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Lunar Meteorite

Northwest Africa 12384

northwestern Africa

 

from The Meteoritical Bulletin, No. 108

 

Northwest Africa 12384

 

(Northwestern Africa)

Purchase: November 2018

Mass: 244 g

 

Lunar meteorite (basaltic breccia)

 

History: Purchased in Agadir, Morocco, in November 2018 by Aziz Habibi.

 

Physical characteristics: Two dense stones (total 244 g) coated by a thin, dark brown patina, but exhibiting a very fresh, gray interior with some visible basaltic clasts.

 

Petrography: (P. Carpenter, WUSL and A. Irving, UWS) The specimen is a breccia consisting of rounded mare basalt clasts with intersertal texture set in a matrix of related crystalline debris. Major mineral phases are olivine, pigeonite (some zoned to ferropigeonite) and anorthite with accessory ilmenite, merrillite, fluorapatite, troilite, zirconolite, tranquillityite and FeNi metal. The basalt clasts also contain K-rich mesostasis. A fine grained vesicular shock vein crosscuts the studied sample.

 

Geochemistry: Olivine in breccia matrix (Fa30.0-50.4, FeO/MnO = 93-113, N = 6), pigeonite in breccia matrix (Fs30.6-31.8Wo10.4-22.7, FeO/MnO = 54-58, N = 2), pigeonite in basalt clast (cores Fs28.9-29.4Wo7.9-8.4, FeO/MnO = 50-56, N = 3; rims Fs44.8-79.6Wo16.3-20.4, FeO/MnO = 59-88, N = 3), subcalcic augite in breccia matrix (Fs24.6Wo31.5, FeO/MnO = 59), plagioclase in breccia matrix (An81.1-95.6Or1.1-0.1, N = 2), plagioclase in basalt clast (An82.3-89.7Or0.7-0.4, N = 4).

 

Classification: Lunar (mare basalt breccia).

 

Specimens: 22.3 g including one polished endcut and one polished thin section at UWB; remainder with Labenne

 

Randy SaysÖ

I havenít analyzed this one.

 

More Information

Meteoritical Bulletin Database

NWA 12384

References

Carpenter P. K., Jolliff B. L., Korotev R. L., Tepper J. H., Irving A. J., and Hahn Jr T.M. (2019) Quantitative EPMA compositional mapping of lunar mare basalt breccia Northwest Africa 12384. 50th Lunar and Planetary Science Conference, abstract no. 2148.

Carpenter P. K., Jolliff B. L., Korotev R. L., Tepper J. H., Irving A. J., and Labenne L. (2019) Petrology and bulk composition of lunar mare basalt breccia Northwest Africa 12384. 50th Lunar and Planetary Science Conference, abstract no. 2125.

 

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Prepared by: Randy L. Korotev

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

Please donít contact me about the meteorite you think that
youíve found until you read this and this.

 

e-mailkorotev@wustl.edu

Last revised: 30 May 2019