Sample Petrographic Description
| Sample Number | LEW 93891 |
| Newsletter | 18,1 |
| Location | Lewis Cliff |
| Field Number | 8574 |
| Dimensions (cm) | 2.8 x 2.6 x 1.5 |
| Weight (g) | 25.47 |
| Original Classification | L3.7 Chondrite |
| Pairing | LEW 88328; LEW 88594; LEW 88621; LEW 88696; LEW 93891; |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 6-20;Ferrosilite (mol%): 4-23 | |
| Weathering | |
| B/C | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Cecilia Satterwhite | |
| Ninety percent of the exterior of this unequilibrated ordinary chondrite is covered with pitted, brownish-black fusion crust. The interior is dark gray to brown. Metal occurrence is low. There are abundant chondrules visible and most are heavily weathered. | |
| Thin Section Description (,2) - Brian Mason | |
| The section shows numerous chondrules (up to 2.2 mm across), chondrule fragments, and mineral grains in a dark brown to black matrix which contains minor amounts of nickel-iron and troilite. Brown limonitic staining pervades the section. Microprobe analyses show a wide range of olivine and pyroxene compositions: olivine, Fa6-20, mean Fa15; pyroxene, Fs4-23. The meteorite is an L3 chondrite (estimated L3.7). | |
| Notes | |
| Righter et al. (2021) proposed that LEW 88328, LEW 88594, LEW 88621, LEW 88696, LEW 93891 are paired and Type L3.7. | |
| Antarctic Meteorite Images for Sample LEW 93891 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample LEW93891 | |
| 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. | |