NWA 8038, Carbonaceous CO3 Chondrite, Micromount

$5.00

NWA 8038 was found as a single stone in the Saharan Desert of Morocco in 2013. It was analyzed and classified as a rare carbonaceous CO3 meteorite (estimated sub-type is CO3.5).

Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing a small fragment like the one shown. Your purchase will include a labeled gemjar for safe storage.

From the Meteoritical Bulletin entry on NWA 8038 :

Northwest Africa 8038 (NWA 8038)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Eric Twelker in February 2013 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Small chondrules (mostly 0.2-0.6 mm, some up to 1.5 mm) and fine-grained CAI (composed of hibonite and spinel, with rims of aluminous clinopyroxene) in a dark brown, stained matrix. Minor pentlandite occurs in the matrix.

Geochemistry: Olivine (Fa0.3-39.1; Cr2O3 in ferroan olivine 0.06-0.15 wt.%, mean 0.09 wt.%, s.d. 0.03 wt.%, N = 7), orthopyroxene (Fs1.3-8.9Wo4.3-2.8), clinopyroxene (Fs1.4Wo38.6; Fs1.3Wo48.8; Fs16.9Wo53.0).

Classification: Carbonaceous chondrite (CO3). Subtype is estimated to be 3.5 on the basis of the narrow distribution of Cr2O3 in ferroan olivine.

Specimens: 22.3 g and one polished thin section are at UWB. The remainder is held by Twelker.