Sample Petrographic Description
Sample Number | RBT 04302 |
Newsletter | 29,2 |
Location | Roberts Massif |
Field Number | 15113 |
Dimensions (cm) | 2.5 x 2.0 x 1.0 |
Weight (g) | 11.61 |
Original Classification | CV3 Chondrite |
Updated Classification | CV 3.6 Chondrite Reduced |
Pairing | RBT 04133; RBT 04143; RBT 04302; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-9;Ferrosilite (mol%): 1 | |
Weathering | |
B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
Exterior has rough brown/black fusion crust on 10% of its surface. The interior is rusty black with some 1-2 mm chondrules of various colors. | |
Thin Section Description (,2) - Tim McCoy | |
The section exhibits large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa1-9, with most Fa1-5, and pyroxenes are Fs1. The meteorite is a CV3 chondrite. | |
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 RBT 04302 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample RBT 04302 | ||||
Thin Section Photo(s) : | ||||
References for Sample RBT04302 | |
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. | |
Bonal, L., Gattacceca, J., Garenne, A., Eschrig, J., Rochette, P., and Ruggiu, L.K., 2020, Water and heat: New constraints on the evolution of the CV chondrite parent body. Geochimica et Cosmochimica Acta, 276, 363–383. | |
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. |