Name: Grosvenor Mountains 95566 This is an OFFICIAL meteorite name. Abbreviation: GRO 95566 Observed fall: No Year found: 1995 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 50.7 g
Macroscopic Description: Kathleen McBride
The exterior of this carbonaceous chondrite is covered with black
fusion crust. The surface is vesicular and displays polygonal
fractures. It has a rough texture and is friable. One surface
lacks fusion crust. The black interior reveals white material
between the fusion crust and the meteorite, which may be evaporite.
The numerous chondrules are less than 1 mm in size. Some condrules
appear to be rusty.
Thin Section (,5) Description: Brian Mason
The section shows numerous small chondrules (up to 0.6 mm across),
some irregular aggregates, and many small silicate grains in a
black matrix; trace amounts of nickel-iron and troilite are present
as minute grains. The silicate grains are almost entirely olivine
near Mg2 SiO4 in composition, with a few
more iron-rich grains. A little pyroxene near MgSiO3 in
composition is present. The matrix appears to consist largely
of iron-rich serpentine. The meteorite is a C2 chondrite.
Choe W. H., Huber H., Rubin A.E., Kallemeyn G. W., and Wasson J. T. (2010) Compositions and taxonomy of 15 unusual carbonaceous chondrites. Meteorit.
Planet. Sci.45, 531-554 (link)
50.7 g
