| Pairing |
|
| Newsletter |
31,2 |
| Location |
Miller Range |
| Field Number |
18646 |
| Dimensions |
2.1 x 2.0 x 2.0 |
| Weight |
42.441 |
| Original Classification |
Iron (IAB-IIICD) |
| Macroscopic Description - Cari Corrigan and Linda Welzenbach |
| This roughly spherical meteorite is heavily pitted with one end appearing to be broken. The exterior surface has a prominent fusion crust with rust halos associated with pitting. Some pits have a distinctive linear aspect that suggests a Widmanst¨aut;tten structure. |
| Thin Section Description - Tim McCoy, Cari Corrigan and Linda Welzenbach |
| The meteorite was examined from a cut and etched surface, which bisects the specimen. The meteorite appears to have been heavily shocked and exhibits a2 structure throughout, with abundant Neumann bands and little Widmanst¨aut;tten pattern preserved. A heat altered zone ~800 microns thick underlies a small amount of highly weathered fusion crust. The meteorite is polycrystalline with large kamacite grains up to 2 mm wide (L/W ~5) separated by thin ribbons of zoned taenite which reach up to 100 microns in width and which have been preferentially weathered producing veins of hydrated iron oxides cross-cutting the specimen. Scattered pockets of graphite, in many cases mixed with hydrated iron oxides of terrestrial origin, are found throughout the meteorite. A line scan across the meteorite suggests a composition of 7.0 wt.% Ni and 0.2 wt.% P. The meteorite is an iron. The composition and bandwidth suggest a tentative classification of IAB-IIICD. |
