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Northwest Africa 4679
Basic information Name: Northwest Africa 4679
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4679
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 735 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  CK4
Recommended:  CK4    [explanation]

This is 1 of 105 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 18 Nov 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 4679 (NWA 4679)

(Northwest Africa)

Purchased: 2006 May

Classification: Carbonaceous chondrite (CK4)

Petrography: (K. Metzler, IfP) Chondrules and CAIs (up to 6 mm) are embedded in a fine-grained brownish matrix. Mean apparent chondrule size 1.4±0.5 mm (0.2-2.9 mm; n=63). The sample is interspersed with magnetite nodules.

Geochemistry: Random olivine measurements revealedFa 32.2±0.6 (Fa31.3-33.0; n=14). One BO chondrule with igneous rim shows a relict unequilibrated core with Fa7.9. The compositional range of feldspar is An17.3-35.1 (n=4). Magnetite is the most abundant opaque phase and shows significant concentrations of elements other than Fe (n=3): MgO 1.9-2.0 wt%; Al2O3 3.4-4.0 wt%; TiO2 0.8-0.9 wt%; Cr2O3 2.9-3.6 wt%; NiO 0.3-0.5 wt%.

Classification: CK chondrite based on mineral chemistry. Petrologic type 4 based on the chemical variation of olivine and pyroxene.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2006 May
Mass (g):735
Pieces:1
Class:CK4
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):32.2±0.6 (31.3-33.0; n=14)
Ferrosilite (mol%):25.7±1.3 (23.8-28.9; n=13)
Wollastonite (mol%):1.1±0.4 (0.5-2.0; n=13)
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Carsten Giessler, Germany
Comments:Originally submitted by Ray Pickard; submitted by K. Metzler (IfP)
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Gipo Meteorites      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
aranemac   
Auricular   
Charley Kettel   
Gregor H.   
Jean-Michel Masson   
Mirko Graul      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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