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Northwest Africa 13916 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13916 This is an OFFICIAL meteorite name. Abbreviation: NWA 13916 Observed fall: No Year found: 2021 Country: Algeria Mass: 175.4 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 30 approved meteorites classified as Lunar (frag. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 6 May 2021 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13916 (NWA 13916) Algeria Purchased: 2021 Classification: Lunar meteorite (frag. breccia) History: Purchased by Douglas Chenin from a Mauritanian meteorite dealer in 2021. Physical characteristics: This meteorite is a single stone with a shiny desert-weathered, sandblasted surface that displays some light-colored clasts set in a very dark groundmass. Petrography: (C. Agee, UNM) Electron microprobe analysis of a polished mount shows this meteorite to be a lunar polymict breccia with at least 9 distinct lithologies set in a fine-grained cataclastic groundmass of plagioclase, pyroxene and olivine fragments. Ubiquitous silica, merrillite, Fe-sulfide, Fe-metal (low Ni), and ilmenite were detected. Geochemistry: (C. Agee, UNM) Groundmass olivine Fa35.0±7.6, Fe/Mn=97±9, n=12; clinopyroxene Fs29.7±9.6Wo16.2±15.2, Fe/Mn=55±4, n=13; plagioclase An97.2±1.3, n=5. Clast-1 (microgabbro) clinopyroxene Fs30.3±11.6Wo30.5±16.9, Fe/Mn=65±8, n=3; plagioclase An95.0±0.3, n=2. Clast-2 (ferroan anorthosite) olivine Fa44.5, Fe/Mn=96, n=1; clinopyroxene Fs23.3Wo29.8, Fe/Mn=51, n=1; plagioclase An97.0, n=1. Clast-3 (impact quench-crystal melt) olivine Fa44.0, Fe/Mn=125, n=1; clinopyroxene Fs34.1±4.2Wo11.3±4.2, Fe/Mn=53±5, n=2; plagioclase An96.8, n=1. Clast-4 (anorthositic gabbro) clinopyroxene Fs26.1Wo27.9, Fe/Mn=55, n=1; plagioclase An97.5, n=1. Clast-5 (troctolite) olivine Fa35.8±8.1, Fe/Mn=96±4, n=2; plagioclase An97.6±2.8, n=2. Clast-6 (anorthositic troctolite) olivine Fa17.9, Fe/Mn=76, n=1; plagioclase An96.2, n=1. Clast-7 (microgabbro) clinopyroxene Fs24.4Wo23.9, Fe/Mn=58, n=1; plagioclase An97.8, n=1. Clast-8 (olivine microgabbro) olivine Fa40.8, Fe/Mn=111, n=1; clinopyroxene Fs28.2Wo18.3, Fe/Mn=64, n=1; plagioclase An96.0, n=1. Clast-9 (lunar granite) alkali feldspar Or76.3±1.4Ab22.0±1.3An1.7±0.0, n=2; silica polymorph (2.5wt% Al2O3). Classification: Polymict fragmental lunar breccia. Specimens: 21.2 g on deposit at UNM, DChenin holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB110 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) DChenin: The Dr. Douglas Chenin Collection, United States; Website (institutional address; updated 15 Mar 2021) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos: |
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Geography: |
Statistics: This is 1 of 1336 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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