The Meteoritical Bulletin, No. 106
Purchased: 2016 November
Mass: 1139.7 g
Lunar meteorite (feldspathic breccia)
Purportedly found near Adrar, Algeria in October
2016, and purchased by Darryl Pitt in November 2016 from a dealer in
characteristics: A single medium gray stone (1139.7 g)
lacking fusion crust but exhibiting a shiny desert patina on exterior
surfaces. Very sparse, small whitish clasts are visible within a dominant
very fine grained, vesicular matrix.
(A. Irving and S. Kuehner, UWS)
Extremely fine-grained breccia consisting mainly of very tiny mineral
grains plus devitrified glass (some with swirly texture visible in thin
section) plus sparse lithic clasts, which are themselves melt rocks with
intersertal texture and sparse relict clasts. Minerals large enough to be
quantitatively analyzed are anorthite, olivine and subcalcic augite;
accessory minerals include kamacite, troilite and minor barite.
Olivine (Fa15.9-39.7, FeO/MnO = 73-77, N = 4), subcalcic augite
(Fs20.1Wo34.1, FeO/MnO = 40), plagioclase (An96.1-96.8Or0.3-0.1,
N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave
the following mean abundances (in wt.%) FeO 3.7, Na2O 0.40; (in
ppm) Sc 7.4, Ni 160, La 3.1, Sm 1.45, Eu 0.80, Yb 1.1, Lu 0.15, Hf 1.1, Th
0.41. Magnetic susceptibility log χ (× 10-9 m3/kg)
Lunar (feldspathic vitric regolith breccia).
Specimens: 20.4 g including one
polished thin section at UWB; remainder with DPitt.