Sample Petrographic Description
Sample Number | LEW 97221 |
Newsletter | 23,2 |
Location | Lewis Cliff |
Field Number | 9218 |
Dimensions (cm) | 4.5 x 4.0 x 2.5 |
Weight (g) | 47.96 |
Original Classification | L3 Chondrite |
Updated Classification | L3-6 Chondrite |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 5-27;Ferrosilite (mol%): 4-23 | |
Weathering | |
B/C | |
Fracturing | |
B | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior of this ordinary chondrite has brown/black fusion crust with oxidation halos. The interior has a rusty matrix with light gray inclusions 1-3 mm in diameter. The meteorite is hard and coherent. | |
Thin Section Description (,2) - Tim McCoy | |
The section exhibits a 7 by 10 mm clast of a highly metamorphosed ordinary chondrite in a matrix of much lower petrologic type. Mineral compositions range from Fa5-27, with most grains Fa25-26, and pyroxenes from Fs4-23. The meteorite is an L chondrite breccia with a type 6 clast in a matrix of type 3 material. | |
Reclassification Notes (AMN 23,2) | |
Classification updated to L3-6 as announced in AMN vol. 23, no. 2. |
Antarctic Meteorite Images for Sample LEW 97221 | ||||
Lab Photo(s) : | ||||
References for Sample LEW97221 | |
Righter, K., Schutt, J., Lunning, N., Harvey, R, and Karner, J., 2021, Identification and pairing reassessment of unequilibrated ordinary chondrites from four Antarctic dense collection areas. Meteoritics & Planetary Science, 56, 1556-1573, doi: 10.1111/maps.13707. | |
RELAB, , Reflectance Experiment Lab , catalogue of samples. |