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). Specimens: type
specimen 15.8 g and one polished mount, MNHNP;
main mass with Philippe Thomas.
Meteoritical
Bulletin Database
Sorry!
this meteorite is no more available for
sale.
|
NWA
2520, LL3
© Ph.
Thomas (click to enlarge)
NWA
2520, LL3
© Ph.
Thomas (click to enlarge)
|
