Sample Petrographic Description
Sample Number | LAP 031223 |
Newsletter | 29,2 |
Location | LaPaz Ice Field |
Field Number | 16677 |
Dimensions (cm) | 1.5 x 1.5 x 1.5 |
Weight (g) | 4.78 |
Original Classification | L3 Chondrite |
Updated Classification | L3.6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-27;Ferrosilite (mol%): 3-19 | |
Weathering | |
B/C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
The exterior is covered with brown/black fusion crust with polygonal fractures. The coarse grained interior is rusty with low metal and some gray and rust stained chondrules visible. | |
Thin Section Description (,2) - Tim McCoy | |
The section exhibits numerous small, well-defined chondrules (up to 1.5 mm) in a black matrix of fine-grained silicates, metal and troilite. Silicates are unequilibrated; olivines range from Fa1-27 and pyroxenes are Fs3-19. The meteorite is an L3 chondrite (estimated subtype 3.6). | |
Reclassification Notes (AMN 29,2) | |
Classification updated to L3.6, as announced in AMN vol. 29, no. 2. |