Country: Morocco
State/District: Erfoud
Date of purchase: 2005
Total known weight: 38.1 gr (approx.)
Number of pieces: 1
Remarks:
Classification:
Type: Primitive achondrite (winonaite), minimal shock, minimal weathering.
Shock Stage:
Weathering Stage:
Mineral Analyses: olivine, Fa4.2; low-Ca pyroxene, Fs6.1; plagioclase, An11.
Pairings: not known
Synonyms: not known
Description and History: Show/Hide
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.
Type specimen: A total of 8 g plus one polished thin section are on deposit at MNB. HSSH holds the main mass.
The meteorite data was copied from the Meteoritical Bulletin Database
Specimen ID: NWA4024-01
Description: etched endcut
Weight: 5.50 gr.
Size: 21 x 13 x 7 mm
Price: US-$ 275.-- (SOLD!)
