Sample Petrographic Description
Sample Number | QUE 99122 |
Newsletter | 24,2 |
Location | Queen Alexandra Range |
Field Number | 11613 |
Dimensions (cm) | 3.0 x 2.0 x 1.5 |
Weight (g) | 19.94 |
Original Classification | Enstatite Meteorite Ungr |
Pairing | QUE 94204; QUE 97289; QUE 97348; QUE 99059; QUE 99122; QUE 99157; QUE 99158; QUE 99387; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-1 | |
Weathering | |
C | |
Fracturing | |
C | |
Macroscopic Description - Kathleen McBride | |
10% of the exterior of these meteorites are covered with patchy brown-black fusion crust. The interiors reveal rusty crystalline material that crumbles easily. These meteorites are too rusty to observe any visible inclusions. | |
Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
These meteorites are so similar that a single description suffices. The section consists of mm-sized enstatite grains (Fs0-1), SiO2, zoned plagioclase (An7-31), potassium feldspar, metal, troilite, daubreelite, alabandite and schreibersite. The latter phases often occur as rounded enclaves in the enstatite. These meteorites are paired with the QUE 99059/94204/97348/97289 grouping. Unlike these earlier members, which contained either plagioclase or SiO2, these three contain both phases. These meteorites are unusual aubrites or enstatite chondrite impact melt rocks. |
Antarctic Meteorite Images for Sample QUE 99122 | ||||
Thin Section Photo(s) : | ||||