Sample Petrographic Description
| Sample Number | LAR 06279 |
| Newsletter | 33,1 |
| Location | Larkman Nunatak |
| Field Number | 19898 |
| Dimensions (cm) | 9.5 x 6.5 x 4.0 |
| Weight (g) | 729.80 |
| Original Classification | LL3.8 Chondrite |
| Pairing | LAR 06279; LAR 06283; LAR 06320 |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 14-40;Ferrosilite (mol%): 6-19 | |
| Weathering | |
| B | |
| Fracturing | |
| A | |
| Macroscopic Description - Cecilia Satterwhite | |
| These chondrites all have black fusion crust with rusty areas and oxidation haloes. Areas without fusion crust are brown. The interior is a gray to black matrix with some oxidation and metal. Inclusions and chondrules are visible on the exterior as well as the interior and are lighter than the matrix and vary in size. | |
| Thin Section Description (,2) - Cari Corrigan, Tim McCoy, Linda Welzenbach | |
| The sections exhibit numerous large, well-defined chondrules (up to 1.5 mm) and occasional melt clasts in a matrix of fine-grained silicates, metal, and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is abundant. Silicates are unequilibrated; olivines range from Fa2-44 and pyroxenes from Fs3-28. The meteorites are LL3 chondrites (estimated subtype 3.8). | |
| Antarctic Meteorite Images for Sample LAR 06279 | ||||
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| Field photo image(s) courtesy of the ANSMET (ANtarctic Search for METeorites) Program, Case Western Reserve University and the University of Utah | ||||
| Antarctic Meteorite Images for Sample LAR 06279 | ||||
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| Antarctic Meteorite Images for Sample LAR 06279 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample LAR06279 | |
| 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., 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 . | |