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Northwest Africa 2373
Basic information Name: Northwest Africa 2373
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2373
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 18 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Martian (olivine-phyric shergottite)
MetBase:  v. 7.1  (2006)  Shergottite-basaltic (ol phyric)
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
Writeuphelp
Writeup from MB 89:

Northwest Africa 2373

Northwest Africa

Purchased 2004 August

Martian (olivine-phyric shergottite)

Several small stones that weigh 18.1 g were purchased in Erfoud Morocco. They are yellow brown with desert ablation/varnish surface only, no fusion crust. Description and classification (T. Bunch and J. Wittke, NAU): olivine phenocrysts (<1.25 mm in longest dimension) set in a fine-grained groundmass (<0.1 mm) of pigeonite, maskelynite, chromite, Ti-magnetite, augite, chlorapatite and sulfide.  Olivine has cores of Fa30.7 (FeO/MnO = 51.9), rims of Fa50.3 (FeO/MnO = 53.3) and contain micron to submicron inclusions of chromite, glass, and barite. One large olivine grain, which may be a xenocryst, is different from the rest with a core of Fa29.1 (FeO/MnO = 43) and more abundant tiny inclusions. The wide (0.2 to 0.4 mm), inclusion-free mantle on this grain is Fa32.3 (FeO/MnO = 39.2). Pigeonite is zoned from Fs29.4Wo8.4 to Fs36.4 Wo14.1 (FeO/MnO = 28); augite is Fs21.8 Wo29.1. Maskelynite is slightly zoned with a compositional average of An52.1Or2.1. Chromite, cr# = 87, fe# = 90.4. Overall texture, mineral content and mineral compositions strongly suggest that this stone is paired with NWA 1068.  The specimen is lightly weathered and moderately shocked. Specimens: type specimen, 3.7 g and one thin section, NAU; main mass, Birdsell

Data from:
  MB89
  Table 7
  Line 214:
Place of purchase:Erfoud
Date:2004
Mass (g):18
Pieces:1
Class:Martian
Classifier:Ted Bunch, NAU
Type spec mass (g):3.7
Type spec location:NAU
Main mass:Birdsell
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Birdsell: Arizona Skies Meteorites, P.O. Box 2412, Flagstaff, AZ 86003, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
John and Dawn Birdsell   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
AJS Cosmic Treasures   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2047 unapproved names)

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