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Northwest Africa 12397 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12397 This is an OFFICIAL meteorite name. Abbreviation: NWA 12397 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 263 approved meteorites classified as Mesosiderite. [show all] Search for other: Mesosiderites, Metal-rich meteorites | ||||||||||||||||||||||||||||
Comments: | Approved 27 Mar 2019 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12397 (NWA 12397) (Northwest Africa) Purchased: 2014 Classification: Mesosiderite Physical characteristics: 3 × 2 × 2.5 cm in size. A well rounded sample with red brown staining and visible surface weathering. Petrography: Composed mainly of Opx and Plg. Opx ranges from few μm to 2740 μm. Plg ranges from few μm to 160 μm. FeNi metal ranges from 50 μm to 1480 μm and sulfides from 10 μm to 1070 μm. Opaques comprise approximately 20% of sample. Weakly Shocked: plagioclase displays minor undulose extinction and no melt veins or melt pockets are visible. Moderately weathered: pervasive Fe Oxide veining, some oxidation of metal and sulfides. Geochemistry: Low Ca pyroxene: Fs 26.4±0.5Wo2.2±0.4 n=37; Feldspar: An91.7±1.6Ab8.0±1.5, n= 23. Oxygen isotopes (Ziegler, UNM): δ17O=1.992±0.07, δ18O=4.323±0.42, Δ17O=-0.291±0.02 per mil (n=2) Classification: Mesosiderite Specimens: Catalogued at the ROM as LM57788 | ||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||
Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 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) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |