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Northwest Africa 7983 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7983 This is an OFFICIAL meteorite name. Abbreviation: NWA 7983 Observed fall: No Year found: 2013 Country: Morocco Mass: ![]() | ||||||||||||||||||||||
Classification history: |
This is 1 of 617 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||
Comments: | Approved 12 Sep 2013 | ||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 7983 (NWA 7983) Morocco Purchased: 2013 Classification: Ureilite History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, 2012. Physical characteristics: Two matching stones with a dark brown exterior. Saw cut reveals brown-orange fine-grained texture. Extremely resistant to grinding and polishing. Petrography: (C. Agee) Dominated by olivine, crosscut and bounded by abundant iron veinlets and blebs, most of which is oxidized. Diamond ubiquitous, often forming elongate domains up to 500 μm. Troilite and Cr-rich sulfide present. Geochemistry: (C. Agee and N. Muttik) Olivine Fa12.0±3.5, Fe/Mn=24±6, Cr2O3=0.53±0.41 wt%, n=9, low-Ca pyroxene Fs13.1±1.9Wo2.7±0.2, Fe/Mn=25±4, Cr2O3=0.75±0.07 wt%, n=2, pigeonite Fs8.9±2.7Wo17.9±7.4, Fe/Mn=13±3, Cr2O3=0.88±0.03 wt%, n=2. Classification: Achondrite (ureilite). Diamond bearing. Specimens: 20 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. | ||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
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 Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater) |