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Northwest Africa 4945
Basic information Name: Northwest Africa 4945
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4945
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 3.15 kg
Meteoritical Bulletin:  MB 100  (2012)  EL6
Recommended:  EL6    [explanation]

This is 1 of 124 approved meteorites classified as EL6.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 16 Sep 2011
Writeup from MB 100:

Northwest Africa 4945 (NWA 4945)

(Northwest Africa)

Purchased: 2007 March

Classification: Enstatite chondrite (EL6)

History: Purchased from a dealer in Agadir, Morocco, by Jack Schrader in March 2007

Physical characteristics: An unweathered stone weighing 3150 g coated with dark brown, satiny fusion crust

Petrography: (A. Irving and S. Kuehner, UWS): Fine grained aggregate of predominantly enstatite (74 vol%), kamacite (8 vol%) and Cr-bearing troilite (8 vol.%), with accessory diopside, oldhamite, alabandite and tabular graphite plates. Daubreelite and schreibersite are absent. Sparse relict, partial RP chondrules and recrystallized chondrules.

Geochemistry: Orthopyroxene (Fs0.1-0.3Wo1.5-1.4), clinopyroxene (Fs0.2-0.9Wo45.9), kamacite (7.2 wt.% Ni, 1.0 wt.% Si, 0.5 wt.% Co), troilite (0.3 wt.% Ti, 2.6 wt.% Cr, 0.8 wt.% Mn), alabandite (1.0 wt.% Cr, 26.7 wt.% Fe, 21.6 wt.% Mn, 7.5 wt.% Mg, 1.3 wt.% Ca)

Classification: Enstatite chondrite (EL6, S1, W0). Paired with Northwest Africa 4946.

Specimens: A total of 20.3 g of type material and one polished thin section are on deposit at UWS; a further 20 g of the same stone and one polished thin section are on deposit at BathO. The main mass is held by MFarmer.

Data from:
  Table 1
  Line 1205:
Place of purchase:Agadir
Date:P 2007 March
Mass (g):3150
Shock stage:S1
Weathering grade:W0
Ferrosilite (mol%):0.2-0.9
Wollastonite (mol%):45.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.3
Type spec location:UWS
Main mass:MFarmer
Comments:Submitted by A. Irving
   and collections
BathO: Bathurst Observatory Research Facility, 624 Limekilns Road, Kelso NSW 2795, Australia (institutional address; updated 27 Jul 2012)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
Paul Griffin   

     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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