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Lunar Meteorite

Northwest Africa 12697

Northwestern Africa

 

from The Meteoritical Bulletin, No. 108

Northwest Africa 12697

(Northwestern Africa)
Purchased: 2018 June
Mass: 140 g

Lunar meteorite (feldspathic breccia)

History: Purchased from a mineral dealer in Marrakech, Morocco. Purportedly found near Tindouf, Algeria.

Petrography: (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments (olivine, pyroxene, plagioclase) and lithic clasts (anorthosites, melt rocks, basalt), set in a nearly black matrix of fine-grained related debris. Intermingled are clast-rich melt particles with ill-defined outlines. Pyroxenes with and without exsolution lamellae are observed. Accessories are Fe,Ni metal, ilmenite, and troilite.

Geochemistry: Mineral compositions and geochemistry: Olivine: Fa35.4±8.0 (24.5-50.5); Fe/Mn (at.): 88-116; n=7. Pyroxene Fs35.3±11.8Wo12.3±5.9 (Fs22.3-53.0Wo3.9-21.8); Fe/Mn (at.): 44-87; n=11. Plagioclase An95.7±2.3 (An91.0-98.8); n=8.

Classification: Lunar feldspathic breccia.

Specimens: 20 g type specimen at IfP. Stephan Decker, Meteorite Museum, Oberwesel, German holds the main mass.

 

 

Randy Says…

I have not studied this one. The description is similar to that of NWA 12603.

 

More Information

Meteoritical Bulletin Database

NWA 12697

 

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: 9 July 2019