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Northwest Africa 11898 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11898 This is an OFFICIAL meteorite name. Abbreviation: NWA 11898 Observed fall: No Year found: 2018 Country: Mali Mass: 768 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 31 Aug 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11898 (NWA 11898) Mali Purchased: 2018 Classification: Lunar meteorite (feldspathic breccia) History: Purchased in March 2018 by Dustin Dickens from a meteorite dealer in Mali. Physical characteristics: Several identical appearing dark stones covered partially with a milky-green fusion crust. Broken surface reveals a fragmental breccia with numerous white feldspathic clasts set in a dark colored ground mass. Petrography: (C. Agee, UNM) This meteorite is a breccia of primarily feldspathic clasts, with lesser amounts of olivine and pyroxene fragments. The shock melt composition has a very high alumina content, vesicles occur throughout. Geochemistry: (C. Agee, UNM) olivine Fa25.0±6.4, Fe/Mn=90±5, n=8; pigeonite Fs31.0±3.6Wo8.1±3.6, Fe/Mn=58±4, n=6; high-Ca pyroxene Fs22.3±3.7Wo35.0±4.7, Fe/Mn=52±5, n=4; plagioclase An96.3±0.7Ab3.5±0.7Or0.2±0.0, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.1±0.6, TiO2=0.12±0.03, Al2O3=31.3±1.2, Cr2O3=0.03±0.01, MgO=2.0±0.5, FeO=2.5±0.5, MnO=0.03±0.01, CaO=18.0±0.4, Na2O=0.36±0.01, K2O=0.04±0.00 (all wt%), n=4. Classification: Lunar feldspathic breccia Specimens: 21.6 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 117 approved meteorites from Mali (plus 2 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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