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Northwest Africa 12323 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12323 This is an OFFICIAL meteorite name. Abbreviation: NWA 12323 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 447 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 318 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||
Comments: | Approved 14 Dec 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12323 (NWA 12323) (Northwest Africa) Purchased: 2018 Aug Classification: Martian meteorite (Shergottite) History: Purchased by Ben Hoefnagels in August 2018 from a dealer in Agadir, Morocco. Physical characteristics: Single stone (447 g) exhibiting a brown weathered exterior and a fresh interior with obvious glassy maskelynite. The specimen is crosscut by several thin, dark shock melt veinlets. Petrography: (A. Irving and S. Kuehner, UWS) Gabbroic assemblage of predominantly prismatic, zoned and twinned grains of clinopyroxene (up to 3.6 mm long) and maskelynite (some as thin, curved laths in sheaf-like groups) with accessory merrillite, ilmenite, ulvöspinel and pyrrhotite, plus minor secondary barite and calcite. Geochemistry: Orthopyroxene core (Fs22.1Wo3.1, FeO/MnO = 32), pigeonite (Fs29.9Wo7.3; Fs31.9-76.8Wo13.7-15.7; FeO/MnO = 31-46; N = 5), subcalcic augite (Fs28.9-39.3Wo31.7-27.1, FeO/MnO = 33-37, N = 2), maskelynite (An54.6-54.7Or0.6-0.5, N = 2). Classification: Martian (shergottite, gabbroic). Specimens: 22.1 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels. | ||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
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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 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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