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Northwest Africa 4725
Basic information Name: Northwest Africa 4725
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4725
Observed fall: No
Year found: 2006
Country: Morocco
Mass:help 19 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  H/L3
Recommended:  H/L3    [explanation]

This is 1 of 9 approved meteorites classified as H/L3.   [show all]
Search for other: H chondrites, H chondrites (type 3), H/L chondrites, H/L chondrites (type 3), L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 17 Apr 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 4725

Morocco

Find: March 2006

Ordinary chondrite (H/L3)

History: C. Giessler purchased the stone in Agadir, Morocco, in March 2006.

Physical characteristics: The stone has a mass of 19 g.

Petrography: The meteorite is rich in small chondrules with abundant metal. BSE images indicate that it is an unequilibrated chondrite. Only the largest olivines in type I porphyritic chondrules are zoned, equilibrated low-Ca pyroxenes are enriched in FeO at the edges of these chondrules and along their cleavages. Metal and sulfide are associated in large nodules between chondrules and make up droplets in small melt pockets scattered through the whole sample. Sulfide fills cracks in silicates within chondrules. Large kamacite grains are always polycrystalline.

Geochemistry: Olivine, Fa = 16.3 ± 9.1, range 5.8-36.3; low-Ca pyroxene, Fs = 5.17 ± 3.09, range 2.5-16.2.

Classification: Ordinary chondrite (H/L3; estimated subtype 3.6); S4, W2.

Type specimens: A total of 3.9 g of sample (1 sawn fragment) and one polished mount is on deposit at MNHN. Giessler holds the main mass.

Data from:
  MB93
  Table 2
  Line 103:
Date:Mar-2006
Class:H/L3.6
Institutions
   and collections
MNHN: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Gi-po Meteorites   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann   
Gerald Armstrong   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1346 approved meteorites from Morocco (plus 14 unapproved names) (plus 1 impact crater)

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