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Northwest Africa 4925
Basic information Name: Northwest Africa 4925
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4925
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 282 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 176 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 8 Sep 2008
Writeuphelp
Writeup from MB 94:

Northwest Africa 4925

Erfoud, Morocco

Find: 2007

Achondrite (Martian, olivine-phyric shergottite)

History: The meteorite was found by an anonymous person in northwest Africa and bought by the main mass holder in Erfoud, Morocco.

Physical characteristics: One fragment partly covered by fusion crust weighing 282.3 g was found.

Petrography: (A. Greshake, MNB) The meteorite displays a porphyritic texture with large chemically zoned olivine megacrysts set into a fine-grained groundmass composed of pyroxene and maskelynite. Minor phases include chromite, sulfides, phosphates, and small Fe-rich olivines. The olivine megacrysts often contain melt inclusions and small chromites.

Geochemistry: Mineral composition (EMPA): Olivine, Fa27.6–46.8; pyroxene, Fs20.0–37.7Wo3–14.8; maskelynite, An67–69.

Classification: Achondrite (Martian, olivine-phyric shergottite); severely shocked with some melt pockets; moderately weathered.

Specimens: A total of 20.1 g plus one polished thin section are on deposit at MNB. Ralew holds the main mass.

Data from:
  MB94
  Table 2
  Line 85:
State/Prov/County:Erfoud
Date:2007
Mass (g):282.3
Pieces:1
Class:Shergottite
Fayalite (mol%):27.6-46.8
Ferrosilite (mol%):20.0-37.7
Wollastonite (mol%):3-14.8
Classifier:A. Greshake, MNB
Type spec mass (g):20.1
Type spec location:MNB
Main mass:Ralew
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Alessandro Takeda   
André Knöfel   
Auricular   
bphd   
Charley Kettel   
Dirk Hohmann   
eraserhead   
Gerald Armstrong   
Luis Alexandre Franco Gonçales   
MeteoriteCollector.org - FCOM - Russ Finney         
METEORITES AUSTRALIA   
Michael Hofmann      
Paulo Silvio Rubiano   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6528 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)

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