Sample Petrographic Description
| Sample Number | QUE 97053 |
| Newsletter | 22,1 |
| Location | Queen Alexandra Range |
| Field Number | 9823 |
| Dimensions (cm) | 4.5 x 3.5 x 3.5 |
| Weight (g) | 75.14 |
| Original Classification | Eucrite (Unbrecciated) |
| Mineral Composition (%Fa & %Fs) | |
| Ferrosilite (mol%): 41-49 | |
| Weathering | |
| A | |
| Fracturing | |
| A | |
| Macroscopic Description - Kathleen McBride | |
| The exterior of this broken piece has fusion crust on approximately 50% of its surface. The fusion crust is very black and shiny with striations. The exposed interior is fine-grained with black and white matrix and with medium brown inclusions. The interior has black and white granular crystals and dark grains of pyroxenes. Transparent to translucent plagioclase grains are visible. There is very minor rust or root beer colored grains near the exterior. | |
| Thin Section Description (,2) - Tim McCoy | |
| The section consists of mm-sized grains of pyroxene and plagioclase. Pyroxene is pigeonite to subcalcic augite in composition (Fs41.2-49 Wo6.5-24.5) with an Fe/Mn ratio of about 30. Many grains are twinned on a very fine scale with augite lamellae of <= 2um in width. Plagioclase has a composition of An79-89. Shock effects are pervasive, including mosaicism in pyroxene and undulatory extinction in plagioclase. The meteorite is an unbrecciated eucrite. | |
| Antarctic Meteorite Images for Sample QUE 97053 | ||||
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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 97053 | ||||
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| Antarctic Meteorite Images for Sample QUE 97053 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample QUE97053 | |
| Kumler, B., Day, J.M.D., 2021, Trace element variations generated by magmatic and post-crystallization processes in eucrite meteorites. , Geochimica et Cosmochimica Acta, 301 , 211–229 , https://doi.org/10.1016/j.gca.2021.03.002 . | |
| McCubbin, F.M., Lewis, J.A., Barnes, J.J., Elardo, S.M., and Boyce, J.W., 2021, The abundances of F, Cl, and H2O in eucrites: Implications for the origin of volatile depletion in the asteroid 4 Vesta. , Geochimica et Cosmochimica Acta, 314 , 270–293 , https://doi.org/10.1016/j.gca.2021.08.021 . | |
| Jourdan, F., Kennedy, T., Benedix, G.K., Eroglu, E., and Mayer C., 2020, Timing of the magmatic activity and upper crustal cooling of differentiated asteroid 4 Vesta. , Geochimica et Cosmochimica Acta, 273 , 205-225 , doi: 10.1016/j.gca.2020.01.036. | |
| 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 . | |
| Scott, E. R. D., Greenwood, R. C., Franchi, I. A., Sanders, I. S., 2009, Oxygen isotopic constraints on the origin and parent bodies of eucrites, diogenites, and howardites. , Geochimica et Cosmochimica Acta, 73 Issue 19 , 1-Oct-09 , 5835-5853 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2009.06.024 . | |
| Mayne, R. G., Mcsween Jr., H. Y, Mccoy, T. J., Gale, A., 2009, Petrology of the unbrecciated eucrites. , Geochimica et Cosmochimica Acta, 73 Issue 3 , 1-Feb-09 , 794-819 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2008.10.035 . | |
| Bogard, D. D., Garrison, D. H., 2003, 39Ar-40Ar ages of eucrites and thermal history of asteroid 4 Vesta. , Meteoritics & Planetary Science, 38 , 669-710 . | |
| Mittlefehldt, D. W., Lindstrom, M. M., 2003, Geochemistry of eucrites: genesis of basaltic eucrites, and Hf and Ta as petrogenetic indicators for altered antarctic eucrites. , Geochimica et Cosmochimica Acta, 67 Issue 10 , 15-May-03 , 1911-1934 , ISSN 0016-7037 , http://dx.doi.org/10.1016/S0016-7037(02)01411-4 . | |