Graves Nunataks 06157 (GRA 06157)
Location: Graves Nunataks
Classification: Lunar-Anorthositic Breccia
Macroscopic Description: Kathleen McBride. The exterior has no fusion crust and is a gray color with white and cream colored clasts. The interior is a gray matrix with white clasts throughout.
Thin Section (,2) Description: Tim McCoy, Lauren LaCroix and Linda Welzenbach. The section shows a groundmass of comminuted pyroxene, olivine and plagioclase with grain sizes up to 1 mm. One-half of the section exhibits a darkened matrix. Olivine is Fa7-54, pyroxene ranges from Fs19-66Wo2-45 (Fe/Mn ~ 60), and plagioclase An94-97. The meteorite is lunar, probably an anorthositic regolith breccia.
At 0.79 g, it’s the smallest named lunar meteorite.
Meteoritical Bulletin Database
Korotev R. L. and Zeigler R. A. (2014) Chapter 6. ANSMET Meteorites from the Moon, Thirty-five Seasons of U.S. Antarctic Meteorites (1976–2010): A Pictorial Guide to the Collection (editors K. Righter, R. P. Harvey, C. M. Corrigan, and T. J. McCoy), 101–130, Special Publications 68, American Geophysical Union, Washington, D. C., 296 pages, ISBN: 978-1-118-79832-4.
Korotev R. L., Irving A. J., and Bunch T. E. (2008) Keeping up with the lunar meteorites – 2008. Lunar and Planetary Science XXXIX, abstract no. 1209, 39th Lunar and Planetary Science Conference.
Korotev R. L., Jolliff B. L., and Zeigler R. A. (2010) On the origin of the moon’s feldspathic highlands, pure anorthosite, and the feldspathic lunar meteorites. 41st Lunar and Planetary Science Conference, abstract no. 1440.
Zeigler R. A., Korotev R. L., and Jolliff B. J. (2012) Feldspathic lunar meteorite Graves Nunataks 06157, a magnesian piece of the lunar highlands crust. Second Conference on the Lunar Highlands Crust, abstract no. 9033.