Sample Petrographic Description
Sample Number | LAR 04317 |
Newsletter | 28,2 |
Location | Larkman Nunatak |
Field Number | 15551 |
Dimensions (cm) | 2.0 x 2.0 x 1.0 |
Weight (g) | 10.36 |
Original Classification | CK4 Chondrite |
Pairing | LAR 04317; LAR 04318; |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 31-32 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
~90% of the exterior surface is covered with thick brown/black fusion crust with polygonal fractures. The interiors are composed of gray matrix with large chondrules and are very hard. | |
Thin Section Description (,3, 4) - Tim McCoy | |
These meteorites are so similar that a single description suffices. The sections consist of large (up to 2 mm) chondrules and isolated mineral grains in a matrix of finer-grained silicates, sulfides and very abundant magnetite. Olivine is Fa29-32 and calcic pyroxene is Fs10Wo45. The meteorites are CK4 chondrites. |
Antarctic Meteorite Images for Sample LAR 04317 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 04317 | ||||
Thin Section Photo(s) : | ||||