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Lunar Meteorite

Northwest Africa 8046, 10309, 10609, 10649, 10756, 10822, & 11029
(presumed paired stones)

Northwestern Africa

 

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Northwest Africa 8046
(photo credit: Mike Hankey)

 

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Two slices of NWA 8046. Click on images for enlargement.
(photo credit: Mike Hankey)

 

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Two sawn faces of Northwest Africa 10609
(photo credit: Gary Fujihara)

 

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Sawn faces of Northwest Africa 10822
(photo credit: Matt Morgan)

 

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Northwest Africa 11029 in the field.
(photo credit: Ben Hoefnagels)

 

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Sawn faces of four of the smaller Northwest Africa 10309 stones. Click on image for enlargement.

(photo credit: Randy Korotev)

 

 

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Two sides of a lab sample of NWA 10609, polished on left. Click on image for enlargement. Thanks to Gary Fujihara for the sample
(photo credit: Randy Korotev)

 

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Two views of a lab sample of Northwest Africa 10649. Click on image for enlargement.
(photo credit: Randy Korotev)

 

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Two sides of another lab sample of Northwest Africa 10649. Click on image for enlargement. Thanks to Mendy Ouzillou for the sample.
(photo credit: Randy Korotev)

 

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Two views of a lab sample of Northwest Africa 10756. Click on image for enlargement.
(photo credit: Randy Korotev)

 

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Two sides (unpolished on left, polished on right) of lab sample of NWA 10822. Click on image for enlargement. Thanks to Matt Morgan for the sample.
(photo credit: Randy Korotev)

 

 

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Lab sample of Northwest Africa 11029. Click on image for enlargement
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, no. 103.

Northwest Africa 8046

(Northwest Africa)
Purchased: 2012 Dec
Mass: 47.3 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Michael Hankey in December 2012 from a dealer in Zagora, Morocco.

Physical characteristics: A single 47.3 g stone lacking fusion crust with visible whitish clasts.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of numerous mineral fragments in a finer-grained matrix. Minerals are anorthite, olivine, unexsolved pigeonite, subcalcic augite, exsolved pigeonite, fayalite, silica polymorph, ilmenite and rare kamacite.

Geochemistry: Olivine (Fa31.0-48.4, FeO/MnO = 80-97), low-Ca pyroxene (Fs58.9Wo4.7, FeO/MnO = 59), subcalcic augite (Fs11.3Wo26.9, FeO/MnO = 37), orthopyroxene host (Fs53.4Wo4.0, FeO/MnO = 53), clinopyroxene exsolution lamellae (Fs27.7Wo39.8, FeO/MnO = 52). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances (in wt.%) FeO 4.4, Na2O 0.32, and (in ppm) Sc 7.9, La 1.8, Sm 0.77, Eu 0.76, Yb 0.59, Th 0.2.

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 10.1 g (including a polished end-cut specimen, a slice and a polished mount) are at UWB. The remainder is held by Mr. M. Hankey.

 

from The Meteoritical Bulletin, No. 104

Northwest Africa 10309

(Northwestern Africa)
Purchased: 2015 August
Mass: 16,518 g

Classification: Lunar meteorite (feldspathic breccia)

History: A group of similar stones (total weight 16518 g, the largest weighing 6404 g) were found together at an undisclosed location in Mauritania, and were purchased by Darryl Pitt in August 2015 from a dealer in Mauritania.

 

Physical characteristics: All pieces lack fusion crust but the exteriors exhibit a thin desert patina. Interiors consist of angular white clasts (up to 1.5 cm across, some with minor red-brown staining) set within a fine grained, medium-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, pigeonite (some exsolved), orthopyroxene, subcalcic augite, olivine, chromite (both Ti-rich and Ti-poor varieties) in a finer grained, partly vesicular matrix containing kamacite, troilite and Ni-poor taenite.

Geochemistry: Olivine (Fa8.6-54.3, FeO/MnO = 82-96, N = 4), orthopyroxene (Fs18.7Wo2.8, FeO/MnO = 56), subcalcic augite (Fs18.1Wo31.8, FeO/MnO = 60), low-Ca pyroxene host (Fs50.4Wo6.1, FeO/MnO = 63), augite exsolution lamellae (Fs24.2Wo41.4, FeO/MnO = 50), plagioclase (An95.8-96.1Or0.2, N = 2).

Classification: Lunar (feldspathic regolithic breccia).

Specimens: 22.16 g including one polished thin section at UWB; main mass with DPitt.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10609

(Northwest Africa)
Purchased: 2016
Mass: 43.02 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Gary Fujihara from Morocco, 2016.

Physical characteristics: Single stone, weathered exterior without fusion crust. Cut and polished surface reveals numerous white feldspathic clasts set in a dark-gray groundmass. Some of the feldspathic clasts have a reddish tint.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a fragmental breccia with numerous olivine, pigeonite, and augite grains set in a dominant feldspathic matrix. Lithic and melt clasts with vesicles were also observed.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa38.9±14.5, Fe/Mn=94±8, n=11; pigeonite Fs39.4±7.5Wo9.2±6.1, Fe/Mn=61±4, n=8; augite Fs21.1±4.7Wo38.3±3.4, Fe/Mn=50±4, n=3; plagioclase An95.7±0.7, n=6.

Classification: Lunar feldspathic breccia.

Specimens: 8.66 g including a probe mount on deposit at UNM, Gary Fujihara holds the main mass.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10649

(Northwest Africa)
Purchased: 2015 December
Mass: 41.3 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Fabien Kuntz in December 2015 from a dealer in Zagora, Morocco.

Physical characteristics: A single dark gray, uncrusted stone (41.3 g) with visible whitish clasts.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of mineral clasts of anorthite, olivine, pigeonite, diopside, exsolved pigeonite, troilite, kamacite, taenite, ilmenite, fayalite and chromite in a finer matrix of the same minerals.

Geochemistry: Olivine (Fa25.0-33.7; Fa82.9; FeO/MnO = 82-87, N = 3), pigeonite (Fs45.8Wo6.8, FeO/MnO = 58), diopside (Fs7.6Wo44.9, FeO/MnO = 24, Cr2O3 = 0.8 wt.%), orthopyroxene host (Fs42.4Wo3.8, FeO/MnO = 50), clinopyroxene lamella (Fs19.4Wo40.9, FeO/MnO = 39), plagioclase (An96.3-96.5Or0.1, N = 2).

Classification: Lunar (feldspathic breccia.)

Specimens: A 8.53 g polished endcut piece is at PSF; remainder with Kuntz.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10756

(Northwestern Africa)
Purchase: 2015 September
Mass: 125 g

Lunar meteorite

History: Purchased by Eric Twelker in September 2015 from a Moroccan dealer at the Denver Show.

Physical characteristics: A single stone (125 g) lacking fusion crust and consisting of beige, white and red-brown stained clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of shocked gabbroic clasts and related crystalline debris, plus sparse devitrified glass clasts in a finer matrix containing vesicular glass. Minerals are olivine, pigeonite, exsolved pigeonite, augite, anorthite, Ti-poor chromite, Ti-rich chromite and ilmenite. Minor secondary calcite veinlets and barite are present.

Geochemistry: Olivine (Fa19.1-41.9, FeO/MnO = 69-78, N = 4), pigeonite (Fs41.0Wo5.2, FeO/MnO = 51), augite (Fs9.8Wo­, FeO/MnO = 36), low-Ca pyroxene host (Fs56.7Wo5.6, FeO/MnO = 56), clinopyroxene exsolution lamella (Fs30.2Wo39.1, FeO/MnO = 52), anorthite (An96.8Or0.2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.5 g including one polished thin section at UWB; remainder with Twelker.

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10822

(Northwestern Africa)
Purchase: 2016 September
Mass: 56 g

Lunar meteorite (feldspathic breccia)

History: Reportedly found in 2015, purchased by Matt Morgan and Lee Morgan in Morocco on June 26, 2016.

Physical characteristics: Single stone; saw cuts reveal a feldspathic breccia with numerous white feldspar clasts (1-4 mm) set in a dark-gray matrix. There are also scattered orange-brown clasts up to ~4 mm that consist primarily of pyroxene.

Petrography: (C. Agee, UNM) This meteorite is mixture of a fine-grained domains, large fragmental plagioclase crystals, and shock melt veins; some of the veins have ~100 μm-size vesicles. There are orange-brown domains consisting of pigeonite grains with augite exsolution lamellae and interstitial plagioclase or melt veins.

Geochemistry: (C. Agee and M.Spilde, UNM) olivine Fa32.7±9.0, Fe/Mn=97±4, n=11; pigeonite Fs40.7±4.8Wo8.2±3.5, Fe/Mn=59±6, n=5; augite Fs24.9±14.2Wo37.6±4.7, Fe/Mn=53±10, n=5; orange-brown pyroxene: pigeonite Fs36.4±1.6Wo5.2±3.0, Fe/Mn=61±6, n=4; augite Fs18.3±0.3Wo39.4±0.3, Fe/Mn=54±9, n=2; plagioclase An96.4±0.7Ab3.5±0.7Or0.1±0.1, n=6.

Classification: Lunar (feldspathic breccia).

Specimens: 11.7 g including a probe mount on deposit at UNM, MtMorgan and Lee Morgan hold the main mass.

 

 

 

from The Meteoritical Bulletin, No. 106

Northwest Africa 11029

(Northwest Africa)
Purchased: 2016 June
Mass: 75 g

Lunar meteorite (feldspathic breccia)

History: Purchased by Ben Hoefnagels in June 2016 from a dealer in Taliouine, Morocco.

Physical characteristics: A single stone (75 g) lacking fusion crust and exhibiting whitish to beige clasts in a medium-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular clasts of anorthite, olivine, pigeonite, subcalcic augite, augite, silica polymorph and ilmenite in a finer, fragmental matrix of the same minerals plus minor kamacite and barite.

Geochemistry: Olivine (Fa19.8-50.6, FeO/MnO = 68-83, N = 3), pigeonite (Fs24.9-39.8Wo8.4-9.6, FeO/MnO = 48-54), subcalcic augite (Fs27.6Wo29.0, FeO/MnO = 53), augite (Fs7.8Wo43.4, FeO/MnO = 30), plagioclase (An96.1-96.3Or0.1, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 15.1 g including a polished endcut at UWB; remainder with Mr. B. Hoefnagels.

 

Randy Says…

Compositionally, it's a typical feldspathic lunar meteorite.

 

More Information

Meteoritical Bulletin Database

NWA 8046 | 10309 | 10609 | 10649 | 10758 | 10822 | 11029 |

References

 

Korotev R. L. and Irving A. J. (2014) Keeping up with the lunar meteorites — 2014 (abstract). 45th Lunar and Planetary Science Conference, abstract no. 1405.

 

Korotev R. L. and Irving A. J. (2016) Not quite keeping up with the lunar meteorites – 2016. 47th Lunar and Planetary Science Conference, abstract no. 1358.

 

 

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: 08-March-2017