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Lunar Meteorite

Northwest Africa 12270

northwestern Africa

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 12270

 

Mauritania

Purchased: 2018

Mass: 1300 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purchased by Terry Boudreaux from a meteorite dealer in Mauritania.

 

Physical characteristics: Six identically appearing pieces, no fusion crust, saw cut reveals a fragmental breccia with numerous white feldspathic clasts set in a dark gray ground mass.

 

Petrography: C. Agee, UNM) This meteorite consists of primarily of fragmental pyroxene, olivine, feldspathic clasts and shock melt. Ubiquitous Ti-rich chromite and ilmenite present, rare Fe-Ni metal detected.

 

Geochemistry: (C. Agee, UNM) olivine Fa42.7±7.3, Fe/Mn=94±9, n=14; pigeonite Fs37.0±8.0Wo17.9±6.9­, Fe/Mn=56±5, n=13; plagioclase An­, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.8±1.3, TiO2=0.31±0.08, Al2O3=26.0±3.9, Cr2O3=0.15±0.09, MgO=5.0±2.2, FeO=5.9±1.7, MnO=0.08±0.03, CaO=16.1±1.8, NiO=0.02±0.01, Na2O=0.44±0.07, K2O=0.08±0.01 (all wt%), n=7.

 

Classification: Lunar feldspathic breccia

 

Specimens: 29.2 g including a probe mount on deposit at UNM, Terry Boudreaux holds the main mass.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

NWA 12270

References

 

 

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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: 10 December 2018