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Northwest Africa 13983 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13983 This is an OFFICIAL meteorite name. Abbreviation: NWA 13983 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 1500 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 60 approved meteorites classified as Diogenite-pm. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 18 Jun 2021 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 110:
Northwest Africa 13983 (NWA 13983) (Northwest Africa) Purchased: 2020 Feb Classification: HED achondrite (Diogenite, polymict) History: Purchased by Ziyao Wang in February 2020 from a dealer in Algiers, Algeria. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed predominantly of angular grains of compositionally-zoned diogenitic orthopyroxene plus minor anorthitic plagioclase, eucritic exsolved pigeonite and rare silica polymorph, together with sparse lithic clasts of diogenite (some plagioclase bearing) and fine-grained ophitic eucrite, set in a matrix containing kamacite, taenite, troilite, low-Ti chromite and ilmenite. Some orthopyroxene contains sparse thin exsolution lamellae of augite. The proportion of eucritic material is estimated to be only 1-2 vol.%. Geochemistry: Diogenitic orthopyroxene (cores Fs21.3-25.1Wo1.9-4.1, FeO/MnO = 28-32, N = 4; rims Fs36.1-39.6Wo1.9-3.2, FeO/MnO = 31-32, N = 3), augite (Fs16.0±0.0Wo44.1-44.2, FeO/MnO = 23-27, N = 2), eucritic low-Ca pyroxene host (Fs53.9-55.7Wo1.6-4.5, FeO/MnO = 28-29, N = 2), augite exsolution lamella (Fs23.6Wo42.6, FeO/MnO 25), plagioclase (An87.5-93.4Or0.5-0.3, N = 3). Classification: Diogenite (polymict breccia). Specimens: 25.0 g including one polished thin section at UWB; remainder with WangZ. | ||||||||||||||||||||||||||||
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) WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 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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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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