Sample Petrographic Description
| Sample Number | MET 01018 |
| Newsletter | 26,2 |
| Location | Meteorite Hills |
| Field Number | 13874 |
| Dimensions (cm) | 6.5 x 5.5 x 3.5 |
| Weight (g) | 222.40 |
| Original Classification | EH3 Chondrite |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 0-1;Ferrosilite (mol%): 0-2 | |
| Weathering | |
| B/C | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Kathleen McBride | |
| 80% of the sample's exterior has weathered fusion crust with oxidation haloes and polygonal fractures. The interior is weathered with some rust and light colored chondrules (mm sized). | |
| Thin Section Description (,4) - Linda Welzenbach, 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. Several chondrules contain olivine. Weathering is modest, with staining of some enstatite grains and minor alteration of metal and sulfides. Microprobe analyses show the olivine is Fa0-1, orthopyroxene is Fs0-2 and metal contains ~3.5 wt.% Si. The meteorite is an EH3 chondrite. | |
| Antarctic Meteorite Images for Sample MET 01018 | ||||
| Field Photo(s) : | ||||
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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 | ||||
| References for Sample MET01018 | |
| Lehner, S. W., Petaev, M. I., Zolotov, M. Y., Buseck, P. R., 2013, Formation of niningerite by silicate sulfidation in EH3 enstatite chondrites. Geochimica et Cosmochimica Acta, 101, 15-Jan-13, 34-56, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2012.10.003. | |
| Van Acken, D., Brandon, A. D., Humayun, M., 2011, High-precision osmium isotopes in enstatite and Rumuruti chondrites. Geochimica et Cosmochimica Acta, 75 Issue 14, 15-Jul-11, 4020-4036, ISSN 0016-7037, http://dx.doi.org/10.1016/j.gca.2011.04.019. | |
| Rochette, P., Kohout, T., Pesonen, L., Quirico, E., Sagnotti, L., Skripnik, A., Gattacceca, J., Bonal, L., Bourot-Denise, M., Chevrier, V., Clerc, J. P., Consolmagno, G., Folco, L., Gounelle, M., 2008, Magnetic classification of stony meteorites: 2. Non-ordinary chondrites. Meteoritics & Planetary Science, 43, 959-980, http://dx.doi.org/10.1111/j.1945-5100.2008.tb01092.x. | |