Newsletter |
24,1 |
Location |
Queen Alexandra Range |
Field Number |
11658 |
Dimensions (cm) |
5.0 x 2.5 x 2.5 |
Weight (g) |
48.00 |
Original Classification |
Howardite |
Pairing |
QUE 94200;
QUE 97001;
QUE 99033;
QUE 99058;
|
Ferrosilite (mol%): 17-31 |
A/B |
A |
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. |
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. |
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. |