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Northwest Africa 7420
Basic information Name: Northwest Africa 7420
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7420
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 99.8 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  CK5
Recommended:  CK5    [explanation]

This is 1 of 162 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 29 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7420 (NWA 7420)

(Northwest Africa)

Purchased: 2012 Feb

Classification: Carbonaceous chondrite (CK5)

History: Purchased in Agadir in Feb. 2012

Physical characteristics: Single stone, fusion crust partly covered by caliche, sawn face shows some chondrules and black inclusions set in a dark gray matrix.

Petrography: Microprobe examination of a thin section shows primarily fine-grained texture with olivine, pyroxene, magnetite, iron oxidation from weathering, and a few poorly developed chondrules up to 1 mm.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine: Fa29.6-30.4, mean Fa30.0±0.3; Fe/Mn=110±26 (n=17); Ca-rich pyroxene: Fs1.4-9.3En0-42Wo48-99 (n=8); magnetite: Cr2O3=3-4; Al2O3=0.3-3.7 wt.% (n=10).

Classification: Carbonaceous chondrite (CK5)

Specimens: 20.6 g on deposit at Kiel, main mass A. Koppelt (München) and 9 g with Bart.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2012 Feb
Mass (g):99.8
Pieces:1
Class:CK5
Shock stage:S4
Fayalite (mol%):30.0 (29.6-30.4, n=17)
Magnetic suscept.:4,87
Classifier:Bart
Type spec mass (g):20.58
Type spec location:Kiel
Main mass:A. Koppelt
Finder:anonymous
Comments: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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ironee   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7374 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

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