Sample Petrographic Description
Sample Number | LAP 031316 |
Newsletter | 29,2 |
Location | LaPaz Ice Field |
Field Number | 16711 |
Dimensions (cm) | 3.5 x 2.5 x 2.0 |
Weight (g) | 25.82 |
Original Classification | Eucrite (Brecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 27-84 | |
Weathering | |
B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
A small patch of thick black fusion crust is visible on the exterior surface. The interior is gray with glass vein (?). Some areas are vesicular and others are white and powdery. | |
Thin Section Description (,2) - Tim McCoy, Valerie Reynolds | |
This meteorite consists of a highly-shocked clastic matrix of pyroxene and plagioclase up to 1 mm. Both pyroxene and plagioclase are mosaicized. Pyroxene exhibits a range of compositions (Fs27-61Wo2-44) reflecting exsolution of augite and orthopyroxene. The Fe/Mn ratio is ~28. Plagioclase is An80-90. The meteorite is a brecciated eucrite. |