Sample Petrographic Description
Sample Number | DOM 10120 |
Newsletter | 34,2 |
Location | Dominion Range |
Field Number | 21965 |
Dimensions (cm) | 5.0 x 3.0 x 3.0 |
Weight (g) | 65.72 |
Original Classification | Howardite |
Pairing | DOM 10100; DOM 10105; DOM 10120; DOM 10837; DOM 10838; DOM 10839; |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 2-63 | |
Weathering | |
A/B | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
Brown/black to black fusion crust with shiny black patches covers the exterior of these rocks. The crust exhibits polygonal fractures and areas of ropy, rough textured patches. These meteorites have gray matrix with numerous inclusions and angular clasts in a wide range of sizes (mm to cm) and colors (dark gray, black, white, cream and green). | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach, Andrew Beck, Nicole Lunning | |
These meteorites show a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic clasts ranging up to 5 mm. Basaltic material occurs as the host rock and as clasts within these meteorites. Half of DOM 10105 is dominated by a 1 cm diogenitic clast. More than half of DOM 10837 is comprised of an impact melt clast. Most pyroxene is orthopyroxene with compositions ranging from Fs21-52Wo1-4 (most Fs20-30). Some augite of Fs12-19Wo32-50 are present, as are rare olivines of Fa12. These meteorites are howardites. |
Antarctic Meteorite Images for Sample DOM 10120 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample DOM 10120 | ||||
Thin Section Photo(s) : | ||||
References for Sample DOM10120 | |
Hahn, T. M., Lunning, N. G., McSween, H. Y., Bodnar, R. J., and Taylor, L. A., 2018, Mg-rich harzburgites from Vesta: Mantle residua or cumulates from planetary differentiation. Meteoritics & Planetary Science, 53, 514-546, doi: 10.111/maps.13036. | |
Hahn, T. M., Lunning, N. G., McSween, H. Y., Bodnar, R. J., & Taylor, L. A. , 2017, Dacite formation on Vesta: Partial melting of the eucritic crust. Meteoritics & Planetary Science, 52, 1173-1196, doi: 10.1111/maps.12870. |