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31.09g LL3.5 Type 3 Chondrite End Piece

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  • $ 650.00

On Offer: Beautiful chondrule packed specimen with a mass of 31.09 grams. This specimen is an end cut with a natural side and polished side.
Official name:  NWA 7981. 
Type: LL3.5
Year found: 2013
Country: Morocco
Description: 31.09 gram end piece of the LL3.5 Type 3 ordinary chondrite NWA 7981.  
NWA 7981 is a lovely chondrite displaying very tightly packed & well formed chondrules. As Type 3 primitive chondrite, the chondrules in this meteorite have undergone little to no chemical equilibration since its formation. This meteorite shows numerous unequilibrated porphyritic chondrules, most with glass or mesostasis.
What you get: NWA 7981  LL3.5 Chondrite Meteorite Specimen as shown, Membrane Storage/Display Box, & signed Certificate of Authenticity.
I offer a 100% no questions asked 30 day return policy.
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
Meteoritical Bulletin:   (2013)   LL3.5
Recommended:   LL3.5   

This is 1 of 22 approved meteorites classified as LL3.5.  
Comments: Approved 12 Sep 2013
Writeup from MB 102:

Northwest Africa 7981 (NWA 7981)


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:
  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
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States;  (institutional address; updated 12 Feb 2015)

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