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Northwest Africa 5774
Basic information Name: Northwest Africa 5774
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5774
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 34 g
Meteoritical Bulletin:  MB 102  (2013)  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 10 Dec 2013
Writeup from MB 102:

Northwest Africa 5774 (NWA 5774)

(Northwest Africa)

Purchased: 2005 Jun

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by F. Kuntz in June 2005 from a dealer in Morocco.

Petrography: (A. Irving and S. Kuehner) Fresh fragmental breccia composed mainly of gabbroic eucrite clasts and related crystalline debris, plus ~5 vol.% orthopyroxene grains derived from diogenites. The eucrite material consists of exsolved pigeonite, calcic plagioclase,silica polymorph, subcalcic ferroaugite, fayalite, ferrosilite, symplectititc intergrowths of fayalite+hedenbergite+silcia, ilmenite, Ti-poor chromite, Ti-rich chromite and troilite.

Geochemistry: Olivine (Fa77.1, FeO/MnO = 44.6), diogenitic orthopyroxene (Fs26.1Wo3.9, FeO/MnO = 31), pigeonite (Fs36.6Wo6.0; Fs53.3Wo10.1; FeO/Mn) = 29-30), subcalcic ferroaugite (Fs64.4Wo28.7, FeO/MnO = 37), low-Ca pyroxene host (Fs54.8Wo8.4, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs31.0Wo39.0, FeO/MnO = 31).

Classification: Eucrite (polymict).

Specimens: Type specimen plus one polished thin section at PSF; main mass with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2005 Jun
Mass (g):34
Shock stage:low
Weathering grade:low
Fayalite (mol%):77.1
Ferrosilite (mol%):36.6-53.3
Wollastonite (mol%):6.0-10.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):7.5
Type spec location:PSF
Main mass:F. Kuntz
Comments:K117; submitted by P. Sipiera
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz: Fabien Kuntz, France; Website (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Grünemeyer Photo added 19 Apr 2022
Anthony James   
David Campbell Photo added 19 Apr 2022
John Lutzon   

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

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