Sample Petrographic Description
Sample Number | QUE 94734 |
Newsletter | 19,2 |
Location | Queen Alexandra Range |
Field Number | 10025 |
Dimensions (cm) | 3.0 x 2.1 x 2.0 |
Weight (g) | 11.17 |
Original Classification | C2 Chondrite |
Updated Classification | CM2 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-31;Ferrosilite (mol%): 1-7 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
Fifty percent of the exterior of this carbonaceous chondrite is covered with fractured black fusion crust. Flow lines are present on the fusion crust on some surfaces. Areas without fusion crust are dull and brownish gray in color. The interior reveals a black fine grained matrix with mm-sized gray inclusions. | |
Thin Section Description (,2) - Brian Mason | |
The section shows sparse chondrules, up to 0.9 mm across, some irregular aggregates, and numerous small silicate grains in a dark brown to black matrix. The silicate grains are almost entirely olivine near Mg2SiO4 in composition, with a few more iron-rich grains. A little pyroxene near MgSiO3 in composition is present. The matrix appears to consist largely of iron-rich serpentine. The meteorite is 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 94734 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 94734 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE94734 | |
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. |