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Northwest Africa 11789 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11789 This is an OFFICIAL meteorite name. Abbreviation: NWA 11789 Observed fall: No Year found: 2017 Country: Mauritania Mass: 5.49 kg | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 26 May 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11789 (NWA 11789) Mauritania Purchased: 2017 Classification: Lunar meteorite (feldspathic breccia) History: Purchased in Mauritania by Dustin Dickens from anonymous meteorite hunter. Physical characteristics: Seven black visually identical appearing pieces that fit back together to form a single mass with the largest piece weighing over 2 kg and the smallest under 45 g. The larger pieces show a black-brown fusion crust and thumb printing. Saw cut reveals a fragmented breccia with white feldspathic clasts set in a black ground mass. Petrography: (C. Agee, UNM) This meteorite is a polymict breccia of fragmental feldspathic and mafic lithologies, as well as fragmental pyroxene, olivine, plagioclase grains, and shock melt. Geochemistry: (C. Agee, UNM) Olivine Fa: 31.7±6.3, Fe/Mn=92±9, n=10; clinopyroxene Fs32.2±10.8Wo12.9±8.2, Fe/Mn=54±8, n=12; plagioclase An96.7±0.8, n=7; Shock melt (20 µm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.6±0.8, TiO2=0.19±0.13, Al2O3=27.6±5.0, Cr2O3=0.12±0.08, MgO=6.7±4.4, FeO=4.3±2.9, MnO=0.06±0.04, CaO=15.7±2.3, Na2O=0.34±0.13, K2O=0.09±0.05 (all wt%), n=6. Classification: Lunar feldspathic breccia Specimens: 43.15 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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