Sample Petrographic Description
Sample Number | LAP 031062 |
Newsletter | 29,2 |
Location | LaPaz Ice Field |
Field Number | 16437 |
Dimensions (cm) | 2.5 x 2.5 x 1.0 |
Weight (g) | 12.27 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 17-41 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior of this eucrite has black fusion crust with glassy patches. The interior is tan to light brown with no metal and black and white specks are visible. | |
Thin Section Description (,2) - Tim McCoy, Valerie Reynolds | |
This meteorite consists of a brecciated matrix that contains abundant coarse (up to 2 mm) mineral fragments and rare polyminerallic clusters. Mineral compositions are relatively homogeneous with orthopyroxene (Fs41Wo1), lamellae of augite (Fs17Wo41), and plagioclase (An89Or0.5). The Fe/Mn ratio of the pyroxene is ~28. The meteorite is a brecciated eucrite. |