The Meteoritical Bulletin, No. 103
Purchased: 2014 June
Mass: 23.8 g
Lunar meteorite (basalt)
Purportedly found near Chwichiya in 2013 and
purchased by Luc Labenne in June 2014 from a dealer in Ouarzazate,
characteristics: A single, small, dense black stone
(23.8 g) with a flat, squarish shape and no
fusion crust. Magnetic susceptibility log ? = 3.08 (X in nm3/kg)
(J. Gattacceca, CEREGE).
(A. Irving and S. Kuehner, UWS)
Porphyritic texture. Subhedral zoned olivine phenocrysts (up to 2.3 mm
long, yellowish in thin section) are set in a groundmass composed mainly of
elongate, zoned clinopyroxene grains (clear with pink rims), smaller
olivine grains and interstitial regions (opaque in thin section) consisting
of ilmenite needles, Ti-chromite, fine clinopyroxene, fayalite and glass.
No plagioclase was found. Small patches and veinlets of pale yellow
devitrified glass are present.
Olivine phenocrysts (cores Fa32.5-32.8, FeO/MnO = 90-100, N = 3;
rim Fa48.8, FeO/MnO = 98), groundmass olivine (Fa72.6-74.1,
FeO/MnO = 91-97, N = 3), augite (Fs23.7-27.1Wo40.1-40.5,
FeO/MnO = 53-55, TiO2 = 2.4-2.6 wt.%, Al2O3
= 5.9- 6.1 wt.%, N = 2), subcalcic augite (Fs26.6-27.0Wo30.8-36.1,
FeO/MnO = 54-60, TiO2 = 1.9-2.1 wt.%, Al2O3
= 4.7-5.6 wt.%, N = 2), ferroan subcalcic augite rim (Fs41.9Wo34.1,
FeO/MnO = 63, TiO2 = 3.2 wt.%, Al2O3 = 8.1
wt.%). Bulk composition (R.
INAA of subsamples gave the following mean abundances (in wt.%) FeO 22.6,
Na2O 0.28; (in ppm) Sc 51.1, Ni 70, La 7.8, Sm 4.7, Eu 0.89, Yb
4.1, Lu 0.58, Hf 3.4, Th 1.25.
Lunar (mare basalt).
Specimens: 4.6 g
including one polished thin section, one polished thick section and one
polished mount at UWB. The main mass is held by Labenne.