Sample Petrographic Description
Sample Number | EET 96003 |
Newsletter | 21,1 |
Location | Elephant Moraine |
Field Number | 10620 |
Dimensions (cm) | 3.5 x 2.0 x 1.5 |
Weight (g) | 15.64 |
Original Classification | Howardite |
Pairing | EET 96003; EET 96004; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 21-45 | |
Weathering | |
A | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
These achondrites are covered with a black patchy fusion crust with a shiny luster and some glassy appearing areas. Fusion crust covers 50% of the exterior surfaces. The interior is a dull, powdery gray matrix with numerous tan and white angular to sub-angular inclusions, mm size in diameter. | |
Thin Section Description (,4) - Brian Mason | |
The sections are so similar that a single description will suffice; the meteorites are probably paired. The sections show a groundmass of comminuted pyroxene and plagioclase (average grain size 0.1 mm), with a few larger clasts (up to 2 mm) of these minerals. Section 96003,4 has a coarse-grained gabbroic clast 6 mm across. Microprobe analyses show that most of the pyroxene is hypersthene (Wo1-5, Fs31-45); one grain of augite, Wo38Fs21, was analyzed, and a few grains of intermediate composition. Plagioclase composition is An82-95. The meteorites are howardites. |
Antarctic Meteorite Images for Sample EET 96003 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample EET 96003 | ||||
Thin Section Photo(s) : | ||||
References for Sample EET96003 | |
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. |