Sample Petrographic Description
Sample Number | QUE 97632 |
Newsletter | 23,1 |
Location | Queen Alexandra Range |
Field Number | 9008 |
Dimensions (cm) | 1.0 x 1.0 x 0.5 |
Weight (g) | 0.80 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 61 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
100% of the exterior of this achondrite is covered by brown/black fusion crust with oxidation halos. The interior is a dark gray matrix with minor rust. Light gray clasts are visible and range in size from 1-2 mm in diameter. | |
Thin Section Description (,2) - Tim McCoy | |
The section contains a fine-grained (~50 micron average grain size) brecciated matrix with ophitic clasts up to 1 mm in diameter with grain sizes ~300 microns. Mineral compositions are homogeneous with orthopyroxene (Fs61Wo2), with lamellae of augite (Fs>27Wo44), and plagioclase (An81Or). The Fe/Mn ratio of the pyroxene is ~30. The meteorite exhibits significant shock effects, including shock veins. The meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample QUE 97632 | ||||
Thin Section Photo(s) : | ||||