Sample Petrographic Description
| Sample Number | GRA 98032 |
| Newsletter | 23,1 |
| Location | Graves Nunataks |
| Field Number | 11314 |
| Dimensions (cm) | 12.0 x 9.0 x 10 |
| Weight (g) | 1699.50 |
| Original Classification | Ureilite |
| Mineral Composition (%Fa & %Fs) | |
| Fayalite (mol%): 14-26 | |
| Weathering | |
| C | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Kathleen McBride | |
| Brown/black, patchy fusion crust covers approximately 50% of the surface area. The interior of the meteorite is rusty-gray in color with numerous inclusions and metal-like grains and veins. | |
| Thin Section Description (,2) - Tim McCoy | |
| The section consists of an aggregate of large olivine and pyroxene grains up to 2 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. The olivines have been mosaicized by shock. Olivines have cores of Fa25, with rims reduced to Fa14. Pigeonite (Fs16-20, Wo4-9) exhibits a blotchy appearance. A single subcalcic augite grain had a composition of Fs15Wo26. The meteorite is a ureilite. | |
| Antarctic Meteorite Images for Sample GRA 98032 | ||||
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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 GRA 98032 | ||||
| Lab Photo(s) : | ||||
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| Antarctic Meteorite Images for Sample GRA 98032 | ||||
| Thin Section Photo(s) : | ||||
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| References for Sample GRA98032 | |
| Goderis, S., Brandon, A. D., Mayer, B., Humayun, M., 2015, s-Process Os isotope enrichment in ureilites by planetary processing. , Earth and Planetary Science Letters, 431 , 1-Dec-15 , 110-118 , ISSN 0012-821X , http://dx.doi.org/10.1016/j.epsl.2015.09.021 . | |
| Rochette, P., Gattacceca, J., Bourot-Denise, M., Consolmagno, G., Folco, L., Kohout, T., Pesonen, L., Sagnotti, L., 2009, Magnetic classification of stony meteorites: 3. Achondrites. , Meteoritics & Planetary Science, 44 , 405-427 , http://dx.doi.org/10.1111/j.1945-5100.2009.tb00741.x . | |
| Rankenburg, K., Humayun, M., Brandon, A. D., Herrin, J. S., 2008, Highly siderophile elements in ureilites. , Geochimica et Cosmochimica Acta, 72 Issue 18 , 15-Sep-08 , 4642-4659 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2008.07.003 . | |
| Rankenburg, K., Brandon, A. D., Humayun, M., 2007, Osmium isotope systematics of ureilites. , Geochimica et Cosmochimica Acta, 71 Issue 9 , 1-May-07 , 2402-2413 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2007.02.015 . | |
| Warren, P. H., Ulff-Møller, F., Huber, H., Kallemeyn, G. W., 2006, Siderophile geochemistry of ureilites: A record of early stages of planetesimal core formation. , Geochimica et Cosmochimica Acta, 70 Issue 8 , 15-Apr-06 , 2104-2126 , ISSN 0016-7037 , http://dx.doi.org/10.1016/j.gca.2005.12.026 . | |
| Rai, V. K., Jackson, T. L., Thiemens, M. H., 2005, Photochemical Mass-Independent Sulfur Isotopes in Achondritic Meteorites. , Science, 309 , 1062-1065 , http://dx.doi.org/10.1126/science.1112954 . | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples, . | |