Name: Graves Nunataks 95229 This is an OFFICIAL meteorite name. Abbreviation: GRA 95229 Observed fall: No Year found: 1995 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 128.9 g
Macroscopic Description: Kathleen McBride
The exterior has dull black fusion crust with polygonal fractures. The matrix is dark with numerous chondrules most of which have weathered to a yellowish color.
Thin Section (,2) Description: Brian Mason
The section shows a close packed aggregate of chondrules (up to 2 mm across) and chondrule fragments in a small amount of black matrix which contains about 10% nickel-iron (in part concentrated as rims to chondrules) and a little troilite. Chondrule types include granular olivine, olivine-pyroxene and barred olivine. Weathering is indicated by pervasive limonitic staining. Microprobe analyses show that most of the olivine is close to Mg2SiO4 in composition, with a few iron-rich grains; pyroxene composition is Fs2-4. The meteorite is tentatively clas-sified as a C2 chondrite of the Renazzo subtype, although the amount of matrix is unusually low.
128.9 g
