Sample Petrographic Description
Sample Number | LAR 12216 |
Newsletter | 39,1 |
Location | Larkman Nunatak |
Field Number | 23298 |
Dimensions (cm) | 3.5 x 2.6 x 1.0 |
Weight (g) | 16.28 |
Original Classification | L3.5 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 3-33;Ferrosilite (mol%): 13-18 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Mitchell Haller | |
Black fusion crust covers 60% of the exterior surface; the other surface is weathered brown with some chondrules visible. The interior is a reddish black matrix with dark gray inclusions/chondrules and some silvery metals. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section exhibits numerous large, well-defined chondrules (up to 2 mm) in a dark matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is present. The meteorite is moderately weathered. Silicates are unequilibrated; olivines range from Fa3-33 and pyroxene is Fs13-18Wo1. The meteorite is an L3 chondrite (estimated subtype 3.5). |
Antarctic Meteorite Images for Sample LAR 12216 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12216 | ||||
Thin Section Photo(s) : | ||||