Northwest
Africa 2519
Algerian-Moroccan
border
Found 2004
Carbonaceous chondrite (CK4)
One
completely crusted stone weighing 44.5 g was purchased
in Erfoud in September 2004. Classification and
mineralogy (M. Bourot-Denise, MNHNP): clear chondritic
texture, with large chondrules (~500 µm)
and large opaque nodules of associated pentlandite
and magnetite with minor pyrrhotite. Silicates
are generally very fissured and blackened by fine
magnetite blebs. Their composition is very homogeneous;
olivine Fa31.3±0.4, 0.5 wt % NiO; pyroxene
Fs27.0±1.1 Wo1.6±2.0; clinopyroxene
Fs9.1 Wo46.9; plagioclase An22 to An47, 0.13 wt%
NiO. Magnetite is Cr-rich, 4.3 wt% Cr2O3, 0.6 wt%
NiO, 0.3 wt% TiO. Estimated shock stage S3, weathering
grade W2 (sulfide altered); magnetic susceptibility
4.61 (J. Gattacceca, CEREGE, Aix en Provence).
Specimens: type specimen 9.4 g and one polished
mount, MNHNP; main mass with Philippe Thomas.
Meteoritical
Bulletin Database
Sorry!
this meteorite is no more available for
sale.
|
NWA
2519, CK4
© Ph.
Thomas (click to enlarge)
NWA
2519, CK4
© Ph.
Thomas (click to enlarge)
|
