Newsletter |
23,1 |
Location |
Graves Nunataks |
Field Number |
11930 |
Dimensions (cm) |
4.0 x 3.0 x 2.0 |
Weight (g) |
59.07 |
Original Classification |
H3.8 Chondrite |
Pairing |
GRA 98023;
GRA 98024;
GRA 98050;
GRA 98087;
|
Fayalite (mol%): 4-22;Ferrosilite (mol%): 16 |
C |
C |
These meteorites have small patches of black fusion crust on a rough, rusty brown exterior. Areas without fusion crust are rusty brown with penetrating fractures. The interiors are fine-grained and rusty with large fractures and a high metal content. Some gray and weathered chondrules are visible. |
A single description suffices for these meteorites. The sections exhibit numerous small, well-defined chondrules (up to 1.5 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is extremely abundant. The meteorites are highly weathered. Silicates are unequilibrated; olivines range from Fa3-33, with most grains Fa18, and pyroxenes from Fs4-16. The meteorites are H3 chondrites (estimated subtype 3.8). |