Sample Petrographic Description
Sample Number | LAR 12279 |
Newsletter | 40,1 |
Location | Larkman Nunatak |
Field Number | 23999 |
Dimensions (cm) | 5.0 x 4.5 x 3.0 |
Weight (g) | 76.90 |
Original Classification | EL6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 0-1 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Rachel Funk | |
The exterior of this meteorite is covered with dark brown fusion crust, some fractures and rust is visible. The interior is a dark matrix with metal and minor amounts of rust visible. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
Only vague traces of chondritic structure are visible in the thin section, which shows the meteorite to consist largely of prismatic or granular enstatite (grain size 0.1-0.2 mm), a considerable amount of nickel-iron, and minor amounts of sulfides and plagioclase. The meteorite is modestly weathered, with brown limonitic staining throughout the section. Microprobe analyses show that the enstatite is Fs0-1; the Fe-Ni metal contains 1.0 wt. % Si. The meteorite is an EL6 chondrite. |
Antarctic Meteorite Images for Sample LAR 12279 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12279 | ||||
Thin Section Photo(s) : | ||||