Sample Petrographic Description
Sample Number | LAR 06638 |
Newsletter | 30,2 |
Location | Larkman Nunatak |
Field Number | 19362 |
Dimensions (cm) | 2.5 x 2.0 x 0.75 |
Weight (g) | 5.29 |
Original Classification | Lunar-Anorth. Breccia |
Mineral Composition (%Fa & %Fs) | |
Fayalite (mol%): 28-33;Ferrosilite (mol%): 27-39 | |
Weathering | |
A/B | |
Fracturing | |
A/B | |
Macroscopic Description - Kathleen McBride | |
The bottom exterior surface has black fusion crust, while the top has a lighter brown crust. Polygonal fractures are present. The gray and white matrix has a sharp line where matrix becomes black with white inclusions. | |
Thin Section Description (,2) - Tim McCoy, Lauren LaCroix, Linda Welzenbach | |
The section shows a groundmass of comminuted pyroxene, olivine and plagioclase with grain sizes up to 1 mm. Clasts up to 2 mm include basalts, granulites and anorthosites. One-half of the section exhibits a darkened matrix. Olivine is Fa28-33, pyroxene ranges from Fs27-39Wo3-12 (Fe/Mn ~ 60), and plagioclase An93-98. The meteorite is lunar, probably an anorthositic regolith breccia. |
Antarctic Meteorite Images for Sample LAR 06638 | ||||
Lab Photo(s) : | ||||
Antarctic Meteorite Images for Sample LAR 06638 | ||||
Thin Section Photo(s) : | ||||
References for Sample LAR06638 | |
Korotev, R.L., and Zeigler, R.A., 2015, ANSMET Meteorites from the Moon. 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. 101-130. | |
Rochette, P., Gattacceca, J., Ivanov, A. V., Nazarov, M. A., Bezaeva, N. S., 2010, Magnetic properties of lunar materials: Meteorites, Luna and Apollo returned samples. Earth and Planetary Science Letters, 292 Issues 3-4, 1-Apr-10, 383-391, ISSN 0012-821X, http://dx.doi.org/10.1016/j.epsl.2010.02.007. |