Sample Petrographic Description
Sample Number | QUE 97004 |
Newsletter | 21,2 |
Location | Queen Alexandra Range |
Field Number | 9220 |
Dimensions (cm) | 3.0 x 3.0 x 1.5 |
Weight (g) | 13.91 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 59 | |
Weathering | |
A | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
Black, glassy, vesicular fusion crust is on the exterior of this achondrite. The fusion crust on the bottom surface is very thick and shiny. Two areas are lacking fusion crust. The interior has a granular or gritty texture. The matrix is off white in color with clasts of numerous colors and sizes, plagioclase, pyroxene, olivine, FeMg minerals and some metal grains are all present. Some rusty patches are present. | |
Thin Section Description (,5) - Tim McCoy | |
The section is a microbreccia of pyroxene and plagioclase clasts and mineral fragments. Much of the section exhibits a granoblastic texture. Pyroxene compositions are quite homogeneous, with low-Ca pyroxene of Fs59Wo6 and augite of Fs30Wo40. Plagioclase ranges from An85-91. The Fe/Mn ratio in pyroxene is about 30. The meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample QUE 97004 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 97004 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE97004 | |
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. | |
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. |