Dhofar 2118 (Dho 2118)        19°23.936’N, 54°04.320’E

Zufar, Oman

Find: 19 Jan 2018

Classification: Ureilite

History: A single meteorite was found during a search for meteorites.

Physical characteristics: Part of an individual with ablated surface, regmaglypts and traces of fusion crust, 16x13x12 cm.

Petrography: (J. Pape, E. Gnos, B. Hofmann) The sample consist mainly of olivine with minor pigeonite both with slight preferred grain orientation and shows the characteristic ureilitic texture. Typical grain size is 1-2 mm. Large areas of olivine rims are strongly reduced (width 100-200 μm) and contain abundant tiny metal blebs that are largely oxidized due to terrestrial weathering. Carbon platelets (up to 2 mm length) consist mainly of diamond and minor microcrystalline graphite. Silicates are weakly shocked (S2). Weathering moderate (most iron oxidized, silicates are unaffected).

Geochemistry: (J. Pape, NMBE) Olivine cores Fa_20.6±0.8, Fe/Mn 40±3, Cr₂O₃ 0.78±0.04 wt% (N = 14), reduced Ol rims have Fa>2.0. Pigeonite has Fs_18.8±0.1Wo_5.6±0.1, Cr₂O₃ 1.10±0.04 wt% (N = 13).

Classification: Based on texture, mineralogy and geochemistry this is an unbrecciated, monomict, ferroan ureilite. Paired with Dhofar 2115.

Specimens: All at NMBE, including one polished thin section.