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Northwest Africa 6973
Basic information Name: Northwest Africa 6973
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6973
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 89 g
Classification
  history:
Recommended:  CK5    [explanation]

This is 1 of 158 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 10 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6973 (NWA 6973)

(Northwest Africa)

Purchased: 2011

Classification: Carbonaceous chondrite (CK5)

History: The meteorite was purchased in 2011 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Dark greyish individual almost completely covered with fusion crust.

Petrography: The meteorite displays a dark-greenish interior and is composed of several clearly defined chondrules and rare CAIs set into abundant recrystallized matrix. Ferroan olivine is the most abundant mineral phase; more minor phases include feldspar, low-Ca pyroxene, Ca-pyroxene and Cr-bearing magnetite. Metal was not observed.

Geochemistry: olivine: Fa31.1±0.2, n=12, FeO/MnO=101±9; low-Ca pyroxene: Fs26.3±0.2Wo0.8±0.1, n=12; Ca-pyroxene: Fs9.2±0.1Wo46.4±0.2, n=4

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2011
Mass (g):89
Pieces:1
Class:CK5
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):31.1
Ferrosilite (mol%):26.3; 9.2
Wollastonite (mol%):0.8; 46.4
Classifier:A. Greshake, MNB
Type spec mass (g):18
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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)
bphd   
Mirko Graul      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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