NWA 6920 Howardite Ahondrite Meteorites for Sale
Location: Northwest Africa, exact location unknown.
Found: Year found, 2011.
Classification: HED achondrite (Howardite)
Description: Petrography: Breccia containing distinctive yellowish diogenite clasts, and calcic plagioclase has been partly to totally converted by shock to maskelynite. Relatively coarse-grained basaltic eucrite clasts and related debris are subordinate to diogenite clasts (of several types ranging up to unusually ferroan orthopyroxene compositions) plus related debris. Accessory minerals include chromite, silica polymorph, ilmenite and troilite. This specimen appears to be paired with NWA 6709.
Geochemistry: Diogenite orthopyroxene Fs38.4-38.9Wo2.9-2.3, Fs29.5Wo1.5, Fs22.6Wo1.1 (FeO/MnO=30-36), host orthopyroxene Fs47.6Wo2.1, FeO/MnO=30), augite exsolution lamellae Fs16.3-17.6Wo42.7-42.5, FeO/MnO=26-27.
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|Weight: 81.7 gm|