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Northwest Africa 13696 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13696 This is an OFFICIAL meteorite name. Abbreviation: NWA 13696 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 81 approved meteorites (plus 1 unapproved name) classified as Winonaite. [show all] Search for other: Primitive achondrites, Winonaites | ||||||||||||||||||||||||||||||||
Comments: | Approved 21 Feb 2021 | ||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13696 (NWA 13696) (Northwest Africa) Purchased: 2020 Classification: Primitive achondrite (Winonaite) History: The meteorite was purchased from a dealer in Algeria. Physical characteristics: Two brownish fragments partly covered with fusion crust exposing abundant metal grains at the surface. Petrography: The meteorite shows a recrystallized metamorphic texture with abundant 120 degree triple junctions. It is predominantly composed of 50 to 300 µm sized low-Ca pyroxene, Mg-rich olivine, diopside, and sodic feldspar grains. Low-Ca pyroxene is the most abundant mineral phase and often poikilitically encloses rounded to subrounded feldspar grains. No chondrules were observed. Kamacite, taenite, and troilite are finely dispersed throughout the meteorite. Contains minor chromite and chlorapatite. Some grain boundaries are decorated with secondary Fe-oxides. Geochemistry: olivine: Fa4.1±0.1 (Fa4.0-4.3, FeO/MnO=17±1, n=5); low-Ca pyroxene: Fs4.8±0.1Wo1.9±0.1 (Fs4.7-4.9Wo1.8-2.0, FeO/MnO=11±1, n=5); diopside: Fs1.8±0.1Wo45.5±0.3 (Fs1.7-2.0Wo45.1-45.9, FeO/MnO=9±2, n=5); feldspar: An21.9±0.3Ab75.3±0.5Or2.9±0.2, n=5 Classification: Winonaite; likely paired with NWA 13624 | ||||||||||||||||||||||||||||||||
Data from: MB110 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |