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Northwest Africa 13765 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13765 This is an OFFICIAL meteorite name. Abbreviation: NWA 13765 Observed fall: No Year found: 2014 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 272 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||||
Comments: |
Approved 13 Mar 2021 Revised 4 Apr 2021: Aligning classification with text | ||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13765 (NWA 13765) Boujdour, Morocco Find: 2014 Classification: HED achondrite (Eucrite) History: Purchased by Douglas Chenin from a Moroccan meteorite dealer in 2014. Reportedly found the same year at Jrifia near Boujdour, Morocco. Physical characteristics: This meteorite is a single stone covered in black shiny fusion crust. Numerous fine cracks are present on the surface, small chipped spots reveal light tan colored interior. A freshly cut window shows a fine-grained texture with white feldspar grains and light gray pyroxene grains. Petrography: (C. Agee, UNM) Electron microprobe analysis of a polished mount shows a mildly brecciated rock having clasts with variable grain size. The finest grained clasts have plagioclase and pyroxene in size range 50-200 μm. Coarser grained clasts show elongate plagioclase up to 500 μm and equant pyroxene 100-400 μm. Very fine exsolution lamellae are present in both low-Ca pyroxene and augite. Chromite, Fe-metal, silica, and ilmenite are ubiquitous accessory minerals. Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs61.5±2.2Wo3.0±1.2, Fe/Mn=31±2, n=10; augite Fs27.3±0.5Wo43.5±0.6, Fe/Mn=31±2, n=10; plagioclase An88.9±0.8Ab10.5±0.7Or0.6±0.3, n=6. Compositionally uniform throughout with some grain size variation from clast to clast. Pyroxenes show nearly complete chemical compositional separation between low-Ca pyroxene and augite. Classification: Monomict eucrite. Specimens: 16.5 g on deposit at UNM, D. Chenin 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) |
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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 the only approved meteorite from Boujdour, Morocco This is 1 of 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater) |