Sample Petrographic Description
Sample Number | QUE 99799 |
Newsletter | 24,2 |
Location | Queen Alexandra Range |
Field Number | 12184 |
Dimensions (cm) | 2.5 x 2.0 x 1.25 |
Weight (g) | 8.30 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 23-54 | |
Weathering | |
B | |
Fracturing | |
B/C | |
Macroscopic Description - Kathleen McBride | |
Approximately 40% of this achondrite's exterior has a shiny black fusion crust with some dull and weathered patches. The interior is white matrix with long, thin black minerals. The meteorite looks shocked. A broken, weathered face has small, black globs that resemble fusion crust. | |
Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
The section exhibits a brecciated texture dominated by equant pyroxenes ~200 microns in diameter and plagioclase laths reaching 0.5 mm in length. Pyroxene is finely exsolved with compositions ranging from Fs23Wo40 to Fs54Wo2, as well as intermediate compositions. The Fe/Mn ratio of the pyroxene is ~28. Plagioclase is An80Or1. The meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample QUE 99799 | ||||
Lab Photo(s) : | ||||