| Pairing |
|
| Newsletter |
32,2 |
| Location |
Larkman Nunatak |
| Field Number |
19283 |
| Dimensions |
2.5 x 3.0 x 2.25 |
| Weight |
29.01 |
| Original Classification |
Mesosiderite |
| Macroscopic Description - Kathleen McBride |
| Some brown/black fusion crust is on the exterior. The interior is a light gray matrix with a little metal and minor rust. Inclusions are dark gray to white in color. |
| Thin Section
(,2) Description - Cari Corrigan, Tim McCoy and Linda Welzenbach |
| This section consists of angular and basaltic fragments and individual grains of pyroxene, plagioclase, rare olivine, metal and sulfide set in a clastic matrix. Individual grains range up to 6 mm in size. Particularly prominent are sulfide-rich clasts that appear to have impact-melted textures. Pyroxene is exsolved, with compositions of Fs22-58 Wo1-43 and has Fe/Mn ratios of ~30. Olivine is Fa31. Plagioclase is An92Or1. The somewhat higher than normal abundance of metal and sulfide suggest that this could be a separated silicate clast from a mesosiderite. |
