NWA 8251 (paired)





Northwest Africa
Find, 2013

Primitive achondrite, Lodranite
A complete specimen, 66,0g
Size: 3,9 x 4,7 x 2,9cm

History:
Purchased by Jarkko Kettunen in spring 2014 from a dealer in Ouarzazate, Morocco. This piece is bought from the same dealer than Marcin Cimala´s stones in December 2013. This piece is like paired with NWA 8251.

Petrography of NWA 8251:
(A. Irving and S. Kuehner, UWS) Matrix-poor breccia composed mainly of angular mineral grains (including bright green clinopyroxene) and sparse stained metal. Minerals are olivine, orthopyroxene, clinopyroxene, stained kamacite, troilite and chromite.

Geochemistry of NWA 8251:
Olivine (Fa11.7-11..8; FeO/MnO = 27-30), orthopyroxene (Fs10.5-10.7Wo4.9-4.0; FeO/MnO = 16), clinopyroxene (Fs5.0-5.7Wo43.8-44.6; FeO/MnO = 10-15). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively δ17O = 0.345, -0.184, -0.220, δ18O = 2.428, 2.359, 2.221, Δ17O = -0.937, -1.430, -1.393 per mil (for a TFL slope of 0.528).

Classification of NWA 8251:
Lodranite breccia. This material is likely paired with NWA 8118 and NWA 8216.

References:
Meteoritical Bulletin Database

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