Sample Petrographic Description
Sample Number | EET 92126 |
Newsletter | 17,3 |
Location | Elephant Moraine |
Field Number | 8657 |
Dimensions (cm) | 2.4 x 1.3 x 0.6 |
Weight (g) | 4.83 |
Original Classification | CO3 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-51;Ferrosilite (mol%): 1-2 | |
Weathering | |
B/C | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
Black, frothy fusion crust entirely covers this carbonaceous chondrite. The interior is made up of medium to coarse grained, grayish-brown matrix. A few small weathered inclusions are present as is a small amount of metal. Oxidation is evenly scattered throughout the specimen. | |
Thin Section Description (,2) - Brian Mason | |
The section shows numerous small chondrules (up to 0.6 mm across), chondrule fragments, and mineral grains, in a black matrix containing minor amounts of nickel-iron and troilite concentrated around chondrule margins. Remnants of fusion crust rim part of the section. Microprobe analyses show much of the olivine near Mg2SiO4 in composition, but with individual grains ranging up to Fa51; a little Mg-rich pyroxene is present. The matrix appears to consist largely of iron-rich olivine. The meteorite is classified as a C3 chondrite of the Ornans subtype. |
Antarctic Meteorite Images for Sample EET 92126 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 92126 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET92126 | |
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. |