Northwest Africa 2520
Algeria
Found 2004
Ordinary chondrite LL3

One partially crusted stone, weighing 75.5 g, was purchased in Erfoud in September 2004. Classification and mineralogy (M. Bourot-Denise, MNHNP): brecciated; major part has abundant, large chondrules (>500µm), with entirely devitrified mesostasis (diopside and plagioclase, An12.3); several more or less melted clasts, in which the chondritic texture has been erased and opaques make up pervasive fine blebs in silicates. Olivine, Fa0.9-32.3, mean Fa25.0±7.7, FeO-poor chondrule olivines are zoned; pyroxene, Fs3.5-33.7, mean Fs18.2±8.9. Magnetic susceptibility 3.66 (J. Gattacceca, CEREGE, Aix en Provence). Estimated subtype 3.6-3.7 (from FeO zoning in olivine); estimated shock stage S4/S5; weathering grade W4 (metal and sulfide much altered).