NWA 10621 LUNAR Meteorite - 469mg Slice
With an extremely low total known weight of only 22 grams, there is very little of this rare Lunar feldspathic breccia meteorite to go around. Encapsulated for protection and years of enjoyment, this is a slice of a rock that formed on the Moon and was ejected off the lunar surface by the impact of an asteroid, finally landing on Earth.
This slice is even more special due to the presence of free iron--an rare find in Lunar meteorites! The photo of the front shown at an angle to the camera reveals the free iron as reflected light and the "shine"--it's the bright white areas.
Slice weight: 469mg
Slice size: 20mmW x 12mmH x ~1.25-1.5mm
Petrography: (A. Irving and S. Kuehner, UWS) Very fine grained and relatively olivine-rich fragmental breccia consisting of mineral clasts of anorthite, olivine, pigeonite, subcalcic augite, augite, ilmenite, armalcolite and kamacite in a matrix containing minor barite.
Geochemistry: Olivine (Fa26.5-26.9, FeO/MnO = 87-90, N = 2), pigeonite (Fs23.1-23.3Wo6.7-7.8, FeO/MnO = 50-58, N = 2), subcalcic augite (Fs13.9Wo34.0, FeO/MnO = 47), augite (Fs12.5Wo37.6, FeO/MnO = 43), plagioclase (An91.1-91.3Or1.1-1.3, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave (in wt.%) FeO 6.7, Na2O 0.50; (in ppm) Sc 9.9, Cr 860, Co 40, La 15.7, Sm 7.2, Eu 1.49, Yb 4.7, Lu 0.65, Hf 5.8, Th 2.4.
Classification: Lunar (feldspathic breccia).
Stand and scale cube seen in pictures are not included.