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Northwest Africa 10782 | |||||||||||||||||||||||
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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: 39 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 108 approved meteorites classified as Lunar. [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||
Comments: | Approved 2 Nov 2016 | ||||||||||||||||||||||
Writeup |
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: MB105 Table 0 Line 0: |
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Institutions 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) |
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Catalogs: |
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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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Geography: |
Statistics: This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names) |