Sample No.: EET83307

Location: Elephant Moraine

Weight (g): 4.8

Field No.: 2833

Dimensions (cm): 2 x 1 x 1

Meteorite Type: E4 Chondrite

Macroscopic Description: Roberta Score

Some fusion crust remains on this otherwise extensively weathered stone.

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 1.3 mm in diameter, and consist of granular pyroxene, sometimes with a little olivine, but a few are made up of nickel-iron and sulfide. Brown limonitic staining is present throughout the section. Microprobe analyses show that the pyroxene is close to MgSiO3 in composition (FeO 0.5-4.5, mean 1.5%; Al2O3 0.1-0.8, mean 0.3%; CaO 0.1-8.4, mean 0.2%; TiO2 0.02-0.11, mean 0.050; MnO 0.02-0.4, mean 0.18%). Three olivine grain were analyzed, FeO ranging from 4.3 to 5.1%. The nickel-iron contains about 2.4% Si. Since part of the pyroxene is polysynthetically twinned clinoestatite, the meteorite is classified as an E4 chondrite; It is similar to EET83322, and the possibility of pairing should be considered.