Sample Petrographic Description
Sample Number | SCO 06040 |
Newsletter | 30,2 |
Location | Scott Glaciers |
Field Number | 17705 |
Dimensions (cm) | 5.5 x 4.5 x 2.0 |
Weight (g) | 60.16 |
Original Classification | Howardite |
Mineral Composition (%Fa & %Fs) | |
Ferrosilite (mol%): 19-65 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
50% of the exterior surface has shiny black fusion crust. The gray matrix has angular clasts of various sizes and colors. | |
Thin Section Description - Tim McCoy, Lauren LaCroix, Linda Welzenbach | |
The meteorite is a breccia of basaltic clasts, orthopyroxene grains, and coarse-grained orthopyroxenites in a comminuted matrix. Clasts reach up to 1 mm. Carbonaceous chondrite (presumably CM2) clasts up to 2 mm are present. Pyroxene compositions range over Fs19-65Wo2-44 (Fe/Mn~23-37). Plagioclase is An88-94Or1. Within the carbonaceous clasts, olivine is Fa0-1 and pyroxene is Fs7. The meteorite is a howardite. |
Antarctic Meteorite Images for Sample SCO 06040 | ||||
Lab Photo(s) : | ||||
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Antarctic Meteorite Images for Sample SCO 06040 | ||||
Thin Section Photo(s) : | ||||
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References for Sample SCO06040 | |
Righter, K., Holmwood, A.P., 2020, Mineralogy and petrology of dark clasts in the Allan Hills 76005 polymict eucrite pairing group. Meteoritics & Planetary Science, 55, 781-799, doi: 10.1111/maps.13465. | |
Greenwood, R. C., Burbine, T. H., Miller, M. F., & Franchi, I. A. , 2017, Melting and differentiation of early-formed asteroids: The perspective from high precision oxygen isotope studies. . Chemie Der Erde-Geochemistry, 77, 1-43, http://dx.doi.org/10.1016/j.chemer.2016.09.005. | |
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. | |
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. |