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Northwest Africa 7867
Basic information Name: Northwest Africa 7867
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7867
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 3.39 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL7
Recommended:  LL7    [explanation]

This is 1 of 59 approved meteorites classified as LL7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 May 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7867 (NWA 7867)

Morocco

Purchased: 2012

Classification: Ordinary chondrite (LL7)

History: Purchased by Aziz Habibi in Morocco, 2012.

Physical characteristics: Single stone, weathered fusion crust, broken surface reveals scattered small clasts set in a fine-grained, friable, light-gray matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a brecciated, recrystallized chondrite, no chondrules present. Numerous equilibrated chondrite clasts from 500 μm to 2 mm set in a fine-grained cataclastic matrix. Three distinct LL lithologies identified based on texture and olivine Fa-content.

Geochemistry: (C. Agee and L. Burkemper, UNM) Lithology-1: Fa30.6±0.5, Fe/Mn=61±3, n=17; low-Ca pyroxene Fs25.1±0.3Wo2.2±0.6, Fe/Mn=37±1, n=13; lithology-2: Fa32.5±0.3, Fe/Mn=65±3, n=8; low-Ca pyroxene Fs26.6±0.5Wo2.1±0.4, Fe/Mn=40±2, n=6; lithology-3: Fa29.2±0.5, Fe/Mn=60±2, n=5; low-Ca pyroxene Fs23.7±0.1Wo1.9±1.5, Fe/Mn=35±1, n=3.

Classification: Ordinary chondrite (LL7), breccia, chondrules absent, weathering grade W1.

Specimens: 33 g including a probe mount on deposit at UNM, Aziz Habibi holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012
Mass (g):3386
Pieces:1
Class:LL7
Weathering grade:W1
Fayalite (mol%):30.6±0.5, 32.5±0.3, 29.2±0.5
Ferrosilite (mol%):25.1±0.3, 26.6±0.5, 23.7±0.1
Wollastonite (mol%):2.2±0.6, 2.1±0.4, 1.9±1.5
Classifier:C. Agee, UNM
Type spec mass (g):33
Type spec location:UNM
Main mass:Aziz Habibi
Comments: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:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dominik Stoeckli   
Wang Ziyao      
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1370 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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