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Northwest Africa 7977
Basic information Name: Northwest Africa 7977
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7977
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 3.4 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 545 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 12 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7977 (NWA 7977)

Morocco

Purchased: 2013

Classification: HED achondrite (Diogenite)

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to Sean Tutorow for classification, 2012.

Physical characteristics: Numerous matching fragments of the original mass, friable with coarse grained gemmy green pyroxenes, some light tan desert coating present.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 95% pyroxene, minor iron metal, chromite, troilite, and silica.

Geochemistry: (C. Agee and N. Muttik, UNM) Low Ca-pyroxene Fs28.4±0.3Wo3.5±0.7, Fe/Mn=29±1 n=14.

Classification: Achondrite (diogenite). Equilibrated, uniform pyroxene compositions.

Specimens: Two pieces, 33.75 g and 22.1 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):3403
Pieces:Many fragments
Class:Diogenite
Ferrosilite (mol%):28.4±0.3
Wollastonite (mol%):3.5±0.7
Classifier:C. Agee, UNM
Type spec mass (g):55.8
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G-382; 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)
Alpha Tauri   
Cosimo Damiano Gorgoglione   
Denis gourgues      
JGarciaMCM      
Mike Markowitz   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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