Sample Petrographic Description
Sample Number | GRA 06157 |
Newsletter | 30,2 |
Location | Graves Nunataks |
Field Number | 17724 |
Dimensions (cm) | 1.0 x 1.0 x 0.5 |
Weight (g) | 0.79 |
Original Classification | Lunar-Anorth. Breccia |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 7-54;Ferrosilite (mol%): 19-66 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The exterior has no fusion crust and is a gray color with white and cream colored clasts. The interior is a gray matrix with white clasts throughout. | |
Thin Section Description (,2) - Tim McCoy, Lauren LaCroix, Linda Welzenbach | |
The section shows a groundmass of comminuted pyroxene, olivine and plagioclase with grain sizes up to 1 mm. One-half of the section exhibits a darkened matrix. Olivine is Fa7-54, pyroxene ranges from Fs19-66Wo2-45 (Fe/Mn ~ 60), and plagioclase An94-97. The meteorite is lunar, probably an anorthositic regolith breccia. |
Antarctic Meteorite Images for Sample GRA 06157 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample GRA 06157 | ||||
Thin Section Photo(s) : | ||||