Lunar Meteorite

Northwest Africa 12008

northwestern Africa

 

Northwest Africa 12008 

(photo credit: Neil Buckland)

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 12008

 

Morocco

Purchased: 2018 August

Mass: 577 g

 

Lunar Meteorite (basalt)

 

History: Purportedly found in Morocco and purchased by Ben Hoefnagels in August 2018 from a dealer in Zagora, Morocco.

 

Petrography: (A. Irving and S. Kuehner, UWS) Small olivine phenocrysts (stained orange-brown) are set in an intersertal groundmass composed mainly of zoned clinopyroxene and elongate lath-like maskelynite with accessory skeletal ilmenite, Ti-chromite, Cr-Ti-Fe spinel, troilite and minor barite. Olivine contains inclusions of chromite and quenched melt inclusions (surrounded by radial cracks) composed of Al-Ti-bearing augite + K-bearing glass.

 

Geochemistry: Olivine (cores Fa36.6-42.3, rim Fa90.0, FeO/MnO = 96-99, N = 3), pigeonite (Fs31.1Wo14.0, FeO/MnO = 50), subcalcic augite (Fs25.9-71.4Wo28.6-23.1, FeO/MnO = 50-75, N = 5), augite (Fs23.2Wo39.7, FeO/MnO = 49), ferropigeonite (Fs80.1Wo19.5, FeO/MnO = 79), augite in melt inclusion (Fs28.8Wo50.1, FeO/MnO = 71, Al2O3 = 10.5 wt.%, TiO2 = 5.3 wt.%), plagioclase (An86.8-87.6Or0.4-0.3, N = 2).

 

Classification: Lunar (mare basalt).

 

Specimens: 25.2 g including two polished thin sections at UWB; remainder with Mr. B. Hoefnagels.

 

Randy Says…

I have not studied this one. The composition given in Cohen et al. (2019) is all but indistinguishable from that of NWA 032/479, but the texture is different.

 

More Information

Meteoritical Bulletin Database

NWA 12008

References

 

Cohen M. E., Kuehner S. M., Tepper J. H., Burney D. C., Neal C. R., Irving A. J., Korotev R. L., and B. Hoefnagels (2019) Mineralogy and bulk composition of lunar mare basalt Northwest Africa 12008 (abstract). 50th Lunar and Planetary Science Conference, abstract no. 2508.

 

Webb S., Neal C. R., Gawronska A., and Day J. M. D. (2019) Crystal size distribution patterns for lunar meteorites Northwest Africa 12008, 4898, 8632, 3136 and three LaPaz Icefield lunar meteorites (abstract). 50th Lunar and Planetary Science Conference, abstract no. 2686.

 

 

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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.

 

e-mailkorotev@wustl.edu

Last revised: 23 September 2019