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Northwest Africa 7983
Basic information Name: Northwest Africa 7983
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7983
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 424 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 12 Sep 2013
Writeuphelp
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:
Place of purchase:Morocco
Date:P 2013
Mass (g):424.3
Pieces:2
Class:Ureilite
Weathering grade:medium
Classifier:C. Agee, UNM
Type spec mass (g):20
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G-420; submitted by C. Agee
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John Tanner   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1409 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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