Sample Petrographic Description
Sample Number | EET 96188 |
Newsletter | 21,2 |
Location | Elephant Moraine |
Field Number | 9914 |
Dimensions (cm) | 3.0 x 3.0 x 2.0 |
Weight (g) | 16.38 |
Original Classification | LL3.2 Chondrite |
Updated Classification | L/LL3.2 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 2-62;Ferrosilite (mol%): 7-22 | |
Weathering | |
A/B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
Thin black patches of fusion crust and oxidation haloes are visible on the exterior of this ordinary chondrite. The interior has a dark matrix full of chondrules, metal grains and some rust. The chondrules are dark gray, white tan, yellow and some are rusty. | |
Thin Section Description (,2) - Tim McCoy | |
The section exhibits numerous large, well-defined chondrules (up to 2 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Glass is present within chondrules, but rare. Polysynthetically twinned pyroxene is extremely abundant. Silicates are quite unequilibrated; olivines range from Fa2-62 and pyroxenes from Fs7-22. The meteorite is an L or LL3 chondrite of subtype ~3.2. It may be paired with EET96109. | |
Reclassification Notes (AMN 33,1) | |
Added "/" to indicate possible transitional between L and LL. |
Antarctic Meteorite Images for Sample EET 96188 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96188 | |
Eschrig, J., Bonal, L., Mahlke, M., Carry,B., Beck, P., Gattacceca, J., 2022, Investigating S-type asteroid surfaces through reflectance spectra of ordinary chondrites, Icarus, 381. | |
Eschrig, J., Bonal, L., Beck, P., Prestgard, T.J., 2021, Spectral reflectance analysis of type 3 carbonaceous chondrites and search for their asteroidal parent bodies. Icarus, 354, 114034, https://doi.org/10.1016/j.icarus.2020.114034. | |
Bonal, L., Quirico, E., Flandinet, L., Montagnac, G., 2016, Thermal history of type 3 chondrites from the Antarctic meteorite collection determined by Raman spectroscopy of their polyaromatic carbonaceous matter. Geochimica et Cosmochimica Acta, 189, 312-337. | |
Wang, M. S., Lipschutz, M. E., 2007, Trace elements in primitive meteorites-VII Antarctic unequilibrated ordinary chondrites. Geochimica et Cosmochimica Acta, 71 Issue 4, 15-Feb-07, 1062-1073, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2006.10.009. |