Sample Petrographic Description
| Sample Number | QUE 99033 |
| Newsletter | 24,1 |
| Location | Queen Alexandra Range |
| Field Number | 11643 |
| Dimensions (cm) | 6.5 x 5.0 x 3.5 |
| Weight (g) | 164.18 |
| Original Classification | Howardite |
| Pairing | QUE 94200; QUE 97001; QUE 99033; QUE 99058; |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 43;Ferrosilite (mol%): 20-29 | |
| Weathering | |
| A/B | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Kathleen McBride | |
| The exterior of these two meteorites have a thin, patchy, brown/black fusion crust. The exposed interiors are gray in color with a few visible clasts. The interior matrix is gray in color with numerous angular to sub-angular multicolored clasts. | |
| Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
| These meteorites are so similar that a single description suffices. The sections show a groundmass of comminuted pyroxene and plagioclase (up to 2.5 mm) with fine- to coarse-grained basaltic and pyroxenitic clasts ranging up to 2 mm. Both contain clasts similar in texture to the unusual eucrite ALHA81001. Pyroxenes include orthopyroxene (Fs17-31Wo0-4) and finely-exsolved pyroxenes that include augite (Fs28Wo37) and orthopyroxene. The Fe/Mn ratio of pyroxene is ~30. Plagioclase is An70-95Or0-2. The meteorites are howardites. | |
| Notes | |
| Five howardites from the Queen Alexandra Range were initially unpaired. The relations between these five have been re-evaluated by Mittlefehldt et al. (2013). Based on petrography, mineralogy, petrology, bulk composition, and find locations, QUE 94200, 97001, 99033 and 99058 are paired together; QUE 97002 remains unpaired as before. AMN 45, no. 2. | |
| Antarctic Meteorite Images for Sample QUE 99033 | ||||
| Field Photo(s) : | ||||
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| Field photo image(s) courtesy of the ANSMET (ANtarctic Search for METeorites) Program, Case Western Reserve University and the University of Utah | ||||
| Antarctic Meteorite Images for Sample QUE 99033 | ||||
| Lab Photo(s) : | ||||
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| References for Sample QUE99033 | |
| Moriarty, D. P., Pieters, C. M., 2016, Complexities in pyroxene compositions derived from absorption band centers: Examples from Apollo samples, HED meteorites, synthetic pure pyroxenes, and remote sensing data. Meteoritics & Planetary Science, 51(2), 207-234. | |
| Mayne, R. G., Smith, S. E., Corrigan, C. M., 2016, Hiding in the howardites: Unequilibrated eucrite clasts as a guide to the formation of Vesta's crust. Meteorit Planet Sci, 51, 2387–2402, doi:10.1111/maps.12730. | |
| Mittlefehldt, D. W., 2015, Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites. Chemie der Erde - Geochemistry, 75 Issue 2, Jun-15, 155-183, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2014.08.002. | |
| Mittlefehldt, D. W., Herrin, J. S., Quinn, J. E., Mertzman, S. A., Cartwright, J. A., Mertzman, K. R., Peng, Z. X., 2013, Composition and petrology of HED polymict breccias: The regolith of (4) Vesta. Meteoritics & Planetary Science, 48, 2105-2134, http://dx.doi.org/10.1111/maps.12182. | |
| Warren, P. H., Kallemeyn, G. W., Huber, H., Ulff-Møller, F., Choe, W., 2009, Siderophile and other geochemical constraints on mixing relationships among HED-meteoritic breccias. Geochimica et Cosmochimica Acta, 73 Issue 19, 1-Oct-09, 5918-5943, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2009.06.030. | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples. | |