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Northwest Africa 10782
Basic information Name: Northwest Africa 10782
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10782
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 39 g
Meteoritical Bulletin:  MB 105  (2016)  Lunar (regolith breccia)
Recommended:  Lunar    [explanation]

This is 1 of 108 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 2 Nov 2016
Writeup from MB 105:

Northwest Africa 10782 (NWA 10782)

(Northwest Africa)

Purchased: 2015 May 01

Classification: Lunar (regolith breccia)

History: Found in the region of Almabas near the frontier between Morocco and Algeria.

Physical characteristics: One stone with no visible fusion crust. Recognized as a lunar breccia by L. Labenne.

Petrography: (R. Hewins, S. Pont, B. Zanda, MNHNP) This is a breccia composed mainly of crystal clasts a few hundred μm in size, with a few glassy to dendrite-bearing spherules about 1 mm in size. Matrix is very fine-grained, in some cases glass with schlieren, with vugs or vesicles. There are a few breccia clasts up to 4 mm, very fine grained (1-2 μm) and in some cases with igneous textures (i.e. clast-laden melt rock clasts). Breccia clasts contain feldspathic igneous clasts with intersertal textures resembling Apollo 14310 but finer, as well as crystal clasts and rare lithic chips. Some pyroxene clasts show exsolution. Accessory minerals include troilite, ilmenite, a silica phase and, in the largest melt-rock, Ni-bearing metal.

Geochemistry: Mineral compositions and Geochemistry: (R. Hewins ans S. Pont, MNHNP) The pyroxene compositions are Fs36.7Wo7.6 to Fs55.3Wo19.6, and the atomic Fe/Mn falls just below the UNM lunar line with average ratio 71. Both magnesian and ferroan olivine clasts are present, with FeO/MnO of 103 falling just below the lunar value. Spinel contains ~40 wt% Cr2O3. Plagioclase is An93.6Ab6.2Or0.2. The glassy matrix is basaltic (sensu lato).

Classification: (R. Hewins MNHN) Lunar breccia. The meteorite contains anorthite with olivine and pyroxene Fe/Mn ratios matching lunar. As it contains Ni-rich metal, glass spherules and breccia clasts it is classified as a regolith breccia.

Specimens: The main mass (31 g) is held by Labenne. The type specimen consists of 0.977 g and 6.88 g at MNHNP.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2015 May 01
Mass (g):39.0
Class:Lunar (regolith breccia)
Weathering grade:low
Classifier:R. Hewins, MNHNP
Type spec mass (g):7.857
Type spec location:MNHNP
Main mass:Labenne Meteorites
Comments:W: Temporary name LM 220515 W.; submitted by R. Hewins
   and collections
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
MNHN: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
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)
Franco Vignato   

     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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