Sample Petrographic Description
Sample Number | LAP 03782 |
Newsletter | 27,3 |
Location | LaPaz Ice Field |
Field Number | 16082 |
Dimensions (cm) | 2.5 x 2.5 x 1.75 |
Weight (g) | 22.27 |
Original Classification | Eucrite (Unbrecciated) |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 30-58 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
The exterior of this eucrite has about 40% thin, black, shiny fusion crust. The interior has a dense crystalline matrix with minor rust and is very hard. | |
Thin Section Description (,2) - Tim McCoy, Linda Welzenbach | |
This meteorite exhibits a granoblastic texture, with pyroxenes reaching 1.5 mm and plagioclase 1.0 mm, although most grains are smaller. Pyroxenes are exsolved on the scale of 1-20 microns, with orthopyroxene (Fs58Wo4), with lamellae of augite (Fs30Wo37), and plagioclase (An90Or0.2). The Fe/Mn ratio of the pyroxene is ~30. Staining by hydrated iron oxides is pervasive. The meteorite is an unbrecciated eucrite. |
Antarctic Meteorite Images for Sample LAP 03782 | ||||
Lab Photo(s) : | ||||