Sample No.: QUE93069

Location: Queen Alexandra Range

Dimensions (cm): 5.0 x 2.2 x 2.3

Weight (g): 21.4

Weathering: A/B

Fracturing: B

Meteorite Type: Lunar-anorth. breccia

Macroscopic Description: Cecilia Satterwhite and Marilyn Lindstrom

The overall shape of this lunar meteorite is approximately one third of a flat ovoid. Thick gray-green frothy fusion crust covers the top while thin granular medium olive green-brown fusion crust covers the bottom. The north face is a fractured surface with exposed interior matrix and abundant fractures. This surface consists of black matrix with abundant millimeter sized white/ gray clasts. Some clasts have weathered to a yellowish color. One gray clast is visible in a fracture. Cleaving this meteorite revealed a lighter gray matrix with small clasts of various sizes. One white, friable clast (3 x 2 mm) is directly below the fusion crust. An area 2 x 2 mm near this clast has a uniform, dusty-gray appearance with an indistinguish-able border. All of the clasts present are small and friable and unfortunately may not be extractable.

Thin Section (.5) Description: Brian Mason

The section shows a microbreccia of small plagioclase grains and granular clasts, up to 0.6 mm across, in a translucent to semi-opaque brown glassy matrix; colorless vesicular fusion crust is present on one edge. There is one large clast, 2.4 x 3.6 mm, of pale brown partly devitrified glass. Traces of metallic iron, as irregular grains up to 40 microns, are present. Microprobe analyses show that the plagioclase is almost pure anorthite (Na2O 0.3-0.4%, K2O less than 0.1%). The composition of the fusion crust, probably a reasonable approximation for the bulk meteorite, is (weight percent): SiO2 44, Al2O3 27, FeO 4.4, MgO 4.5, CaO 16, Na2O 0.32, K2O less than 0.1 %, TiO2 0.24, MnO 0.10. The FeO : MnO ratio is high, 44-75, characteristic of lunar material. The meteorite is an anorthositic microbreccia, presumably of lunar origin. In thin section, it is very similar to MAC 88105 (Antarctic Meteorite Newsletter 12(2), 1989).