Name: Miller Range 090075 This is an OFFICIAL meteorite name. Abbreviation: MIL 090075 Observed fall: No Year found: 2009 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 143.5 g
40% of the exterior of this sample is covered with a shiny olive green fusion crust. The remaining 60% is broken surface which consists of dark green to gray fine-grained matrix with elongate and equant pale green clasts that range in size from 2-7 mm. White clasts ranging in size from 1-2 mm are present within the pale green clasts. Some evaporite material is encrusted on the broken surface. The interior of this sample consists of a dark green, fine-grained matrix with 3-5 mm gray clasts throughout.
Thin Section (,2) Description - Cari Corrigan, Tim McCoy and Linda Welzenbach
The sections consist of an extremely fine-grained matrix with isolated mineral grains and fine- to coarse-grained basaltic clasts in all size ranges up to 2 mm. Microprobe analyses reveal olivine of Fa37-42, pyroxene in a wide range of compositions from pigeonite Fs20-43Wo6-19 to augite of Fs9Wo43 with intermediate and more FeO-rich compositions, and plagioclase of An89-98. The Fe/Mn ratio of the pyroxene averages ~59. These meteorites were found 10 cm apart in the field and are similar enough that only one description is necessary. They are likely paired. The meteorite(s) is/are a basalt-bearing anorthositic regolith breccia.
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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143.5 g
