Sample Petrographic Description
Sample Number | QUE 93639 |
Newsletter | 18,2 |
Location | Queen Alexandra Range |
Field Number | 7809 |
Dimensions (cm) | 1.8 x 1.0 x 0.6 |
Weight (g) | 1.61 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.7 Chondrite Oxidized A |
Pairing | QUE 93639; QUE 94688; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-17;Ferrosilite (mol%): 1-11 | |
Weathering | |
Ae | |
Fracturing | |
A | |
Macroscopic Description - Robbie Marlow | |
Ten percent of this meteorite is covered with frothy black patches of fusion crust. Trace amounts of evaporite deposit are visible on the exterior. The interior matrix is dark gray and fine grained with abundant white inclusions. | |
Thin Section Description (,2) - Brian Mason | |
The section shows numerous chondrules and irregular aggregates, up to 1.5 mm across, in a black matrix. A small amount of nickel-iron and troilite is present at the rims and within the chondrules. Microprobe analyses show that most of the olivine in the chondrules is close to Mg2SiO4 in composition, but ranges up to Fa17; pyroxene composition is Fs1-11. The matrix appears to consist largely of iron-rich olivine, about Fa50. The meteorite is classified as a C3 chondrite of the Vigarano subtype; it is very similar to QUE93429, with which it is probably paired. | |
Reclassification Notes (AMN 46,1) | |
Reclassification and pairing based on Raman spectroscopy (petrologic type 3.7), and on Ni content of metal and sulfide and magnetic susceptibility (Oxidized A). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |
Antarctic Meteorite Images for Sample QUE 93639 | ||||
Thin Section Photo(s) : | ||||