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Northwest Africa 11980
Basic information Name: Northwest Africa 11980
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11980
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1370 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  L5
Recommended:  L5    [explanation]

This is 1 of 7220 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 2 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11980 (NWA 11980)

(Northwest Africa)

Purchased: 2017 March

Classification: Ordinary chondrite (L5)

History: Purchased from a local dealer in Quarzazate in 2017.

Physical characteristics: Two stones of 1210 and 160 g. Cut face is gray with some lighter gray chondrules, light brown inclusions, and fresh metal.

Petrography: (R. Bartoschewitz, Bart) Microscopic examination of a thin section shows recrystallized and shocked matrix: mosaicism and planar fractures in olivine, undulatory extinction in plagioclase and maskelynite. Chondrules moderatly developed (0.4-1.8 mm, average 0.9 mm).

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa22.1±0,6 (n=19); pyroxene Fs19.2±1.1Wo0.8±0.6 (n=9); Ca-pyroxene Fs21.4±3.2Wo9.6±2.4 (n=2). Kamacite Ni=5.9-6.7, Co=0.6 wt.% (n=5); taenite Ni=34.7-36.6, Co=0.3 wt.% (n=2). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.94.

Classification: Ordinary chondrite (type L5, S3, W1)

Specimens: 20.1 g on deposit at Kiel, main mass Dieter Janek.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2017 March
Mass (g):1370
Pieces:2
Class:L5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):22.1±0.6 (n=19)
Ferrosilite (mol%):19.2±1.1 (n=9)
Wollastonite (mol%):0.8±0.6
Magnetic suscept.:4.94
Classifier:Bart
Type spec mass (g):20.1
Type spec location:Kiel
Main mass:Dieter Janek, Eppan, Italy
Finder:anonymous
Comments:working name DJ2017/13; submitted by R. Bartoschewitz
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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