Sample Petrographic Description
Sample Number | MET 00855 |
Newsletter | 26,1 |
Location | Meteorite Hills |
Field Number | 13435 |
Dimensions (cm) | 3.0 x 2.25 x 1.25 |
Weight (g) | 9.09 |
Original Classification | Diogenite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 27 | |
Weathering | |
B/C | |
Fracturing | |
B/C | |
Macroscopic Description - Kathleen McBride | |
20% of the exterior is covered with a smooth, brown fusion crust. The interior is yellow-orange in color. It has a coarse, crystalline texture with platy or cubic crystals. The meteorite is very friable. | |
Thin Section Description (,2) - Tim McCoy | |
The section exhibits a groundmass of orthopyroxene, with large (up to 5 mm) single orthopyroxene crystals and large metal and sulfide grains. Orthopyroxene is homogeneous at Fs27Wo2. The Fe/Mn ratio of the pyroxene is ~28. The meteorite is a diogenite. |
References for Sample MET00855 | |
Mittlefehldt, D. W., 2015, Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites. Chemie der Erde - Geochemistry, 75 Issue 2, Jun-15, 155-183, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2014.08.002. | |
Schiller, M., Baker, J., Creech, J., Paton, C., Millet, M., Irving, A., Bizzarro, M., 2011, Rapid Timescales for Magma Ocean Crystallization on the Howardite-Eucrite-Diogenite Parent Body. ApJ, 740, L22, http://dx.doi.org/10.1088/2041-8205/740/1/L22. |