Sample Petrographic Description
Sample Number | LAP 10109 |
Newsletter | 36,2 |
Location | LaPaz Ice Field |
Field Number | 22966 |
Dimensions (cm) | 2.9 x 1.5 x 1.5 |
Weight (g) | 7.41 |
Original Classification | L3.5 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 3-35;Ferrosilite (mol%): 21-28 | |
Weathering | |
A/B | |
Fracturing | |
A | |
Macroscopic Description - Cecilia Satterwhite | |
30% of the exterior is covered with black/brown fusion crust. Oxidation haloes and brown weathering are visible on some surfaces. The interior is gray matrix with some large inclusions. Oxidation is scattered throughout and minor metal is visible. | |
Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
The section exhibits numerous small to medium, well-defined chondrules (though one fragment is up to 5 mm) in a black matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is extremely abundant. Silicates are unequilibrated; Olivines are Fa3-35. Pyroxenes are Fs21-28Wo2-6. The meteorite is an L3 chondrite (estimated subtype 3.5). |
Antarctic Meteorite Images for Sample LAP 10109 | ||||
Thin Section Photo(s) : | ||||