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Northwest Africa 12236 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12236 This is an OFFICIAL meteorite name. Abbreviation: NWA 12236 Observed fall: No Year found: 2018 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 31 approved meteorites classified as H7. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 14 Nov 2018 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 12236 (NWA 12236) Morocco Purchased: 2018 Jan Classification: Ordinary chondrite (H7) History: Specimen is cataloged at the Royal Ontario Museum as LM58922. Petrography: Specimen is composed of olivine, pyroxene and minor plagioclase and is devoid of chondrules or relict chondrule rims. Texture is mainly poikilitic, with large olivine oikocrysts (averaging 2383 µm in diameter, n=12) enclosing small olivine phenocrysts (averaging 104 µm in diameter, n=26). Geochemistry: Olivine: 17.9±1.4, Fe/Mn=35.9±5.5 (n=27); Low Ca-pyroxene: Fs15.0±0.7Wo2.1±1.1, Fe/Mn=23.3±5.0 (n=24); Augite Fs6.6±1.0Wo42.0±3.6, Fe/Mn=15.9±1.5, Cr2O3=1.22±0.23 wt% (n=7). Oxygen Isotopes: (Karen Ziegler, UNM) δ17O = 2.937 permil, δ18O = 4.497 permil, δ17O = 0.562 permil | ||||||||||||||||||||||||||||||
Data from: MB107 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. 107, MAPS 55, 460-462
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Geography:![]() |
Statistics: This is 1 of 1992 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) |