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Lunar Meteorite

Northwest Africa 10142

northwestern Africa

 

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Northwest Africa 10142
(photo credit: Jarkko Kettunen)

 

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Sawn face of NWA 10142
(photo credit: Jarkko Kettunen)

 

from The Meteoritical Bulletin, no. 104

Northwest Africa 10142

(Northwest Africa)
Purchased: 2014
Mass: 102 g

Classification: Lunar meteorite

History: Purchased in Mauritania by Mohamed Aid, 2014.

Physical characteristics: Single stone. A saw cut reveals a feldspathic breccia with dark-gray shock melt veins.

Petrography: (C. Agee, UNM) This meteorite is dominated by feldspathic-rich domains of fine-grained crystals and larger plagioclase fragments. Abundant shock melt veins are present, some with vesicles. Accessory troilite and ilmenite were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) olivine Fa21.3±3.6, Fe/Mn=105±5, n=2; pigeonite Fs25.5±7.9Wo12.0±1.6, Fe/Mn=57±6, n=2; augite Fs17.6±4.7Wo43.2±1.5, Fe/Mn=49±15, low Ca pyroxene Fs51.3Wo2.2, Fe/Mn=63, n=1; plagioclase An96.5±0.4Ab3.3±0.4Or0.2±0.0, n=6; Shock melt (20 µm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.6±0.5, TiO2=0.18±0.07, Al2O3=31.8±2.2, Cr2O3=0.06±0.04, MgO=3.3±1.7, FeO=3.0±1.3, MnO=0.04±0.02, CaO=17.3±0.5, NiO=0.01±0.01, Na2O=0.33±0.03, K2O=0.06±0.02 (all wt%), Fe/Mn=88±62, Mg#=64±7, MgO+FeO=6.3±2.9 (wt%), n=23.

Classification: Lunar (feldspathic breccia).

Specimens: 20.5 g including a probe mount on deposit at UNM, Jarkko Kettunen holds the main mass.

 

Randy Says…

I haven’t analyzed this one yet.

 

More Information

Meteoritical Bulletin Database

NWA  10142

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 you've found until you read this and this.


e-mail
korotev@wustl.edu

Last revised: 04-Mar-2016