from The Meteoritical Bulletin, No. 108
Saguia el Hamra, Western Sahara
Lunar meteorite (gabbro)
History: Two large stones (2338 g, 1754 g) and several smaller stones were found together. One stone (177 g) was purchased by Darryl Pitt in November 2018. The 1754 g stone was purchased by Aziz Habibi in January 2019, and subsequently acquired by Darryl Pitt, who independently purchased three additional stones from several Mauritanian dealers in March 2019.
Physical characteristics: All stones lack fusion crust. Fresh interiors have a mottled dark gray appearance with a relatively coarse grained, equigranular texture.
Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Coarse grained, with a gabbroic texture (mean grainsize 1.5 mm). Composed of patchily zoned clinopyroxene, maskelynite, and olivine, with accessory ilmenite, troilite, tranquillityite, Th-free monazite and rare kamacite. Minor secondary calcite and hyalophane were observed on some grain boundaries.
Geochemistry: Olivine (Fa66.6-84.2, FeO/MnO = 92-102, N = 3), pigeonite cores (Fs30.1-31.6Wo13.4-10.4, FeO/MnO = 53, N = 2), pigeonite rim (Fs44.4Wo12.5, FeO/MnO = 59), subcalcic augite rim (Fs46.9Wo32.8, FeO/MnO = 71), maskelynite (An85.1-89.1Or0.8-0.3, N = 2).
Classification: Lunar (mare gabbro).
Specimens: 46.9 g including one polished thin section and one polished endcut at UWB; remainder with DPitt.
I have not studied Swayyah 001. Preliminary data show concentrations of incompatible elements to be very low.
Meteoritical Bulletin Database
Shi E., Carpenter P. K., Jolliff B. L., Chen J., Wang A., Tepper J. H., Irving A. J., Burney D. C., Neal C. R. (2020) Mineralogical and petrological analysis of lunar mare gabbro meteorite Swayyah 001 (abstract #2923). 50th Lunar and Planetary Science Conference.