Sample Petrographic Description
Sample Number | LAR 12234 |
Newsletter | 39,1 |
Location | Larkman Nunatak |
Field Number | 23274 |
Dimensions (cm) | 3.2 x 2.3 x 2.0 |
Weight (g) | 35.56 |
Original Classification | L3.6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-25;Ferrosilite (mol%): 4 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Mitchell Haller | |
80% of the exterior has black fusion crust with some weathered areas. The interior is dark gray to black with large gray and weathered inclusions/chondrules (~3mm). | |
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 extensively weathered and stained. Silicates are unequilibrated; olivines range from Fa1-25 and pyroxene is Fs3Wo0.4. The meteorite is an L3 chondrite (estimated subtype 3.6). |
Antarctic Meteorite Images for Sample LAR 12234 | ||||
Thin Section Photo(s) : | ||||