Sample Petrographic Description
Sample Number | LAR 12138 |
Newsletter | 38,1 |
Location | Larkman Nunatak |
Field Number | 23175 |
Dimensions (cm) | 5.0 x 3.0 x 2.5 |
Weight (g) | 184.74 |
Original Classification | IRON-IVB |
Macroscopic Description - Cari Corrigan, Tim McCoy | |
This meteorite is generally rounded with a brown surface that exhibits minor rust haloes. The meteorite also shows deep pits, including some that are elongated, in the bottom of which are what appear to be schreibersite or troilite. On the cut surface opposite that used for classification, are skeletal schreibersites. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
A 2.1 x 2.5 cm slice of this meteorite was examined. Small areas of fusion crust are present in re-entrants on the edge of the meteorite. The bulk of the meteorite is composed of taenite with needlelike lamellae of kamacite and rare schreibersite rimmed by high-Ni taenite. The kamacite lamellae are up to 1 mm in length and are typically 50 microns in width. The average composition based on a microprobe traverse of 100 points is 19.9% Ni, 0.1% P. The meteorite is likely a IVB iron. |
Antarctic Meteorite Images for Sample LAR 12138 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12138 | ||||
Thin Section Photo(s) : | ||||