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Northwest Africa 4040
Basic information Name: Northwest Africa 4040
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4040
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 226 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  L3
Recommended:  L3    [explanation]

This is 1 of 709 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 3 Feb 2006
Writeuphelp
Writeup from MB 90:

Northwest Africa 4040

Find: 2004

Ordinary chondrite (L3)

History: A complete stone weighing 226.3 g was found by an anonymous finder in the western Sahara in Morocco.

Petrography: (A. Greshake, MNB) The sample is a brecciated ordinary chondrite with centimeter-size dark and light inclusions. The dark inclusion is composed of small anhedral, mostly skeletal olivine displaying compositional zoning from an Mg-rich core to a more Fe-rich rim embedded into a mostly glassy groundmass containing small dendrites of olivine and pyroxene, with sulfide spherules also present. A light inclusion is a brecciated intergrowth of compositionally zoned olivine and low-Ca pyroxene. Si, Al-rich glass occurs in the interstitial areas of the rock and commonly contains sulfide spherules. The sample contains abundant chondrules with a chondrule/matrix ratio typical of L chondrites. The mean chondrule size is ~0.7 mm. The petrologic type is probably very low.

Composition: Olivine (Fa0.4–29.5), pyroxene (Fs2.8–23.9).

Classification: Ordinary chondrite (L3); S2, W2.

Specimens: One 24.5 g type specimen and one polished thin section are on deposit at MNB. Stefan Ralew of Germany holds the main mass.

Data from:
  MB90
  Table 2
  Line 259:
Place of purchase:Morocco
Date:2004
Mass (g):226.3
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):0.4-29.5
Ferrosilite (mol%):2.8-23.9
Type spec mass (g):24.5
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. 90, MAPS 41, 1383-1418 (2006)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Meteorites Australia   
Polandmet      
Geography: 
Coordinates:Unknown.

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

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