Sample Petrographic Description
Sample Number | GRO 95608 |
Newsletter | 21,1 |
Location | Grosvenor Mountains |
Field Number | 7628 |
Dimensions (cm) | 2.5 x 1.5 x 0.5 |
Weight (g) | 6.08 |
Original Classification | Ureilite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 22;Ferrosilite (mol%): 18 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Carol Schwarz | |
Eighty percent of this ureilite is covered with fusion crust which is smooth and black on the top and frothy on the bottom. The interior is black with areas of oxidation. Metal and white to yellowish colored mineral grains are visible on the interior and many larger interior grains have obvious cleavage planes. The specimen was very coherent. | |
Thin Section Description (,2) - Brian Mason | |
The section shows an aggregate of anhedral grains of olivine and pyroxene, up to 3 mm across. Individual grains are rimmed with carbonaceous material which contains trace amounts of nickel-iron and troilite. The meteorite appears to be relatively unshocked. Microprobe analyses show the following compositions: olivine, Fa22; pyroxene, Wo11Fs18. The meteorite is a ureilite. |
Antarctic Meteorite Images for Sample GRO 95608 | ||||
Thin Section Photo(s) : | ||||
References for Sample GRO95608 | |
Singletary, S. J., Grove, T. L., 2003, Early petrologic processes on the ureilite parent body. Meteoritics & Planetary Science, 38, 95-108. |