Sample Petrographic Description
Sample Number | LAR 12060 |
Newsletter | 36,2 |
Location | Larkman Nunatak |
Field Number | 22263 |
Dimensions (cm) | 3.5 x 2.5 x 2.0 |
Weight (g) | 17.87 |
Original Classification | Eucrite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 27-63 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
Exterior has a rough, black fusion crust over 50% of its surface. The interior of this eucrite has a black and white granular texture with an occasional rust halo. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
This meteorite is dominated by fine-grained (~200 micron average) basaltic material which occurs as both the host and clasts within the meteorite. Occasional coarser-grained clasts, with grain sizes up to 0.5 mm, are observed. Mineral compositions include orthopyroxene (Fs63Wo2), with lamellae of augite (Fs27-29Wo41-44), and plagioclase (An75-97Or0-1). The Fe/Mn ratio of the pyroxene is ~29-32. The meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample LAR 12060 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12060 | ||||
Thin Section Photo(s) : | ||||