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Northwest Africa 7981
Basic information Name: Northwest Africa 7981
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7981
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 110.9 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL3.5
Recommended:  LL3.5    [explanation]

This is 1 of 21 approved meteorites classified as LL3.5.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 12 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7981 (NWA 7981)

Morocco

Purchased: 2013

Classification: Ordinary chondrite (LL3.5)

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

Physical characteristics: Single stone, dark weathered fusion crust, saw cut reveals many chondrules of variable size, some up to 5 mm, set in a reddish brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated porphyritic chondrules, most with glass or mesostasis.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa26.8±8.5, Fe/Mn=73±21, Cr2O3=0.08±0.19 wt%, range Cr2O3=0.01-0.96 wt%, CaO=0.08±0.06 wt%, n=29; low-Ca pyroxene Fs20.0±7.5Wo2.7±2.8, Fe/Mn=31±18, n=17.

Classification: Ordinary chondrite (LL3.5). Weathering grade W2.

Specimens: 20.9 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):110.9
Pieces:1
Class:LL3.5
Weathering grade:W2
Fayalite (mol%):26.8±8.5
Ferrosilite (mol%):20.0.±7.5
Wollastonite (mol%):2.7±2.8
Classifier:C. Agee, UNM
Type spec mass (g):20.9
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G-416; 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 1466 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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