Sample Petrographic Description
| Sample Number | SAN 03472 |
| Newsletter | 29,2 |
| Location | Sandford Cliffs |
| Field Number | 14959 |
| Dimensions (cm) | 5.5 x 6.0 x 2.5 |
| Weight (g) | 195.24 |
| Original Classification | Howardite |
| Mineral Composition (%Fa & %Fs) | |
| Ferrosilite (mol%): 20-52 | |
| Weathering | |
| B | |
| Fracturing | |
| A/B | |
| Macroscopic Description - Cecilia Satterwhite | |
| Exterior has brown/black dull fusion crust with rust and fractures. The interior is a fine grained tan matrix with mm sized light, dark and weathered inclusions. | |
| Thin Section Description (,2) - Tim McCoy | |
| The section shows a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic clasts ranging up to 1 mm. Most of the pyroxene is orthopyroxene with compositions ranging from Fs20-52Wo1-4 and a single augite of Fs22Wo42. The Fe/Mn ratio of the pyroxene is ~30. Plagioclase is An92Or0.2. | |
| Antarctic Meteorite Images for Sample SAN 03472 | ||||
| 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 SAN03472 | |
| Moriarty, D. P., Pieters, C. M., 2016, Complexities in pyroxene compositions derived from absorption band centers: Examples from Apollo samples, HED meteorites, synthetic pure pyroxenes, and remote sensing data. , Meteoritics & Planetary Science, 51(2) , 207-234 . | |
| Mittlefehldt, D. W., 2015, Asteroid (4) Vesta: I. The howardite-eucrite-diogenite (HED) clan of meteorites. , Chemie der Erde - Geochemistry, 75 Issue 2 , Jun-15 , 155-183 , ISSN 0009-2819 , http://dx.doi.org/10.1016/j.chemer.2014.08.002 . | |
| Cartwright, J. A., Ott, U., Mittlefehldt, D. W., 2014, The Quest for Regolithic Howardites Part 2: Surface Origins Highlighted by Noble Gases. , Geochimica et Cosmochimica Acta, 140 , 488-508 . | |
| Mittlefehldt, D. W., Herrin, J. S., Quinn, J. E., Mertzman, S. A., Cartwright, J. A., Mertzman, K. R., Peng, Z. X., 2013, Composition and petrology of HED polymict breccias: The regolith of (4) Vesta. , Meteoritics & Planetary Science, 48 , 2105-2134 , http://dx.doi.org/10.1111/maps.12182 . | |
| RELAB, , Reflectance Experiment Lab , catalogue of samples, . | |