Sample Petrographic Description
Sample Number | LAR 12099 |
Newsletter | 36,2 |
Location | Larkman Nunatak |
Field Number | 22610 |
Dimensions (cm) | 2.5 x 1.8 x 1.0 |
Weight (g) | 7.01 |
Original Classification | CO3 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 0-52 | |
Weathering | |
A/Be | |
Fracturing | |
A/B | |
Macroscopic Description - Cecilia Satterwhite | |
Black/brown fusion crust covers the exterior with some evaporites present. Some brown rusty areas are visible as are fractures. Interior is a black matrix with abundant lighter inclusions; some with minor oxidation. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
The section consists of abundant small (up to 1 mm) chondrules, chondrule fragments and mineral grains in a dark matrix. Very little metal is present and only minor sulfides occur within the matrix. Olivine ranges in composition from Fa0-52, with a continuous range of intermediate compositions and a slight peak at Fa1-2. The matrix appears to consist largely of Fe-rich olivine. The meteorite is a CO3 chondrite. |
Antarctic Meteorite Images for Sample LAR 12099 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 12099 | ||||
Thin Section Photo(s) : | ||||