Sample Petrographic Description
| Sample Number | LAR 12002 |
| Newsletter | 36,2 |
| Location | Larkman Nunatak |
| Field Number | 22620 |
| Dimensions (cm) | 17.5 x 12.7 x 12.6 |
| Weight (g) | 4855.00 |
| Original Classification | CV3 Chondrite |
| Updated Classification | CV 3.6 Chondrite Oxidized B |
| Pairing | LAR 06317; LAR 06628; LAR 06867; LAR 12002; LAR 12049; |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 0-34 | |
| Weathering | |
| A/B | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Cecilia Satterwhite | |
| The exterior has a rough texture with patches of brown/black fractured fusion crust with abundant white, greenish-blue evaporites. The areas without fusion crust are dark gray to black color with abundant chondrules and CAIs visible. The interior is a dark gray to black matrix with abundant white and rusty inclusions, chondrules and CAIs of various sizes. Some oxidation is present. | |
| Thin Section Description (,2) - Cari Corrigan, Linda Welzenbach | |
| The section exhibits large chondrules (up to 3 mm) and CAIs in a dark matrix. Olivines range from Fa0-34. The meteorite is an unequilibrated CV3 chondrite. | |
| Reclassification Notes (AMN 46,1) | |
| Reclassification and pairing based on Raman spectroscopy (petrologic type 3.6), and on Ni content of metal and sulfide and magnetic susceptibility (Oxidized B). Details are reported in Righter et al. (2022); doi: 10.1111/maps.13932. | |
| Antarctic Meteorite Images for Sample LAR 12002 | ||||
| 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 LAR 12002 | ||||
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| Antarctic Meteorite Images for Sample LAR 12002 | ||||
| Thin Section Photo(s) : | ||||
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| Antarctic Meteorite Scans for Sample LAR 12002 | ||||
| XCT Scan(s) : | ||||
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XCT Scan of Sample LAR 12002 |
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| References for Sample LAR12002 | |
| Hiroi, T., Ohtsuka, K., Howard, K.T., Robertson, K.R., and Milliken, R.E., Kaiden, H., Imae, N., Misawa, K., Kojima, H., Sasakia, S., Matsuokaa, M., Nakamura, T., Bish, D.L., 2021, UV-visible-infrared spectral survey of Antarctic carbonaceous chondrite chips. Polar Science, 29, 100723, https://doi.org/10.1016/j.polar.2021.100723. | |
| Yesiltas, M., Young, J., Glotch, T., 2021, Thermal metamorphic history of Antarctic CV3 and CO3 chondrites inferred from the first- and second-order Raman peaks of polyaromatic organic carbon. American Mineralogist, 106, 506-517, doi: 10.2138/am-2021-7507. | |
| Beck, A.W., Peplowski, P.N., Yokley, Z.W., 2020, A miniaturized XRF instrument for in situ planetary exploration: The Active X-Ray Spectrometer (AXRS). Planetary and Space Science, 190, 104990. | |
| 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. | |
| Harvey, R.P., Schutt, J., and Karner, J., 2015, Fieldwork Methods of the U.S. Antarctic Search for Meteorites Program. In Righter, K., Corrigan, C.M., McCoy, T.J., and Harvey, R.P. Meteorites: A Pictorial Guide to the Collection, First Edition, AGU Wiley, pp. 23-41. | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples. | |