Lunar Meteorite

Shişr 166





Shişr 166 in the desert and on display

(photo credit: Luc Labenne)




Shişr 166 has vesicles, some of which are now filled with carbonate and sulfate minerals from terrestrial weathering. Click on image for enlargement.

(photo credit: by Randy Korotev)



Photomicrograph of a thin section of Shişr 166
(photo credit: Axel Wittmann)


from The Meteoritical Bulletin, No. 98, Meteoritics & Planetary Science 45, 1530–1551 (2010)

Shişr 166

Zufar, Oman
Found: 10 Apr 2008
Mass: 128.8 g

Lunar (feldspathic melt breccia)

History: One stone was found by Luc Labenne in the desert at night.


Physical characteristics: The 128.8-g meteorite lacks an obvious fusion crust. The interior consists of a gray, vesicular (up to 1.2 mm vesicles) melt matrix with rounded clasts stained red by hematite. Many vesicles are filled with terrestrial alteration products, including calcite, Ca-sulfate, and celestite.

Petrography: (R. Zeigler, WUSL) Melt matrix dominated by plagioclase (average: An96.7Or0.2) with intergrown of pigeonite (average Fs50Wo27; Fe/Mn = 57), augite (Fs60Wo27; Fe/Mn = 48), and olivine (Fo61; Fe/Mn = 102) in an apparent poikilitic texture. Also present within the matrix are small grains of troilite, Cr,Ti,Fe spinel (19 wt% TiO2, 25 wt% Cr2O3 , 23 wt% FeO), and ilmenite (5 wt% MgO, 1.5 wt% Cr2O3), the latter two often intergrown. There are a few plagioclase clasts (typically 0.2 mm, up to ~1 mm) and a few smaller olivine and pyroxene clasts. Large veins of partially devitrified shock melt occur. Average composition of the shock-melt vein: 43.7% SiO2, 0.24% TiO2, 29.7% Al2O3, 4.3% FeO, 0.07% MnO (Fe/Mn = 63), 4.0% MgO (Mg´ = 63), 16.8% CaO, 0.32 wt% Na2O, and 0.03 wt% K2O.

Geochemistry: Bulk Chemistry: (R. Korotev, WUSL): 0.32% Na2O, 4.1% FeO, 7.9 ppm Sc, 140 ppm Ni, 1.2 ppm Sm.

Classification: Achondrite (lunar, impact-melt breccia).


Specimens: 20.1 g are on deposit at WUSL, the main mass is held by Labenne.


Randy Says…

It's the only lunar meteorite to have been found at night!

It is compositionally indistinguishable from Dhofar 026 and its pair Dhofar 457–468, but Shisr 166 is distinctly different in texture.


More Information

Meteoritical Bulletin Database

Shişr 166


Schematic Map of the Find Locations of the Dhofar Lunar Meteorites


Bouvier A., Wadhwa M., Korotev R. L., and Hartmann W. K. (2011) U-Pb chronology of two lunar impact melt breccias (abstract). 74th Annual Meeting of the Meteoritical Society, abstract no. 5185.

Korotev R. L. (2012) Lunar meteorites from Oman. Meteoritics & Planetary Science 47, 1365–1402. doi: 10.1111/j.1945-5100.2012.01393.x

Korotev R. L. (2017) Update (2012–2017) on lunar meteorites from Oman. Meteoritics & Planetary Science 52, 1251-1256.
All Korotev data on Omanian lunar meteorites.

Korotev R. L., Irving A. J., and Bunch T. E. (2012) Keeping Up With the Lunar Meteorites — 2012 (abstract). In Lunar and Planetary Science XLIII, abstract no. 1152, 43rd Lunar and Planetary Science Conference.

Korotev R. L and Irving A. J. (2013) Keeping up with the lunar meteorites - 2013 (abstract). In Lunar and Planetary Science XLIV, abstract no. 1216, 44th Lunar and Planetary Science Conference.

Mészáros M., Leya I., and Hofmann B. A. (2016) Noble gases in the two lunar meteorites AaU 012 and Shişr 166. 79th Annual Meeting of the Meteoritical Society, abstract no. 6129.

Mészáros M., Leya I., and Hofmann B. A. (2017) Cosmic-ray exposure histories of the lunar meteorites AaU 012 and Shişr 166. Meteoritics & Planetary Science 82, 2040–2050. doi: 10.1111/maps.12904



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Prepared by: Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don’t contact me about the meteorite you think that
you’ve found until you read this and this.



Last revised: 28 January 2018