Sample Petrographic Description
Sample Number | QUE 94688 |
Newsletter | 19,2 |
Location | Queen Alexandra Range |
Field Number | 10070 |
Dimensions (cm) | 2.2 x 1.8 x 1.1 |
Weight (g) | 10.55 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.7 Chondrite Oxidized A |
Pairing | QUE 93639; QUE 94688; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-33;Ferrosilite (mol%): 1 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
Dull black fusion crust covers sixty percent of the exterior of this carbonaceous chondrite. The interior reveals a black fine grained matrix with some weathered inclusions. White mm-sized inclusions are abundant on the exterior and interior surfaces. | |
Thin Section Description (,2) - Brian Mason | |
The section shows numerous chondrules (up to 1.8 mm across), irregular aggregates, and mineral grains in a black matrix. A small amount of nickel-iron and troilite is present at the rims and within the chondrules. Microprobe analyses show that most of the olivine in the chondrules is close to Mg2SiO4 in composition, but olivine grains in the matrix are more iron-rich, ranging up to Fa33; pyroxene is rare, a single grain measured was Fs1. The matrix appears to consist largely of iron-rich olivine, about Fa45. The meteorite is classified as a C3 chondrite of the Vigarano subtype; it is very similar to QUE93429, and the possibility of pairing should be considered. | |
Reclassification Notes (AMN 46,1) | |
Reclassification and pairing based on Raman spectroscopy (petrologic type 3.7), and on Ni content of metal and sulfide and magnetic susceptibility (Oxidized A). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |
Antarctic Meteorite Images for Sample QUE 94688 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 94688 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE94688 | |
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., Gattacceca, J., Garenne, A., Eschrig, J., Rochette, P., and Ruggiu, L.K., 2020, Water and heat: New constraints on the evolution of the CV chondrite parent body. Geochimica et Cosmochimica Acta, 276, 363–383. | |
Gattacceca, J., Bonal, L., Sonzogni, C., and Longerey, J., 2020, CV Chondrites: More than one parent body. Earth and Planetary Science Letters, 547, 116467, doi: 10.1016/j.epsi2020.116467. | |
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. | |
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. | |
Benoit, P. H., Sears, D. W. G., Akridge, J. M. C., Bland, P. A., Berry, F. J., Pillinger, C. T., 2000, The non-trivial problem of meteorite pairing. Meteoritics & Planetary Science, 35, 393-417. |