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Northwest Africa 5474
Basic information Name: Northwest Africa 5474
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5474
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 58 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 379 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Sep 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 5474 (NWA 5474)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was bought in 2008 from a Moroccan meteorite dealer in Erfoud, Morocco.

Physical characteristics: Grayish individual lacking any fusion crust.

Petrography: The meteorite is a breccia composed of basaltic, dark impact melt, and mineral clasts set into a fine-grained clastic matrix. Clasts and matrix are dominantly composed of exsolved pyroxene and plagioclase up to 1 mm in size. Minor phases include chromite, fayalite, pyrrhotite, silica, and metallic iron.

Geochemistry: Low-Ca pyroxene: Fs26.8±1.6Wo3.4±0.7 (Fs21.5-28.7Wo2.0-4.2, n=15, FeO/MnO=29-36); Ca-pyroxene: Fs26.1±1.4Wo42.4±0.8 (Fs23.8-28.2Wo40.4-43.0, n=18, FeO/MnO=30-39); calcic plagioclase: An90.3±3.8 (An79.4-95.8, n=17)

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2008
Mass (g):58
Pieces:1
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):26.8; 26.1
Wollastonite (mol%):3.4; 42.4
Classifier:A. Greshake, MNB
Type spec mass (g):11.8
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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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)
André Knöfel Photo added 19 Apr 2022
Dirk Hohmann Photo added 19 Apr 2022
Photo added 19 Apr 2022
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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