Name: Grosvenor Mountains 17102 This is an OFFICIAL meteorite name. Abbreviation: GRO 17102 Observed fall: No Year found: 2017 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 4.96 kg
Macroscopic Description - Cari Corrigan, Nicole Lunning, Tim McCoy
This cone-shaped mass is ~12x12x10 cm. The rounded upper surface exhibits a pitted surficial layer overlying a smoother undersurface. Areas up to 3 x 8 cm are primarily this smoother undersurface suggestive of multiple generations of fusion crust formation. The underside is partially bound by a lip of fusion crust and is somewhat flattened but irregular with indentations up to 3 cm in dimension. Overall the meteorite has the appearance of an oriented individual.
Thin Section Description (,2) - Cari Corrigan, Nicole Lunning, Tim McCoy
This thick section exhibits a poorly developed Widmanstätten pattern with short, stubby kamacite lamellae (l/w=3-4). Kamacite lamellae often contain horsetail graphite in the direction of elongation of the lamellae. Coarse schreibersite and taenite up to 0.5 mm in width with plessitic interiors present. Inclusions of sphalerite are found as minor phases. Weathering is pervasive on the edges of the meteorite. No fusion crust was observed, but α2 structure extends ~2 mm into the section. Compositionally, this iron has 8.0 wt.% Ni, and 0.08 wt.% P, determined from microprobe transects. The composition, structure and inclusions suggest that this meteorite is a IAB iron.
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):
4.96 kg
