Sample No.: EET83322

Location: Elephant Moraine

Weight (g): 14.3

Field No.: 2849

Dimensions (cm): 3 x 2.5 x 2 Meteorite Type: E4 Chondrite

Macroscopic Description: Roberta Score

One small patch of fusion crust is present on the iridescent reddish-brown exterior of this stone. Interior is black and speckled with small (<1 mm) inclusions. Abundant black minerals show well-developed crystal faces. Metal may be present. Minor oxidation haloes are visible. Stone is very cohesive.

Thin Section (,2) Description: Brian Mason

Chondrules and chondrule fragments are fairly abundant, and are set in a granular matrix of pyroxene, nickel-iron, and sulfides. The chondrules range up to 0.9 mm in diameter, and consist of granular pyroxene, except for a few made up of nickel-iron and sulfide. A minor amount of brown limonitic staining is present. Microprobe analyses show that the pyroxene is close to MgSiO3 in composition (FeO 0.2-1.7, mean 0.6%; Al2O3 0.04-1.1, mean 0.3%; CaO 0.1-0.5, mean 0.3%; TiO2 0.04-0.24, mean 0.05%; MnO 0.04-0.24, mean 0.13%). The nickel-iron contains about 2.2% Si. Since part of the pyroxene is polysynthetically twinned clinoenstatite, the meteorite is classified as an E4 chondrite. It is similar to EET83307 and the possibility of pairing should be considered.