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Northwest Africa 7974
Basic information Name: Northwest Africa 7974
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7974
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 662 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2788 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 12 Aug 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7974 (NWA 7974)

Morocco

Purchased: 2013

Classification: Ordinary chondrite (LL6)

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, 2013.

Physical characteristics: Two matching stones, dark weathered exterior, saw cut reveals scattered large chondrules set in a fine grained orange-brown groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows indistinct, equilibrated chondrules, plagioclase up to 100 μm, augite, some oxidation of metal.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa31.7±0.4, Fe/Mn=64±3, n=14; low Ca-pyroxene Fs25.7±0.2Wo2.2±0.2, Fe/Mn=38±2, n=7.

Classification: Ordinary chondrite (LL6), weathering grade (W2).

Specimens: 22.6 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):662.2
Pieces:2
Class:LL6
Weathering grade:W2
Fayalite (mol%):31.7±0.4
Ferrosilite (mol%):25.7±0.2
Wollastonite (mol%):2.2±0.2
Classifier:C. Agee, UNM
Type spec mass (g):22.6
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G-419; 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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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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