Sample Petrographic Description
| Sample Number | GRO 06054 |
| Newsletter | 31,1 |
| Location | Grosvenor Mountains |
| Field Number | 19303 |
| Dimensions (cm) | 12.5 x 8.0 x 5.0 |
| Weight (g) | 1319.40 |
| Original Classification | L3 Chondrite |
| Updated Classification | L3.05 Chondrite |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 4-28;Ferrosilite (mol%): 4-23 | |
| Weathering | |
| A | |
| Fracturing | |
| A | |
| Macroscopic Description - Kathleen McBride | |
| The exterior has a brown/black fusion crust with polygonal fractures and minor evaporites. The interior is a dark gray to black matrix, loaded with chondrules and inclusions of various colors. The meteorite is moderately hard. | |
| Thin Section Description (,2) - Tim McCoy, Cari Corrigan, Linda Welzenbach | |
| The section exhibits numerous closely-packed, well-defined chondrules of a range of sizes (up to 3 mm) in a black matrix of fine-grained silicates, metal and troilite. Modest shock effects and weathering are present. Silicates are unequilibrated; olivines range from Fa4-28 and pyroxenes from Fs4-23. The meteorite is an L3 chondrite (estimated subtype 3.6). | |
| Reclassification Notes (AMN 44,2) | |
| Reclassified as an L3.05 Chondrite based on Cr contents of Type II chondrule olivine. Pairing groups adjusted based on olivine composition and recovery location. Righter, K., Schutt, J., Lunning, N., Harvey, R., & Karner, J. (2021a) Identification and pairing reassessment of unequilibrated ordinary chondrites from four Antarctic dense collection areas. Meteoritics & Planetary Science 56, 1556-1578. | |
| Antarctic Meteorite Images for Sample GRO 06054 | ||||
| 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 | ||||
| Antarctic Meteorite Images for Sample GRO 06054 | ||||
| Lab Photo(s) : | ||||
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| Antarctic Meteorite Images for Sample GRO 06054 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample GRO06054 | |
| Eschrig, J., Bonal, L., Beck, P., Prestgard, T.J., 2021, Spectral reflectance analysis of type 3 carbonaceous chondrites and search for their asteroidal parent bodies. Icarus, 354, 114034, https://doi.org/10.1016/j.icarus.2020.114034. | |
| 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. | |
| Bloom, H., Lodders, K., Chen, H., Zhao, C., Tian, Z., Koefoed, P., Petö, M.K., Jiang, J., and Wang, K., 2020, Potassium isotope compositions of carbonaceous and ordinary chondrites: Implications on the origin of volatile depletion in the early solar system. Geochimica et Cosmochimica Acta, 277, 111–131. | |
| Nielsen, S. G., Auro, M., Righter, K., Davis, D., Prytulak, J., Wu, F., & Owens, J. D., 2019, Nucleosynthetic vanadium isotope heterogeneity of the early solar system recorded in chondritic meteorites. Earth and Planetary Science Letters, 505, 131-140. | |
| Bonal, L., Quirico, E., Flandinet, L., Montagnac, G., 2016, Thermal history of type 3 chondrites from the Antarctic meteorite collection determined by Raman spectroscopy of their polyaromatic carbonaceous matter. Geochimica et Cosmochimica Acta, 189, 312-337. | |
| Vernazza, P., and M. Lockhart , B. Zanda, R. P. Binzel, T. Hiroi, F. E. DeMeo, M. Birlan, R. Hewins, L. Ricci, P. Barge, 2014, Multiple and fast: The accretion of ordinary chondrite parent bodies. . The Astrophysical Journal , 791, 120-131, https://doi.org/10.1088/0004-637X/791/2/120. | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples. | |