component. Meteoritics & Planetary Science, 37, 601-612. | |
Patzer, A., Schultz, L., 2001, Noble gases in enstatite chondrites I: Exposure ages, pairing, and weathering effects. Meteoritics & Planetary Science, 36, 947-961, http://dx.doi.org/10.1111/j.1945-5100. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |