Sample Petrographic Description
Sample Number | QUE 94582 |
Newsletter | 19,1 |
Location | Queen Alexandra Range |
Field Number | 10248 |
Dimensions (cm) | 2.5 x 2.0 x 1.5 |
Weight (g) | 7.07 |
Original Classification | C2 Chondrite |
Updated Classification | CM2 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 2-31;Ferrosilite (mol%): 1-20 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
Polygonally fractured, vesicular, black fusion crust totally covers QUE94582. The medium gray interior has a few white inclusions scattered throughout. | |
Thin Section Description (,2) - Brian Mason | |
The section shows numerous small grains of olivine and pyroxene and a few chondrules (up to 0.6 mm across) in a matrix which is partly black and opaque and partly pale green and isotropic. Trace amounts of nickel-iron and troilite are present in the matrix. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa2-31; pyroxene, Fs1-20. The meteorite is classified as a C2 chondrite. | |
Reclassification Notes (AMN 33,1) | |
Many carbonaceous chondrites were initially classified as C2 in early newsletters. These are mostly CM2, based on matrix properties, chondrules abundance and sizes, and therefore all these samples have been reclassified more specifically here as CM2. |
Antarctic Meteorite Images for Sample QUE 94582 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE94582 | |
Lentfort, S., Bischoff, A., Ebert, S., and Patzek, M., 2021, Classification of CM chondrite breccias-Implications for the evaluation of samples from the OSIRIS-REx and Hayabusa 2 missions. Meteoritics & Planetary Science, 56, 127-147, doi: 10.1111/maps.13486. | |
Rochette, P., Kohout, T., Pesonen, L., Quirico, E., Sagnotti, L., Skripnik, A., Gattacceca, J., Bonal, L., Bourot-Denise, M., Chevrier, V., Clerc, J. P., Consolmagno, G., Folco, L., Gounelle, M., 2008, Magnetic classification of stony meteorites: 2. Non-ordinary chondrites. Meteoritics & Planetary Science, 43, 959-980, http://dx.doi.org/10.1111/j.1945-5100.2008.tb01092.x. |