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Northwest Africa 13668 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13668 This is an OFFICIAL meteorite name. Abbreviation: NWA 13668 Observed fall: No Year found: 2018 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||||
Classification history: |
This is 1 of 490 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||
Comments: | Approved 10 Jan 2021 | ||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13668 (NWA 13668) Algeria Find: 2018 Classification: HED achondrite (Eucrite) History: Purchased in 2020 by Matthew Stream from a seller in Algeria. Physical characteristics: Single stone with slightly weathered fusion crust. Petrography: (D. Sheikh, FSU) Specimen exhibits a primarily ophitic texture and is composed of calcic plagioclase (some partly maskelynized), low-Ca pyroxene, pigeonite, and high-ca pyroxene (400±50 µm), with accessory chromite (some containing up to 15.8 wt% TiO2), ilmenite, zircon, and SiO2-rich glass. Geochemistry: Low-Ca Pyroxene (Fs59.5±1.2Wo3.6±0.9, range Fs56.9-61.5Wo2.2-5.5, FeO/MnO=30±3, n=29), Pigeonite (Fs54.0±4.5Wo10.4±5.1, range Fs44.0-58.8Wo6.0-22.6, FeO/MnO=30±3, n=17), High-Ca Pyroxene (Fs30.3±4.5Wo38.0±5.4, range Fs26.2-40.9Wo26.4-43.1, FeO/MnO=28±3, n=10), Calcic Plagioclase (An89.3±1.7, range An83.7-92.2, n=36). Classification: Achondrite (Eucrite) Specimens: 21.2 g at UCLA; main mass with Matthew Stream. | ||||||||||||||||||||||||||
Data from: MB110 Table 0 Line 0: |
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Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:![]() |
Statistics: This is 1 of 1059 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters) |