Name: Miller Range 11291 This is an OFFICIAL meteorite name. Abbreviation: MIL 11291 Observed fall: No Year found: 2011 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 102.1 g
The exteriors have shiny black fractured fusion crust. Areas without fusion crust are a dark gray with some black grains and white inclusion. The interiors are light to medium gray matrix and have abundant small black grains and white inclusions.
Thin Section Description (,2) - Cari Corrigan, and Andrew Beck
These meteorites are dominated by fragments of fine-grained basaltic material, with grains ranging from ~50-150 microns, set in a matrix of comminuted pyroxene. A large basaltic clast (4 mm x 5 mm) makes up approximately 30% of the MIL 11291 section. In this clast, the pyroxene and plagioclase grains are both rounded and euhedral and grain sizes are approximately equal. Mineral compositions are homogeneous with orthopyroxene (Fs62Wo2), with lamellae of augite (Fs25Wo45), and plagioclase (An87-89Or0-1). The Fe/Mn ratio of the pyroxene is ~29-30. These meteorites are brecciated eucrites.
JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022) 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)
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