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Northwest Africa 6964
Basic information Name: Northwest Africa 6964
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6964
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 93 g
Classification
  history:
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 228 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6964 (NWA 6964)

(Northwest Africa)

Purchased: 2011

Classification: HED achondrite (Eucrite, monomict)

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

Physical characteristics: 41 up to 2 cm sized individuals most of which partly to completely covered by fusion crust.

Petrography: Monomict basaltic breccia predominantly composed of up to 400 µm sized exsolved pyroxenes and often lath-shaped calcic plagioclase. Minor phases include FeS, chromite, ilmenite, and silica. No metallic iron was found. The meteorite contains impact melt veins.

Geochemistry: low-Ca pyroxene: Fs59.9±0.7Wo2.6±0.8 (Fs58.1-60.6Wo1.8-4.4, n=15, FeO/MnO=29-31); Ca-pyroxene: Fs26.5±0.4Wo43.7±0.6 (Fs25.7-27.5Wo42.1-44.5, n=30, FeO/MnO=26-34); calcic plagioclase: An90.1±0.6 (An89.1-91.6, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2011
Mass (g):93
Pieces:41
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):59.9; 26.5
Wollastonite (mol%):2.6; 43.7
Classifier:A. Greshake, MNB
Type spec mass (g):20.6
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; updated 24 Dec 2011)
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)
Gregor H.   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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