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NWA 5205 (21.89gram)


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[ Meteoritical Bulletin Database ]


Classification: Chondrite LL3.2, S2-3/W3
Place/Time: 10.2007 in Morocco
Mass: 4kg

History and physical characteristics:Several dark brown stones with little remnant fusion crust were purchased in Erfoud in October 2007. TKW is ~ 4 kg.
Petrography (J. Wittke and T. Bunch, NAU):Polymict breccia with a wide range in chondrule size (0.3 to 11.1 mm). Several igneous-textured, non-chondritic enstatite objects (2 – 7.5 mm) are also present. A few very unusual FeS – Fe oxide- bearing veins (< one mm thick and > 2.8 cm in length) transcend a 6.5×2.6 cm slice. Chondrule mesostasis is nearly free of devitrification. Olivine in type II chondrules is strongly zoned. Weathering grade is W3 and the shock level is S2/3.
Mineral compositions: Type II PO olivine is Fa7.4 to 38.7, Cr2O3 = 0.07 to 0.48, peak at 0.28 wt %; FeO/MnO = 42 – 54. Enstatite in non-chondritic objects is Fs0.02Wo1.0.
The only other types LL3.2 listed in Met. Bulletin: NWA 2769, NWA 4497, NWA 4651