Sample Petrographic Description
Sample Number | MIL 03356 |
Newsletter | 27,3 |
Location | Miller Range |
Field Number | 13970 |
Dimensions (cm) | 7.5 x 4.5 x 3.0 |
Weight (g) | 443.50 |
Original Classification | Iron-IVA |
Weathering | |
A | |
Fracturing | |
A | |
Macroscopic Description - Tim McCoy, Lisa Collins | |
This slipper-shaped meteorite has a smooth exterior surface partially (30-50%) covered by fusion crust which exhibits prominent flow lines. Prominent fracturing, which follows the Widmänstatten structure, extends to the interior along the end opposite the nose. An interesting feature is the presence of two holes, about 1 mm in diameter and of depth equal to or greater than the diameter, one of which contains a single euhedral metal crystal. | |
Thin Section Description - Tim McCoy, Linda Welzenbach | |
The meteorite was examined from a cut and etched surface, which bisected the larger end or nose of the specimen. The surface exhibits prominent kamacite lamellae (L/W ~20) with bandwidths less than 0.2-0.3 mm set in approximately 40-50% plessite fields. Rare, very small troilite inclusions, up to 1mm are present. An elongate needle, 2.5 mm long, of chromite(?) is also present. The meteorite appears to have been extensively shocked and exhibits α2 structure throughout the meteorite and prominent Neumann bands in many of the kamacite lamellae. A thin fusion crust is preserved over much of the surface, and a heat altered zone approximately 0.5 mm thick underlies that fusion crust. The meteorite is similar to the IVA iron Duchesne. |
Antarctic Meteorite Images for Sample MIL 03356 | ||||
Lab Photo(s) : | ||||
References for Sample MIL03356 | |
Hallis, L. J., 2013, Alteration assemblages in the Miller Range and Elephant Moraine regions of Antarctica: Comparisons between terrestrial igneous rocks and Martian meteorites. Meteoritics & Planetary Science, 48, 165-179, http://dx.doi.org/10.1111/maps.12049. |