Sample Petrographic Description
Sample Number | LAP 031370 |
Newsletter | 28,1 |
Location | LaPaz Ice Field |
Field Number | 16967 |
Dimensions (cm) | 1.75 x 0.75 x 1.5 |
Weight (g) | 8.67 |
Original Classification | Iron-Ungrouped |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 24;Ferrosilite (mol%): 21 | |
Weathering | |
B | |
Fracturing | |
A | |
Macroscopic Description - Kathleen McBride | |
The exterior is dull and rusty with oxidation haloes. This iron is shaped like a fish. | |
Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
We examined this small meteorite in polished section from a central slice. The section consists of ~90% kamacite with abundant Neumann bands that vary in spacing from a few to a hundred microns. No heat altered zone or α2 structure was observed. Included within the metal are polyminerallic silicate inclusions that reach a few mm in diameter with included metal, troilite, chromite and pentlandite and a kidney-shaped troilite inclusion 1.2 mm in length. The silicates are broadly chondritic and relict barred chondrules are present. Silicates are homogeneous with olivine of Fa24 and orthopyroxene of Fs21. The meteorite is an ungrouped iron. |
Antarctic Meteorite Images for Sample LAP 031370 | ||||
Lab Photo(s) : | ||||