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Northwest Africa 12920
Basic information Name: Northwest Africa 12920
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12920
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 10 kg
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  L6
Recommended:  L6    [explanation]

This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 6 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12920 (NWA 12920)

(Northwest Africa)

Purchased: 2018

Classification: Ordinary chondrite (L6)

History: Thierry Simard purchased a 10 kg stone in November of 2018 from a meteorite dealer in Rissani, Morocco.

Physical characteristics: The sample is coated in a dark-brown fusion crust that contains broad shallow regmaglypts, contraction cracks, and some weak flow lines. The cut face shows a mottled orangish-brown interior with a single, large, sulfide-rimmed chondrule set within a recrystallized matrix of silicates, metal, and sulfide.

Petrography: Description and classification (A. Love, App) Sample is a recrystallized chondrite containing a 9 mm diameter olivine macro-chondrule and several other indistinct chondrules. Additional minerals are troilite, chromite merrillite, kamacite and taenite.

Geochemistry: (A. Love, App): Olivine (Fa24.1±0.2, Fe/Mn=44.1±0.7, n=10); low Ca pyroxene (Fs 21.0±0.1Wo1.8±0.1, Fe/Mn=27.2±0.4, n=10).

Classification: Ordinary chondrite (L6, C-S3, W1). L chondrite based on olivine and pyroxene compositions and magnetic susceptibility. Type 6 based on texture and equilibrated compositions of silicates.

Specimens: Thierry Simard holds the main mass. A slice and fragments weighing 27.34 g, a polished thin section and mount are on deposit at App.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P 2018
Mass (g):10000
Pieces:1
Class:L6
Shock stage:C-S3
Weathering grade:W1
Fayalite (mol%):24.1±0.2
Ferrosilite (mol%):21.0±0.1
Wollastonite (mol%):1.8±0.1
Magnetic suscept.:4.83
Classifier:A. Love, App
Type spec mass (g):27.34
Type spec location:App
Main mass:Thierry Simard
Finder:Unknown
Comments:Submitted by Anthony Love
Institutions
   and collections		 App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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