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Northwest Africa 480
Basic information Name: Northwest Africa 480
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 480
Observed fall: No
Year found: 2000
Country: (Northwest Africa)
Mass:help 28 g
NHM Catalogue:  5th Edition  (2000)  Martian (shergottite)
Meteoritical Bulletin:  MB 85  (2001)  Martian (basaltic shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 189 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Writeup from MB 85:

Northwest Africa 480

Northwest Africa

Found 2000 November

Martian meteorite (basaltic shergottite)

A 28 g stone almost completely covered with fusion crust was found in Morocco. Classification and mineralogy (J-A. Barrat, UAng; A. Jambon, UPVI; Violaine Sautter, MNHNP; Ph. Gillet, ENSL): has a coarse-grained basaltic texture consisting predominantely of subhedral to euhedral pyroxene (up to 3 mm) and interstitial, lath-shaped maskelynite; accessory minerals include merrilite, chlorapatite, pyrrhotite, Fe-oxides, fayalite and silica; pyroxenes show complex zonation with Mg-rich pigeonite cores (Fs26Wo4), followed by augite (Fs29Wo30), and mantled by Fe-rich pigeonite (Fs84Wo11); no pyroxferroite has been detected; maskelynites are homogeneous, An46–50Ab52–48Or~2; merrilite forms rounded grains (up to 100 µm) and is Fe-rich (~5 wt% FeO), commonly with 6–40 µm thick rims of fayalite (Fa~95), silica, Fe-Ti oxides, and pyrrhotite; silica (stishovite) occurs as irregular grains in maskelynite or at grain boundaries to pyroxene and is surrounded by radiating cracks. Oxygen isotopes (M. Javoy and E. Petit, IPGP): δ17O = +2.91·, δ18O = +4.78·, and 17O = +0.42·. Specimens: main mass, 25 g, CNES.

Data from:
  Table 4
  Line 130:
Mass (g):28
Plots: O isotopes:  
   and collections
ENSL: Ecole Normale Supérieure de Lyon, Laboratoire de Sciences de la Terre, 46 allée d'Italie 69364 Lyon Cedex, France (institutional address; updated 27 Feb 2011)
MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
CNES: Centre National d'Etudes Spatiales, 2 place Maurice Quentin, 75001 Paris, France (institutional address)
IPGP: Institute de Physique du Globe de Paris, 1 rue Jussieu, 75252 Paris, Cedex 05, France (institutional address; updated 3 Nov 2014)
UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address)
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
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Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
MeteoriteCollector.org - FCOM - Russ Finney   

     This is 1 of 6759 approved meteorites from (Northwest Africa) (plus 2047 unapproved names)

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