Sample Petrographic Description
Sample Number | QUE 97002 |
Newsletter | 21,2 |
Location | Queen Alexandra Range |
Field Number | 11043 |
Dimensions (cm) | 11.0 x 8.0 x 8.0 |
Weight (g) | 1384.30 |
Original Classification | Howardite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 54-60 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior of this achondrite has brown/black fusion crust with small glassy patches. Interior is a breccia, a light fine grained matrix with numerous clasts and an oxidation rind. Clasts are mostly white, elongated and angular. Angular dark gray clasts and black subrounded to angular clasts are visible. Some rusty patches are present. | |
Thin Section Description (,5) - Tim McCoy | |
The section is a microbreccia of coarse-grained clasts dominated by pyroxene with lesser plagioclase and fine-grained basaltic clasts. Individual clasts range up to 4 mm across. Shock effects are extensive. Most of the pyroxene is low-Ca with compositions ranging from Fs54Wo2 to Fs60Wo2. One augite grain of Fs21Wo44 was analyzed. Plagioclase ranges from An85-94. The Fe/Mn ratio in pyroxene is about 30. The meteorite is a howardite. | |
Reclassification Notes (AMN 45,2) | |
Although this meteorite was initially classified as a howardite, then reclassified to polymict eucrite, we now reclassify it back to howardite. Detailed analysis of the petrography, mineralogy, petrology, and bulk composition of QUE 97002 indicate that it is a howardite. It is not, however, paired with the other QUE howardites. For detailed assessment see Mittlefehldt et al. (2013). |
Antarctic Meteorite Images for Sample QUE 97002 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 97002 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE97002 | |
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. | |
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. | |
Cartwright, J. A., Ott, U., Mittlefehldt, D. W., Herrin, J. S., Herrmann, S., Mertzman, S. A., Mertzman, K. R., Peng, Z. X., Quinn, J. E., 2013, The quest for regolithic howardites. Part 1: Two trends uncovered using noble gases. Geochimica et Cosmochimica Acta, 105, 15-Mar-13, 395-421, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2012.11.047. | |
Schultz, L., Franke, L., 2004, Helium, neon, and argon in meteorites: A data collection. Meteoritics & Planetary Science, 39, 1889-1890, http://dx.doi.org/10.1111/j.1945-5100.2004.tb00083.x. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |