Sample Petrographic Description
| Sample Number | LAR 12156 |
| Newsletter | 40,1 |
| Location | Larkman Nunatak |
| Field Number | 23140 |
| Dimensions (cm) | 2.0 x 4.5 x 3.0 |
| Weight (g) | 59.20 |
| Original Classification | EH3 Chondrite |
| Mineral Composition (%Fa & %Fs) | |
| Ferrosilite (mol%): 0-7 | |
| Weathering | |
| A | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Rachel Funk | |
| Black fusion crust covers the exterior of this enstatite chondrite, fractures and minor amounts of reddish/orange rust are visible. The interior is a dark groundmass with minor amounts of orange rust and shiny metals are visible throughout. | |
| Thin Section Description (,2) - Cari Corrigan, Tim McCoy | |
| The section shows an aggregate of chondrules (up to 1 mm), chondrule fragments, and pyroxene grains in a matrix of about 30% metal and sulfide. Chondrules contain minor abundances of olivine. Weathering is minor. Microprobe analyses show the pyroxene is Fs0-7 and that the Fe,Ni metal contains 3 wt. % Si. The meteorite is an EH3 chondrite. | |
| Antarctic Meteorite Images for Sample LAR 12156 | ||||
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| Field photo image(s) courtesy of the ANSMET (ANtarctic Search for METeorites) Program, Case Western Reserve University and the University of Utah | ||||
| Antarctic Meteorite Images for Sample LAR 12156 | ||||
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| Antarctic Meteorite Images for Sample LAR 12156 | ||||
| Thin Section Photo(s) : | ||||
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