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Lunar Meteorite

Northwest Africa 8010

Morocco

 

lm_nwa_8010_hand_elcaid.jpg

Northwest Africa 8010 in hand
(photo credit: Youssef Ait Elcaid)

 

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lm_nwa 8010_mm.jpg

Slices of NWA 8010 in another hand
(photo credit: Carl Agee and Matt Morgan)


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Lab sample of NWA 8010. Thanks to Carl Agee for the sample.
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, No. 102

Northwest Africa 8010

Morocco
Found: 2013
Mass: 58 g

Classification: Lunar meteorite (feldspathic breccia)

History: Reported found near Zagora, 2013.

Physical characteristics: Single stone, gray-brown fusion crust, black melt veins visible through the crust. Saw cut reveals dark breccia clasts with fragmental feldspar and light fine-grained clasts up to 1-2 cm, bounded by black shock melt veins 1-4 mm wide, melt veins contain vesicles up to 1 mm.

Petrography: (C. Agee, UNM) Fragmental breccia with melt veins. Anorthositic and gabbroic clasts, fragmental plagioclase, pyroxene, olivine, oxides and sulfides set in a cataclastic groundmass. Abundant glassy melt veins with suspended submicron metal/sulfide blebs, plumose quench crystal zones up to 1 mm wide at groundmass cooling contacts. Vesicles confined mostly in the center of melt veins. Shock melt spherule 500 µm.

Geochemistry: (C. Agee and N. Muttik, UNM). Olivine Fa31.7±7.5, Fe/Mn=93±5, n=14; forsteritic olivine Fa7.4±1.5, Fe/Mn=100±16, n=2; pyroxene Fs33.8±11.1Wo17.0±9.9, Fe/Mn=57±7, n=21; plagioclase An96.2±1.3Ab3.4±1.2Or0.4±0.2, n=10; glassy impact melt (mean value from EMPA with 20 µm beam) SiO2=45.55±1.28, TiO2=0.52±0.23, Al2O3=25.34±2.86, Cr2O3=0.13±0.03, MgO=7.54±2.21, FeO=5.99±1.03, MnO=0.08±0.03, CaO=14.35±1.41, Na2O=0.42±0.16, K2O=0.16±0.07 (all wt%), n=7.

Classification: Achondrite (lunar meteorite). Feldspathic impact melt breccia. Chemical composition of glassy impact melt (proxy for bulk composition) is that of high-alumina basalt.

Specimens: A total of 11.6 g, including a probe mount, is on deposit at UNM, MtMorgan and Reed hold the main mass.

 

Randy Says…

May be paired with NWA 10973. Both have vesicular melt veins and pockets

 

More Information

Meteoritical Bulletin Database

NWA 8010

References

Korotev R. L. and Irving A. J. (2017) Still not keeping up with the lunar meteorites – 2017. 48th Lunar and Planetary Science Conference, abstract no. 1498.

Miley H. M., Agee C. B., Korotev R. L., Muttik N., and Morgan M. (2014) Northwest Africa 8010: Feldspathic regolith breccia with abundant crystalline lunar spherules. 45th Lunar and Planetary Science Conference, abstract no. 2823.

 

 

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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 you've found until you read this and this.


e-mail
korotev@wustl.edu

Last revised: 9-March-2017