Sample Petrographic Description
Sample Number | QUE 94570 |
Newsletter | 19,1 |
Location | Queen Alexandra Range |
Field Number | 10202 |
Dimensions (cm) | 5.0 x 3.6 x 1.8 |
Weight (g) | 57.15 |
Original Classification | C4 Chondrite |
Updated Classification | L4 Chondrite (Anomalous) |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 10-13;Ferrosilite (mol%): 9-12 | |
Weathering | |
B/Ce | |
Fracturing | |
A | |
Macroscopic Description - Roberta Score | |
Thin, extremely weathered, iridescent fusion crust remains on half of this angular specimen. Black weathered material makes up the interior. Small, silver-colored blebs of sulfides are scattered across the broken face. Evaporite deposit is present. | |
Thin Section Description (,2) - Brian Mason | |
The section shows a close-packed aggregate of chondrules, up to 2.4 mm across, in a small amount of dark matrix. About 20% of the nickel-iron and troilite is present, much of it rimming the chondrules. Weathering is extensive, with veins of brown limonite throughout the section. Microprobe analyses show olivine and pyroxene of fairly uniform composition: olivine, Fa10-13, Fs9-12. This meteorite is very similar to Coolidge (Meteoritics, v. 30, p. 20, 1995), and is tentatively classified as a C4 chondrite. | |
Reclassification Notes (AMN 33,1) | |
This is a reduced L chondrite - see Kallemeyn (1998) MaPS 33, A80. |
References for Sample QUE94570 | |
McCoy, T.J., 2015, Meteorite Misfits: Fuzzy Clues to Solar System Processes. In Righter, K., Corrigan, C.M., McCoy, T.J., and Harvey, R.P. Meteorites: A Pictorial Guide to the Collection, First Edition, AGU Wiley, pp. 145-152. | |
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. |