Bir Ounane 004 Basic information Name: Bir Ounane 004 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2023 Country: Mali Mass:help 12.16 kg Classification history: Meteoritical Bulletin: MB 112 (2023) Achondrite-ung Recommended: Achondrite-ung [explanation] This is 1 of 154 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites Comments: Approved 3 Jan 2024 Writeuphelp Writeup from MB 112: Bir Ounane 004 21º51.8568’N, 3º16.7766’W Gao, Mali Find: 2023 Classification: Ungrouped achondrite History: Many samples weighing a total of 12.158 kg were found in Mali 3.5 Km NW of the Bir Ounane001 find. Salek Mrabih and Sidi al Arbi hold the main masses. Physical characteristics: Stone has a flattened irregular shape and lacks a fusion crust. The cut face is dark, orangish brown in color and shows a poikilitic texture. Petrography: Description and classification (A. Love, App) Sample shows poikiloblastic texture composed of: 0.5-mm to 1-cm sized clinoenstatite, olivine, augite, twinned plagioclase, FeNi metal and troilite. Olivine, augite and plagioclase occur as interstitial phases and as chadacrysts. Olivine also occurs in lumps of equigranular grains interstitial to clinoenstatite oikocrysts. Additional minerals are: troilite, schreibersite and daubréelite. Geochemistry: (A. Love, App) Olivine (Fa1.0±0.1, Fe/Mn=4.1±0.8, n=12); low Ca-pyroxene (Fs1.3±0.1Wo0.9±0.4, Fe/Mn=2.7±0.8 n=12); high Ca-pyroxene (Fs0.8±0.3Wo40.3±1.0, Fe/Mn=2.3±0.8 n=8); plagioclase (An36.9±8.1Or0.2_0.1, n=6). Classification: primitive achondrite (ungrouped) Based on petrographic characteristics, reduced mineral compositions and find coordinates, this sample is possibly paired to the ungrouped achondrites Bir Ounane 001 and 003. Specimens: Salek Mrabih (Dominion Meteors) holds the main masses. A polished thin section and an endcut weighing 21.4 g are on