Sample Petrographic Description
| Sample Number | PRE 95410 |
| Newsletter | 20,2 |
| Location | Mt. Prestrud |
| Field Number | 8612 |
| Dimensions (cm) | 4.0 x 3.0 x 2.5 |
| Weight (g) | 41.65 |
| Original Classification | R Chondrite (Carlisle Lakes) |
| Updated Classification | R3 Chondrite |
| Pairing | PRE 95404; PRE 17271; PRE 17272; PRE 95410; PRE 95411; PRE 95412; |
| Weathering | |
| A/B | |
| Fracturing | |
| A | |
| Macroscopic Description - Kathleen McBride | |
| The surface of all three of these meteorites have black fusion crust with polygonal fractures. The surfaces are pitted and vesicular. The interior is medium gray with small light clasts and chondrules visible. | |
| Thin Section Description (,2) - Brian Mason | |
| The sections are so similar that a single description suffices; the meteorites are certainly paired. The sections show polycrystalline silicates clasts (up to 3 mm across), chondrules (up to 1.2 mm across) and mineral grains in a finely granular gray matrix. Nickel-iron and sulfide are present in accessory amounts. The meteorite is essentially unweathered. Microprobe analyses show olivine and pyroxene of variable composition. Olivine compositions show a prominent peak at Fa39, with a few more magnesian grains., Pyroxene is present in minor amounts, both hypersthene (Wo4Fs29) and diopside (Wo45Fs15). The meteorite is an R chondrite, very similar to PCA91002 (Meteoritics, 29, p.255, 1994). | |
| Reclassification Notes (AMN 31,1) | |
| Reclassified as R3 Chondrite in AMN 31,1. | |
| Antarctic Meteorite Images for Sample PRE 95410 | ||||
| Lab Photo(s) : | ||||
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| Antarctic Meteorite Images for Sample PRE 95410 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample PRE95410 | |
| Obase, T., Nakashima, D., Nakamura, T., Nagao, K., 2020, Cosmic-ray exposure age and heliocentric distance of the parent body of the Rumuruti chondrite PRE 95410. Meteoritics & Planetary Science, 55, 1031-1047, doi: 10.1111/maps.13481. | |
| Miller, K. E., Lauretta, D. S., Connolly, H. C., Berger, E. L., Nagashima, K., & Domanik, K. , 2017, Formation of unequilibrated R chondrite chondrules and opaque phases. . Geochimica et Cosmochimica Acta, 209, 24-50, http://dx.doi.org/10.1016/j.gca.2017.04.009. | |
| Bischoff, A., Vogel, N., Roszjar, J., 2011, The Rumuruti chondrite group. Chemie der Erde - Geochemistry, 71 Issue 2, May-11, 101-133, ISSN 0009-2819, http://dx.doi.org/10.1016/j.chemer.2011.02.005. | |
| 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. | |
| Schultz, L., Weber, H. W., Franke, L., 2005, Rumuruti chondrites: Noble gases, exposure ages, pairing, and parent body history. Meteoritics & Planetary Science, 40, 557-571, http://dx.doi.org/10.1111/j.1945-5100.2005.tb00963.x. | |
| Schultz, L., Franke, L., 2004, Helium, neon, and argon in meteorites: A data collection. Meteoritics & Planetary Science, 39, 1889-1890, http://dx.doi.org/10.1111/j.1945-5100.2004.tb00083.x. | |