Sample Petrographic Description
Sample Number | QUE 94222 |
Newsletter | 19,1 |
Location | Queen Alexandra Range |
Field Number | 10010 |
Dimensions (cm) | 2.5 x 2.0 x 0.9 |
Weight (g) | 4.82 |
Original Classification | C2 Chondrite |
Updated Classification | CM2 Chondrite |
Pairing | QUE 94220; QUE 94222; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-29 | |
Weathering | |
Be | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
Black, weathered fusion crust covers fifty percent of the exterior of QUE94222. The broken surface has distinct, thick, rounded blebs of evaporite deposit. No fusion crust remains on 94220 but there is a minor amount of evaporite deposit on the exterior surface. The interior material of both of these carbonaceous chondrites is medium to dark gray. Small white and light gray inclusions are scattered throughout. | |
Thin Section Description (,2) - Brian Mason | |
The sections are so similar that a single description suffices; the meteorites are possibly paired. They show a few small chondrules, up to 0.5 mm across, some irregular aggregates, and numerous small mineral grains in a translucent brown isotropic matrix. The mineral grains are almost entirely olivine, near Mg2SiO4 in composition, with a few iron-rich grains. The matrix consist of iron-rich serpentine. The meteorites are C2 chondrites. | |
Reclassification Notes (AMN 33,1) | |
Many carbonaceous chondrites were initially classified as C2 in early newsletters. These are mostly CM2, based on matrix properties, chondrules abundance and sizes, and therefore all these samples have been reclassified more specifically here as CM2. |
Antarctic Meteorite Images for Sample QUE 94222 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 94222 | ||||
Thin Section Photo(s) : | ||||