Sample Petrographic Description
Sample Number | MET 00761 |
Newsletter | 26,1 |
Location | Meteorite Hills |
Field Number | 13034 |
Dimensions (cm) | 1.75 x 1.5 x 1.5 |
Weight (g) | 5.98 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.6 Chondrite Oxidized B |
Pairing | MET 00429; MET 00430; MET 00634; MET 00742; MET 00747; MET 00761; MET 01074; MET 01080; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-12;Ferrosilite (mol%): 0-1 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior of these carbonaceous chondrites has 5-30% black, patchy fusion crust. The black interior has mm-sized light gray and white chondrules. Some rust is visible. | |
Thin Section Description (,2) - Tim McCoy | |
These meteorites were found within 2.5 km of each other and are so similar that a single description suffices. The sections exhibit large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa1-11, with many Fa1-5, and pyroxenes from Fs0-9. The meteorites are CV3 chondrites. | |
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 (Oxidized B). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. |
Antarctic Meteorite Images for Sample MET 00761 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample MET 00761 | ||||
Thin Section Photo(s) : | ||||
References for Sample MET00761 | |
Eschrig, J., Bonal, L., Beck, P., Prestgard, T.J., 2021, Spectral reflectance analysis of type 3 carbonaceous chondrites and search for their asteroidal parent bodies. Icarus, 354, 114034, https://doi.org/10.1016/j.icarus.2020.114034. | |
Gattacceca, J., Bonal, L., Sonzogni, C., and Longerey, J., 2020, CV Chondrites: More than one parent body. Earth and Planetary Science Letters, 547, 116467, doi: 10.1016/j.epsi2020.116467. | |
Bonal, L., Quirico, E., Flandinet, L., Montagnac, G., 2016, Thermal history of type 3 chondrites from the Antarctic meteorite collection determined by Raman spectroscopy of their polyaromatic carbonaceous matter. Geochimica et Cosmochimica Acta, 189, 312-337. |