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Northwest Africa 13659 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13659 This is an OFFICIAL meteorite name. Abbreviation: NWA 13659 Observed fall: No Year found: 2017 Country: Morocco 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 13659 (NWA 13659) Morocco Find: 2017 Classification: HED achondrite (Eucrite) History: Purchased in 2017 at the Tucson Gem Show by Matthew Stream from a seller in Morocco. Physical characteristics: Single stone with weathered fusion crust. Petrography: (D. Sheikh, FSU) Specimen is composed of randomly oriented, acicular calcic plagioclase laths (80±30µm), low-Ca pyroxene, pigeonite, high-Ca pyroxene, chromite (some containing up to 3.2 wt% TiO2), and SiO2-rich glass. Geochemistry: Low-Ca Pyroxene (Fs60.1±5.1Wo3.1±0.9, range Fs51.8-67.9Wo2.1-4.4, FeO/MnO=28±2, n=7), Pigeonite (Fs47.8±9.7Wo13.0±5.7, range Fs34.2-73.6Wo6.4-22.3, FeO/MnO=27±3, n=30), High-Ca Pyroxene (Fs51.9±11.4Wo30.2±4.6, range Fs38.8-59.5Wo26.6-35.3, FeO/MnO=30±5, n=3), Calcic Plagioclase (An89.6±0.9, range An87.6-91.3, n=25). Classification: Achondrite (eucrite) Specimens: 20.2 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 1548 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater) |