E&PS_WU_logo.jpg

 

Lunar Meteorite

Northwest Africa 6721

Morocco

 

Two sides of one of the Northwest Africa 6721 stones
(photo credit: Randy Korotev)

 

Two slices from another stone of NWA 6721
(photo credit: Jack Schrader)

 

A thin section of NWA 6721
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, no. 100

Northwest Africa 6721

Morocco
Find: 2010 November
Mass: 184 g

Lunar meteorite (feldspathic breccia)

History: Multiple stones were found together on Hamada du Dra, Morocco, in late 2010 and purchased by Jack Schrader in April 2010 from a dealer in Taliouine, Morocco.

Physical characteristics: A total of 17 dark gray, uncrusted stones (combined weight 184 g) containing small white clasts.

Petrography: (A. Irving and S. Kuehner, UWS) A fine grained, heterogeneous, fragmental breccia composed of mineral clasts and ophitic-textured lithic clasts. Mineral clasts include anorthitic plagioclase, orthopyroxene, subcalcic augite, pigeonite, olivine (some very fayalitic), sparse intergrowths of hedenbergite+fayalite+silica (after former pyroxferroite), ilmenite, irregular kamacite grains and troilite.

Geochemistry: Pigeonite (Fs21.6-27.8Wo5.9-12.4, FeO/MnO=49-58), orthopyroxene (Fs32.3Wo3.1, FeO/MnO=61), subcalcic augite (Fs18.2-29.8Wo33.2-27.9, FeO/MnO=42-47), olivine (Fa52.2-85.5, FeO/MnO=90-100), plagioclase (An95.9-97.9Or0.1-0.2). Bulk composition (R. Korotev, WUSL): FeO 5.0 wt%, La 3.5 ppm, Sm 1.6 ppm, Yb 1.25 ppm, Th 0.60 ppm.

Classification: Achondrite (lunar, feldspathic breccia).

Specimens: A total of 20.2 g of sample (3 stones) are on deposit at UWS. The main masses are held by J. Schrader.

 

Randy Says

Compositionally similar to NWA 6481 but different in detail.

 

More Information

Meteoritical Bulletin Database

NWA 6721

References

 

Korotev R. L., Irving A. J., and Bunch T. E. (2012) Keeping Up With the Lunar Meteorites 2012 (abstract). In Lunar and Planetary Science XLIII, abstract no. 1152, 43rd Lunar and Planetary Science Conference.

 

 

Back to: Lunar Meteorites | List of Lunar Meteorites | Top of Page

 


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: 14-Oct-2015