Sample Petrographic Description
Sample Number | LAR 12244 |
Newsletter | 40,1 |
Location | Larkman Nunatak |
Field Number | 23296 |
Dimensions (cm) | 5.5 x 4.0 x 2.5 |
Weight (g) | 131.20 |
Original Classification | EH3 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-3 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Rachel Funk | |
80% of the exterior is covered with dark brown glossy fusion crust with minor amounts of orange rust visible. The dark gray groundmass has 1-2 mm sized gray chondrules and 1 mm sized white inclusions. Orange rust and shiny metals are visible throughout. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
The section shows an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Chondrules contain minor abundances of olivine. Weathering is severe. Microprobe analyses show the pyroxene is Fs0-3 and that the Fe,Ni metal contains 3 wt. % Si. The meteorite is an EH3 chondrite. |
Antarctic Meteorite Images for Sample LAR 12244 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12244 | ||||
Thin Section Photo(s) : | ||||