Newsletter |
43,1 |
Location |
Grosvenor Mountains |
Field Number |
25776 |
Dimensions (cm) |
2.9 x 4.1 x 2.3 |
Weight (g) |
59.36 |
Original Classification |
L6 Chondrite |
Fayalite (mol%): 25;Ferrosilite (mol%): 21 |
B/C |
A/B |
60% of exterior is covered with dark brown-black fusion crust that is pitted with some fracturing and a few iridescent weathering halos. Exposed surfaces are grey matrix with small black and metal inclusions throughout as well as some lighter brown round inclusions visible and heavily rusted to a dark orange brown. Fresh interior is light grey matrix with small black and metal inclusions throughout and is heavily rusted to a dark brown with some patches of orange-brown. |
The meteorite is an unexceptional L6 chondrite (Fa24, Fs21) with an exceptional network of shock veins at one end of the section. The shock veins reach up to several millimeters in width with veins and contain networks of metal-sulfide intergrowths including larger composite particles with dendritic iron-nickel metal in a matrix of iron sulfide. Most exceptional is the occurrence of grains exceeding 200 microns in diameter that have a distinct greenish-blue color in plane polarized light. Their occurrence and appearance are suggestive of wadsleyite (a high-pressure polymorph of olivine) and their composition of Fa24 is consistent with this interpretation. |