Sample Petrographic Description
Sample Number | QUE 93018 |
Newsletter | 18,2 |
Location | Queen Alexandra Range |
Field Number | 7896 |
Dimensions (cm) | 1.5 x 1.1 x 0.8 |
Weight (g) | 1.34 |
Original Classification | C2 Chondrite |
Updated Classification | CM2 Chondrite |
Pairing | QUE 93005; QUE 93018; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-11 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Robbie Marlow | |
The exterior of this carbonaceous chondrite has patches of dull black fusion crust. Areas devoid of fusion crust are dull black and porous. The interior matrix is black and fine grained. One millimeter-sized dark clast is visible. | |
Thin Section Description (,2) - Brian Mason | |
The section shows rare chondrules up to 0.5 mm across, and numerous small silicate grains in a dark brown to black matrix. Most of the chondrules have been converted into brown serpentine. Trace amounts of nickel-iron and troilite are present as minute grains. Olivine is near Mg2SiO4 in composition, with a few more iron-rich grains. The matrix appears to consist largely of iron-rich serpentine. The meteorite is a C2 chondrite; it is very similar to QUE93005, with which it is probably paired. | |
Reclassification Notes (AMN 31,1) | |
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 93018 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample QUE 93018 | ||||
Thin Section Photo(s) : | ||||