Name: Miller Range 07666 This is an OFFICIAL meteorite name. Abbreviation: MIL 07666 Observed fall: No Year found: 2007 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 96.3 g
Macroscopic Description - Cari Corrigan and Linda Welzenbach
This lozenge-shaped meteorite is flight oriented with a slight melt flange on the top side. The bottom or flight surface is finely pitted, the top side smoother but with sporadic, deeper regmaglypts. Fusion crust is 100% and exhibits mild oxidation in the form of iridescence and minor halos.
Thin Section Description - Tim McCoy, Cari Corrigan and Linda Welzenbach
The meteorite was examined from a cut and etched surface, which bisected one end or nose of the specimen. A thin fusion crust is preserved over most of the meteorite, and gradational heat alteration zone of approximately 1.0-2 mm thick underlies the fusion crust on the bottom or flight side, and is less than 0.3 mm thick on the top side. A prominent coarse α2 structure is found throughout. The section exhibits subequant grains ranging up to 1 mm in size which meet at 120° triple junctions throughout. The grains often exhibit sub-grain boundaries with subgrains of 100-200 microns decorated by taenite precipitates. One prominent fracture with iron oxides cross cuts the specimen following grain boundaries. Equant schreibersites up to ~300 microns are observed. A line scan across the meteorite suggests a composition of 5.4 wt.% Ni and 0.3 wt.% P. The meteorite is an iron. The composition suggests a tentative classification of IIAB.
96.3 g
