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Northwest Africa 13964 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13964 This is an OFFICIAL meteorite name. Abbreviation: NWA 13964 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 6.5 kg | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 334 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 21 Jun 2021 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13964 (NWA 13964) (Northwest Africa) Purchased: 2021 Mar Classification: Lunar meteorite (feldspathic breccia) History: Purchased by Craig Zlimen and Mark Lyon in March 2021 from an Algerian dealer. The main mass plus an additional piece were subsequently acquired by Alan Ginsberg. Physical characteristics: Two similar-appearing pieces (4630 g, 1900 g) lacking fusion crust, which are naturally broken portions of a single meteorite stone. The material is composed of relatively large beige and light gray, angular clasts in a medium gray matrix. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Anorthositic breccia composed of >95 vol.% anorthitic plagioclase as both polymineralic lithic clasts (anorthosite, plagioclase-rich basalt) and mineral grains within a fine grained matrix. The most common mafic phase is olivine, but orthopyroxene, augite and pigeonite are also present, along with accessory Ti-chromite, troilite, rare armalcolite and minor secondary barite. Geochemistry: Olivine (Fa23.2-33.3, FeO/MnO = 88-102, N = 4), low-Ca pyroxene (Fs28.6-35.8Wo2.0-3.5, FeO/MnO = 51-59, N = 3), pigeonite (Fs24.4-29.4Wo9.2-9.5, FeO/MnO = 44-48, N =2), augite (Fs11.9-20.1Wo38.9-43.8, FeO/MnO = 45-56, N = 2), anorthite (An95.9-96.8Or0.1±0.0, N = 3), armalcolite (Mg0.4Fe0.46Cr0.06Al0.07Ti1.97O5). Classification: Lunar (anorthositic breccia). Specimens: 26.1 g including one polished thin section at UWB; 4630 g stone plus a 441 g piece from the 1900 g stone with Mr. A. Ginsberg; remainder held jointly by Mr. C. Zlimen and Mr. M. Lyon. | ||||||||||||||||||||||||||||||
Data from: MB110 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
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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 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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