Sample Petrographic Description
Sample Number | RBT 04114 |
Newsletter | 29,2 |
Location | Roberts Massif |
Field Number | 16395 |
Dimensions (cm) | 7.5 x 4.5 x 5.0 |
Weight (g) | 281.60 |
Original Classification | L3 Chondrite |
Updated Classification | L3.6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 1-29;Ferrosilite (mol%): 3-18 | |
Weathering | |
B/C | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior has thin, black fusion crust. The interior is rusty black matrix with high metal content. There are 1-2 mm sized light colored chondrules visible; some are rust stained. | |
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. Weathering is moderate. Silicates are unequilibrated; olivines range from Fa1-29 and pyroxenes are Fs3-18. 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. |
Antarctic Meteorite Images for Sample RBT 04114 | ||||
Thin Section Photo(s) : | ||||