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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 555 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)
Find references in NASA ADS:
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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 Photo added 19 Apr 2022
Andreas Grünemeyer Photo added 19 Apr 2022
bphd Photo added 19 Apr 2022
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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