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Northwest Africa 4039
Basic information Name: Northwest Africa 4039
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4039
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 950 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Eucrite-mmict
Recommended:  Eucrite    [explanation]

This is 1 of 472 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Feb 2006
Writeuphelp
Writeup from MB 90:

Northwest Africa 4039

Northwest Africa

Find: 2005

Achondrite (eucrite, monomict breccia)

History: Several stones totaling 950 g were found in 2005 by an anonymous finder in 2004 in the western part of the Sahara in Morocco.

Petrography: (A. Greshake, MNB) An unusual eucrite with dominantly coarse-grained basaltic texture of exsolved Ca pyroxene and plagioclase cross-cut by centimeter-size granular bands or crushed zones. Locally these zones display an equigranular texture with 120° grain boundaries; minor phases include orthopyroxene, silica, ilmenite, troilite, and Al-Ti chromite.

Geochemistry: Plagioclase (An90.1, range An88.3–92.6), orthopyroxene (Fs58.1–62.2Wo2.7–4.6), pigeonite (Fs50.7–58.6Wo5.2–15.7), augite (Fs26.3–34.9Wo32.1–44.1).

Classification: Achondrite (eucrite, monomict breccia); high shock, moderate weathering.

Specimens: A 20.1 g type specimen and one polished thin section are on deposit at MNB. An anonymous finder holds the main mass.

Data from:
  MB90
  Table 2
  Line 258:
Place of purchase:Morocco
Date:2005
Mass (g):950
Pieces:many
Class:Euc
Shock stage:High
Weathering grade:moderate
Type spec mass (g):20.1
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Peter Marmet   
Polandmet      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
André Knöfel   
Andreas Grünemeyer   
bphd   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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