Sample Petrographic Description
Sample Number | MAC 02527 |
Newsletter | 26,2 |
Location | MacAlpine Hills |
Field Number | 14272 |
Dimensions (cm) | 2.0 x 1.0 x 0.75 |
Weight (g) | 3.38 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 61 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior has a dark brown, dull fusion crust. The interior is light gray matrix with white and tan inclusions < 1 mm in size. | |
Thin Section Description (,3) - Tim McCoy, Linda Welzenbach | |
The sections are composed of a groundmass of pyroxene and plagioclase (up to 0.5 mm) with few basaltic clasts. Pyroxene grains are mixtures of orthopyroxene and augite with exsolution lamellae of 1-5 microns. Most pyroxene analyses were intermediate compositions, but end members appear to be FeO-rich with orthopyroxene of Fs61Wo3 and augite of Fs28Wo41 (Fe/Mn ~ 30). Plagiolcase is An90. The meteorite is a brecciated eucrite. |
Antarctic Meteorite Images for Sample MAC 02527 | ||||
Lab Photo(s) : | ||||