Sample Petrographic Description
Sample Number | QUE 94616 |
Newsletter | 19,2 |
Location | Queen Alexandra Range |
Field Number | 10033 |
Dimensions (cm) | 3.0 x 2.5 x 1.5 |
Weight (g) | 13.62 |
Original Classification | Howardite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 59-62;Ferrosilite (mol%): 17-58 | |
Weathering | |
B/C | |
Fracturing | |
B/C | |
Macroscopic Description - Kathleen McBride | |
The exterior surface of this achondrite is dark gray in color with a small patch of black fusion crust. The exterior has a pebbly texture. The interior reveals a dirty gray matrix with abundant mm-sized white, black and gray inclusions. Minor oxidation is visible. | |
Thin Section Description (,2) - Brian Mason | |
The section shows a microbreccia of pyroxene and plagioclase clasts in a comminuted groundmass of these minerals; the groundmass contains a few small grains of opaques. The pyroxene is orthopyroxene with a lesser amount of pigeonite; orthopyroxene clasts are up to 1.5 mm across, whereas pigeonite clasts are smaller. Microprobe analyses show orthropyroxene of essentially uniform composition, Wo3Fs24, and a wide range of pigeonite compositions, Wo5-30, Fs17-58. Plagioclase composition is An74-92. Two grains of olivine, Fa59, Fa62, were analyzed. The meteorite is a howardite. |
Antarctic Meteorite Images for Sample QUE 94616 | ||||
Thin Section Photo(s) : | ||||