Name: Larkman Nunatak 12138 This is an OFFICIAL meteorite name. Abbreviation: LAR 12138 Observed fall: No Year found: 2012 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 184.7 g
Macroscopic Description - Cari Corrigan and 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 and 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.
JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022) SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):
184.7 g
