NWA 4024 (4,220 g)
Northwest Africa 4024
Find: August 2005
History: The meteorite was found by an anonymous finder in the western part of the Sahara and bought by the main mass holder in Erfoud, Morocco.
Physical characteristics: A single stone of 38.1 g was recovered.
Petrography: (A. Greshake, MNB)
The meteorite exhibits an equilibrium texture of low-Ca pyroxene, Ca-pyroxene, olivine, plagioclase, Fe,Ni-rich metal, and troilite with low-Ca pyroxene being the dominant silicate phase. Fe,Ni metal and troilite are dominant in several regions and no relict chondrules were found.
Mineral compositions and geochemistry:
Olivine (Fa4.2), low-Ca pyroxene (Fs6.1), plagioclase (An11), determined by EMP.
Oxygen isotopes: (I. A. Franchi and R. C. Greenwood, OU) δ17O = 3.01, δ18O = 6.60, Δ17O = −0.42 (mean of 2; all ‰).
Classification: Primitive achondrite (winonaite); minimal shock, minimal weathering.
A total of 8 g plus one polished thin section are on deposit at MNB.
Hanno Strufe holds the main mass.
|Place of purchase:||Erfoud, Morocco|
|Classifier:||A. Greshake, MNB|
|Type spec mass (g):||8|
|Type spec location:||MNB|
|Main mass:||Hanno Strufe|