Sample Petrographic Description
Sample Number | QUE 93429 |
Newsletter | 18,1 |
Location | Queen Alexandra Range |
Field Number | 10588 |
Dimensions (cm) | 2.0 x 1.7 x 1.0 |
Weight (g) | 7.76 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.6 Chondrite Reduced |
Pairing | QUE 93429; QUE 93744; QUE 94366; QUE 94546; QUE 97186; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0-10;Ferrosilite (mol%): 1-6 | |
Weathering | |
B/Ce | |
Fracturing | |
B | |
Macroscopic Description - Carol Schwarz | |
Fusion crust is dull, black, and has a rough texture. The interior matrix is dark gray/black and fine-grained. Some metal is present. Evaporite deposit is abundant; it is mostly white along the edge of the fusion crust and red-brown or yellowish in the interior. | |
Thin Section Description (,2) - Brian Mason | |
The section shows numerous chondrules and irregular aggregates, up to 2.4 mm across, in a black matrix. A minor amount of fine-grained metal and troilite is present, mainly concentrated within chondrules. Brown limonitic staining pervades the section. Microprobe analyses show that most of the olivine in the chondrules is close to Mg2SiO4 in composition, but ranges up to Fa10; pyroxene composition is Fs1-6. The matrix appears to consist largely of iron-rich olivine, about Fa50. The meteorite is classified as a C3 chondrite of the Vigarano subtype. | |
Reclassification Notes (AMN 46,1) | |
Reclassification and pairing based on Raman spectroscopy (petrologic type 3.6), and on Ni content of metal and sulfide and magnetic susceptibility (Reduced). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |
Antarctic Meteorite Images for Sample QUE 93429 | ||||
Thin Section Photo(s) : | ||||
References for Sample QUE93429 | |
Righter, K., Neff, K. E., 2007, Temperature and oxygen fugacity constraints on CK and R chondrites and implications for water and oxidation in the early solar system. Polar Science, 1 Issue 1, Aug-07, 25-44, ISSN 1873-9652, http://dx.doi.org/10.1016/j.polar.2007.04.002. | |
Schultz, L., Franke, L., 2004, Helium, neon, and argon in meteorites: A data collection. Meteoritics & Planetary Science, 39, 1889-1890, http://dx.doi.org/10.1111/j.1945-5100.2004.tb00083.x. | |
Krot, A. N., Hutcheon, I. D., Keil, K., 2002, Plagioclase-rich chondrules in the reduced CV chondrites: Evidence for complex formation history and genetic links between calcium-aluminum-rich inclusions and ferromagnesian chondrules. Meteoritics & Planetary Science, 37, 155-182. | |
Scherer, P., Schultz, L., 2000, Noble gas record, collisional history, and pairing of CV, CO, CK, and other carbonaceous chondrites. Meteoritics & Planetary Science, 35, 145-153. | |
Clayton, R. N., Mayeda, T. K., 1999, Oxygen isotope studies of carbonaceous chondrites. Geochimica et Cosmochimica Acta, 63 Issues 13-14, Jul-99, 2089-2104, ISSN 0016-7037, http://dx.doi.org/10.1016/S0016-7037(99)00090-3. | |
Krot, A. N., Petaev, M. I., Scott, E. R. D., Choi, B.-G., Zolensky, M. E., Keil, K., 1998, Progressive alteration in CV3 chondrites: More evidence for asteroidal alteration. Meteoritics & Planetary Science, 33, 1065-1085. | |
Krot, A. N., Scott, E. R. D., Zolensky, M. E., 1995, Mineralogical and chemical modification of components in CV3 chondrites: Nebular or asteroidal processing?. Meteoritics, 30, 748-775. |