Sample Petrographic Description
Sample Number | LAR 06874 |
Newsletter | 31,1 |
Location | Larkman Nunatak |
Field Number | 19454 |
Dimensions (cm) | 3.5 x 2.5 x 2.5 |
Weight (g) | 42.22 |
Original Classification | CK5 Chondrite |
Pairing | LAR 06868; LAR 06871; LAR 06874; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 29;Ferrosilite (mol%): 25 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The fusion crust on the exteriors of these meteorites is brown/black with polygonal fractures. The interiors are gray to black matrix, fine grained with some evaporites. Inclusions/chondrules are light colored. | |
Thin Section Description (,2) - Tim McCoy, Cari Corrigan, Linda Welzenbach | |
The sections consist of large (up to 2 mm) chondrules in a matrix of finer-grained silicates, sulfides and magnetite. The meteorites are extensively shock blackened. Silicates are homogeneous. Olivine is Fa29-31 and orthopyroxene is Fs25-26 across the pairing group. The meteorites are CK5 chondrites |
Antarctic Meteorite Images for Sample LAR 06874 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAR06874 | |
Hiroi, T., Ohtsuka, K., Howard, K.T., Robertson, K.R., and Milliken, R.E., Kaiden, H., Imae, N., Misawa, K., Kojima, H., Sasakia, S., Matsuokaa, M., Nakamura, T., Bish, D.L., 2021, UV-visible-infrared spectral survey of Antarctic carbonaceous chondrite chips. Polar Science, 29, 100723, https://doi.org/10.1016/j.polar.2021.100723. | |
Goderis, S., Brandon, A. D., Mayer, B., & Humayun, M. , 2017, Osmium isotopic homogeneity in the CK carbonaceous chondrites. . Geochimica et Cosmochimica Acta, 216, 8-27, https://doi.org/10.1016/j.gca.2017.05.011. | |
Kubuki, S., Iwanuma, J., Akiyama, K., Isa, M., Shirai, N., Ebihara, M., and Nishida, T., 2012, Reclassification of CK chondrites confirmed by elemental analysis and Fe-Mössbauer spectroscopy, Hyperfine Interactions, 208, 75-78, DOI 10.1007/s10751-011-0427-0. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |