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Northwest Africa 10641
Basic information Name: Northwest Africa 10641
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10641
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 110.3 g
Meteoritical Bulletin:  MB 105  (2016)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 24 May 2016
Writeup from MB 105:

Northwest Africa 10641 (NWA 10641)


Purchased: 2015 Sept

Classification: HED achondrite (Eucrite)

History: A single stone of 110.3 g was found by an anonymous finder in Western Sahara and purchased 2015 in Erfoud by Hichame Mimaghador.

Physical characteristics: The main mass is partially covered by a black fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The thin section analyzed displays a basaltic texture. The major phase is orthopyroxene, with crystals 80-130 μm in width, minor clinopyroxene and anorthitic plagioclase. Exsolved low-Ca pyroxene crystals displaying fine, 4-6 μm pigeonite exsolution lamellae, are visible. Minor phases are ilmenite, troilite, chromite, and FeNi metal

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Calcic plagioclase An 90.0±1.2Or0.5±0.1, n=7; low-Ca pyroxene (Fs61.9±1.1En36.1±1.2Wo2.0±0.2; n=6; Fe/Mn=34.4±0.2); augite (Fs27.1±1.1En29.5±1.3Wo43.4±0.2; n=7; Fe/Mn=35.6±0.1); exsolved low-Ca pyroxene (Fs62.8±1.2En35.4±1.1Wo1.8±0.1; n=7; Fe/Mn=34.4±0.2); pigeonite exsolution lamellae in orthopyroxene (Fs55.3±1.3,En34.4±1.2Wo10.3±0.3; n=7; Fe/Mn = 33.2±0.1).

Classification: Basaltic eucrite with moderate degree of shock and medium degree of weathering.

Specimens: A total of 21.2 g specimen and one thin section is on deposit at MSN-FI. Mimaghador owns the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2015 Sept
Mass (g):110.3
Shock stage:moderate
Weathering grade:medium
Ferrosilite (mol%):61.9±1.1; 55.3±1.3); 27.1±1.1
Wollastonite (mol%):2.0±0.2; 10.3±0.3; 43.4±0.2
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, MSN-FI
Type spec mass (g):21.2
Type spec location:MSN-FI
Main mass:Mimaghador
Comments:Submitted by Vanni Moggi Cecchi
   and collections
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Hichame Mimaghador   


     This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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