Name: Larkman Nunatak 12011 This is an OFFICIAL meteorite name. Abbreviation: LAR 12011 Observed fall: No Year found: 2012 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 701 g
95% of the exterior surface has shiny black fusion crust with a rough, ropey texture. The interior matrix is a gray with black, white and transparent mineral grains. This shergottite is very similar in appearance to LAR 06319.
Thin Section Description (,2) - Cari Corrigan and Linda Welzenbach
This meteorite is composed of a fine-grained assemblage of pyroxene, olivine and maskelynite. Olivine occurs as phenocrysts with grain sizes up to 1 mm (smaller and more abundant than 12095 and 12240). Olivines have a brown staining probably due to shock. Pyroxene and maskelynite in the matrix are 200-400 microns in size. The maskelynites appear foliated in this section. Olivine is Fa23-58; pyroxenes exhibit a range of compositions from pigeonite to subcalcic augite (Fs24-44Wo3-27; Fe/Mn 26-35); plagioclase feldspar is intermediate in composition (An49-52Or3). This meteorite is an olivine-phyric shergottite but is different enough from LAR 12095 and LAR 12240 that it is not being paired here. It does, however, look very similar to LAR 06319.
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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