Meteoritical Bulletin, No. 100
Find: 2011 May 28
Mass: 208 g
meteorite was found by anonymous finder on the Sueilila
(Zwilila) limestone plateau, ~40 km E of Hassi Lakra (Playa del
Cordero) station, in the desert.
characteristics: One brownish-grey to dark green stone
weighing 208 g in total, with no fusion crust.
Petrography: (Lorenz C.A., Ivanova M.A., and Demidova S.I. Vernad.) The
meteorite is polymict, melt matrix breccia, consisting of numerous mineral
and lithic fragments embedded in a fine-grained devitrified matrix. Lithic
clasts dominated by melt breccias, granulites, anorthosites, gabbro,
gabbro-norites, troctolites and VLT-like basalts. Rare spherules of
devitrified glass occur. The size range of the clasts is 0.02-9 mm; the
main minerals are pyroxene and feldspar; minor - olivine, silica, chromite,
ilmenite, Zr-armolcolite, troilite, and FeNi metal.
Geochemistry:(Kononkova N.N., Vernad,
EMP) feldspar An91-97Ab2.8-6.0; clinopyroxene En7.7-68.3Wo5.1-42.0,
orthopyroxene En44.4-75.0Wo2.6-4.9 (FeO/MnO = 60.03),
olivine Fo4.7-63.3 (FeO/MnO = 87); ilmenite (MgO
0.24-4.02 wt%), Al,Ti-chromite (TiO2 8.4 wt%, Al2O3 8.2 wt%) and ulvospinel. FeNi
metal: 0.68-9.51 wt% Ni; 0.40-2.27 wt% Co; sulfide is troilite.
Lunar (regolith breccia). The grade of weathering is moderate.
Specimens: A total of 21.7 g of sample and two thin sections are
on deposit at Vernad.
An anonymous finder holds the main mass of the meteorite.