Sample Petrographic Description
Sample Number | LAR 12265 |
Newsletter | |
Location | Larkman Nunatak |
Field Number | 23757 |
Dimensions (cm) | 2.8 x 2.5 x 1.0 |
Weight (g) | 14.26 |
Original Classification | CK6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 34;Ferrosilite (mol%): 11 | |
Weathering | |
B/C | |
Fracturing | |
B | |
Macroscopic Description - Mitchell Haller | |
55% of the exterior has black fusion crust with a porous texture on top. Areas without fusion crust are a dark gray color. The interior is a dark gray matrix with heavy oxidation in some areas. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section consists of large (up to 1.5 mm), poorly-defined chondrules in a matrix of finer-grained silicates, sulfides and abundant magnetite grains. The meteorite is only slightly weathered, but is extensively shock blackened. Silicates are homogeneous. Olivine is Fa34 and pyroxene is Fs11Wo48. The meteorite is a CK5 chondrite. |
Antarctic Meteorite Images for Sample LAR 12265 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12265 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAR12265 | |
Tanbakouei, S., Trigo-Rodriguez, J.M., Llorca, J., Moyano-Cambero, C.E., Williams, I.P., and Rivkin, A.S., 2021, The reflectance spectra of CV–CK carbonaceous chondrites from the near-infrared to the visible. Monthly Notices of the Royal Astronomical Society, 507, 651–662, https://doi.org/10.1093/mnras/stab2146. |