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Northwest Africa 13789 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13789 This is an OFFICIAL meteorite name. Abbreviation: NWA 13789 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 517 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 28 Mar 2021 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13789 (NWA 13789) (Northwest Africa) Purchased: 2020 Classification: HED achondrite (Diogenite) History: The meteorite was purchased from a dealer in Morocco. Physical characteristics: Almost completely crusted fragment showing a grayish to orange interior. Petrography: The meteorite is a monomict breccia predominantly composed of blocky up to 6 mm sized orthopyroxene grains and more fine-grained cataclastic regions. Minor phases include chromite, troilite, and unusually abundant metallic iron. No plagioclase has been found in the two sections studied. The meteorite is highly shocked and contains abundant shock melt veins and pockets. Geochemistry: low-Ca pyroxene: Fs26.8±0.7Wo2.2±0.1 (Fs26.2-27.0Wo2.1-2.3, n=7, FeO/MnO=24-28; oxygen isotopes (K. Ziegler, UNM): 3 acid-washed fragments analyzed by laser fluorination gave: δ18O=3.306, 3.778, 3.046; δ17O=1.488, 1.713, 1.341; Δ17O= -0.257, -0.282, -0.267 (all per mil) Classification: Diogenite | ||||||||||||||||||||||||||||
Data from: MB110 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||
Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) 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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Geography: |
Statistics: This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |