E&PS_WU_logo.jpg

 

Lunar Meteorite

Northwest Africa 8222, 11212,
Rabt Sbayta 002, 004, 005,
unnamed 106 & unnamed 115
(presumed paired stones)

northwestern Africa

 

lm_nwa8222_M1633_2.jpg

Northwest Africa 8222
(photo credit: Adam Aaronson)

 

lm_nwa8222_M1633_4.jpg

Sawn face of NWA 8222
(photo credit: Adam Aaronson)

 

 

Northwest Africa 10212
(photo credit: Fabien Kuntz)

 

Two sides of a slice of one of the NWA 10212 pieces
(photo credit: Fabien Kuntz)

lm_Rabt_Sbayta_002_1436.jpg

Ahmad Ourbaa with 6.4 kg Rabt Sbayta 002
(photo credit: ?)

 

Rabt Sbayta 004
(photo credit: ?)

 

Two of the Rabt Sbayta 005 pieces
(photo credit: Jean Redelsperger)

 

 

lm_nwa_SH88b.jpg

lm_nwa_SH88a.jpg

Two sides of unnamed 106
(photo credit: ?)

 

 

lm_nwa_8222_inaa_1066.jpg

Lab samples of NWA 8222
(photo credit: Randy Korotev)

 

lm_rs002_3375s.jpg

lm_rs002_3376s.jpg

Lab sample of Rabt Sbayta 002
photo credit: Randy Korotev)

 

 

Lab sample of Rabt Sbayta 004
photo credit: Randy Korotev)

 

lm_nwa_SH88_DSC_2765m.jpg

Lab sample of unnamed 106
photo credit: Randy Korotev)

 

lm_nwa_AB#41_3346s.jpg

lm_nwa_AB#41_3347s.jpg

Lab sample of unnamed 115
photo credit: Randy Korotev)

 

 

from The Meteoritical Bulletin, No. 103

Northwest Africa 8222

(Northwest Africa)
Purchased: 2013 Dec
Mass: 208.6 g

Classification: Lunar meteorite (feldspathic breccia)

History: The stone was purportedly found near Bir Anzarane, and was purchased in Temara, Morocco, by Adam Aaronson in December 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of separated, angular mineral clasts in a finer-grained, vesicular matrix. Minerals are olivine, anorthite, exsolved pigeonite, augite, chromite, ilmenite, troilite and minor pentlandite.

Geochemistry: Olivine (Fa42.5; Fa80.6; FeO/MnO = 106-134), augite (Fs18.4Wo40.6; FeO/MnO = 54), pigeonite consists of host orthopyroxene (Fs50.1-50.9Wo2.5-5.1; FeO/MnO = 58-64) with exsolution lamellae of augite (Fs38.6Wo41.2; FeO/MnO = 67). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 3.7, Na2O 0.37; (in ppm) Sc 7.0, Ni 90, La 1.4, Sm 0.62, Eu 0.82, Yb 0.54, Lu 0.076, Hf 0.43, Th 0.20.

Classification: Lunar (feldspathic fragmental breccia).

Specimens: A 20.1 g specimen with one polished surface is at UWB. The main mass is held by Aaronson.

 

from The Meteoritical Bulletin, No. 106

Northwest Africa 11212

(Northwest Africa)
Purchased: 2016 Nov
Mass: 197.5 g

Classification: Lunar meteorite (feldspathic breccia)

History: Purportedly found buried in soil in the strewnfield near Gataa Sfar and purchased by Fabien Kuntz in November 2016 from a dealer in Zagora, Morocco.

Physical characteristics: A group of small stones (total 197.5 g) lacking fusion crust. Fresh interiors exhibit white to beige clasts in a dark gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral grains of anorthite, olivine, pigeonite, ferropigeonite, subcalcic augite, augite, Ti-chromite and ilmenite in a finer grained, partly vesicular matrix containing kamacite, troilite, pentlandite, Mg-ilmenite and minor barite. Small bubbles are concentrated in groups within the matrix.

Geochemistry: Olivine (Fa28.7-36.1, FeO/MnO = 102-116, N = 3), orthopyroxene (Fs53.4Wo1.7, FeO/MnO = 78), pigeonite (Fs20.6Wo7.8, FeO/MnO = 67), ferropigeonite (Fs56.3Wo21.1, FeO/MnO = 66), subcalcic augite (Fs29.4Wo26.4, FeO/MnO = 71), augite (Fs9.9Wo37.0, FeO/MnO = 68), plagioclase (An94.2-96.7Or0.3, N = 2).

Classification: Lunar (feldspathic breccia). Likely paired with Rabt Sbayta 002 and Rabt Sbayta 004.

Specimens: 20.28 g including one polished endcut at PSF; remainder with Kuntz.

 

from The Meteoritical Bulletin, No. 106

Rabt Sbayta 002

Rio de Oro, Western Sahara
Find: 2016 August
Mass: 6371.9 g

Classification: Lunar meteorite (feldspathic breccia)

History: Found by Mbarek Laghfiri and Mohamed Chikh Boy near Gataa Sfar in August 2016 and shortly thereafter. Purchased by Darryl Pitt from a Morrocan dealer in Agadir.

Physical characteristics: A single large stone (6371.9 g) lacking fusion crust but with a thin desert patina on exterior surfaces. The fresh interior exhibits pale gray to whitish clasts set in a dark gray, fine grained matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular minerals clasts of anorthite, orthopyroxene, olivine, pigeonite, exsolved pigeonite, ilmenite, chromite, fayalite and Ti-chromite in a fine grained, partly vesicular matrix of the same minerals plus troilite and minor barite. Rare quench-textured lithic clasts are present.

Geochemistry: Olivine (Fa23.4, FeO/MnO = 64; Fa43.9, FeO/MnO = 100), orthopyroxene (Fs58.6-60.4Wo2.4-1.9, FeO/MnO = 57-72, N = 2), pigeonite (Fs44.6Wo7.9, FeO/MnO = 54; Fs27.8Wo21.3, FeO/MnO = 47), augite host in exsolved pigeonite (Fs20.9Wo38.4, FeO/MnO = 54), fayalite (Fa78.1, FeO/MnO = 81), plagioclase (An96.5-97.2Or0.2, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 3.5, Na2O 0.37; (in ppm) Sc 7.2, Ni 90, La 1.1, Sm 0.57, Eu 0.82, Yb 0.50, Lu 0.07, Hf 0.35, Th 0.14. Magnetic susceptibility log χ (× 10-9 m3/kg) = 2.49.

Classification: Lunar (feldspathic breccia).

Specimens: 22.9 g in the form of a single polished slice at UWB; remainder with DPitt.

 

from The Meteoritical Bulletin, No. 106

Rabt Sbayta 004

Rio de Oro, Western Sahara
Find: 2016 October
Mass: 15,464 g

Classification: Lunar meteorite (feldspathic breccia)

History: Found by Mbarek Laghfiri and Mohamed Chikh Boy near Gataa Sfar in August 2016 and shortly thereafter. Purchased by Darryl Pitt from a Morrocan dealer in Agadir.

Physical characteristics: Found in October 2016 by Oubnaamar Salem in the lunar meteorite strewnfield near Gataa Sfar, and subsequently purchased by Darryl Pitt in December 2016 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of angular mineral grains of anorthite, orthopyroxene, pigeonite (some exsolved), augite, olivine, ilmenite, Cr-rich chromite, Ti-chromite, silica polymorph, fayalite, kamacite and troilite in a finer grained matrix of the same minerals. Portions of the matrix are vesicular and minor calcite is present.

Geochemistry: Olivine (Fa38.5-84.1, FeO/MnO = 70-86, N = 5), low-Ca pyroxene (Fs32.7-38.9Wo2.2-5.3, FeO/MnO = 58-73, N = 4), augite (Fs8.5-20.3Wo45.7-40.7, FeO/MnO = 70-71, N = 3), plagioclase (An94.6-97.3Or0.4-0.22, N = 3).

Classification: Lunar (feldspathic breccia). Likely paired with NWA 8222 and Rabt Sbayta 002 found in the same area.

Specimens: 24.4 g in the form of a two polished endcuts at UWB; remainder with DPitt.

 

from The Meteoritical Bulletin, No. 106

Rabt Sbayta 005

Rio de Oro, Western Sahara
Find: 2016 August
Mass: 20.78 g

Classification: Lunar meteorite (feldspathic breccia)

History: The four fragments were found on a deflation surface by Salem Ben Amar and Amar Zerwal in August 2016. They were purchased from Mohamed Elguirah by Jean Redelsperger in Tan Tan in September 2016.

Physical characteristics: Uncrusted, irregular, dark stones with whitish clasts. Cut surface reveals dark interior with white clasts up to 2 mm.

Petrography: (J. Gattacceca, CEREGE) Brecciated with lithic and mineral clasts (olivine, pigeonite, plagioclase) in a very fine grained plagioclase matrix. Numerous vesicles with diameter 10-20 μm. are present in the matrix. Accessory minerals include chromite, ilmenite. Rare kamacite.

Geochemistry: Olivine Fa33.9±3.3, range Fa31.4-41.2, FeO/MnO = 85.8±9.7 (range 67-98), N=6. Pigeonite Fs40.5±0.8Wo10.2±3.1, FeO/MnO=54.0±6.5 (N=5). Plagioclase An96.5±0.6Ab3.4±0.6Or0.1±0.0 (N=4). Chromite Cr#=Cr/(Cr+Al)=0.64-0.67 (N=2). Magnetic susceptibilty log χ (× 10-9 m3/kg) = 2.58.

Classification: Lunar (feldspathic breccia). Likely paired with Rabt Sbayta 002 and Rabt Sbayta 004 found in the same area.

Specimens: 4.44 g and polished section at CEREGE. Main mass with Jean Redelsperger.

 

Randy Says…

Compositionally, Northwest Africa 8222 and pairs are typical feldspathic lunar meteorite.

 

More Information

Meteoritical Bulletin Database

NWA 8222 | 11212 | Rabt Sbayta 002 | Rabt Sbayta 004 | Rabt Sbayta 005

References

 

Korotev R. L. and Irving A. J. (2015) Keeping up with the lunar meteorites - 2015. 46th Lunar and Planetary Science Conference, abstract no. 1942.

 

 

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: 28-April-2017