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Northwest Africa 1817
Basic information Name: Northwest Africa 1817
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1817
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 728 g
Classification
  history:
Meteoritical Bulletin:  MB 88  (2004)  Mesosiderite
MetBase:  v. 7.1  (2006)  Mesosiderite-B
Recommended:  Mesosiderite-B    [explanation]

This is 1 of 6 approved meteorites classified as Mesosiderite-B.   [show all]
Search for other: Class B mesosiderites, Mesosiderites, and Metal-rich meteorites
Writeuphelp
Writeup from MB 88:

Northwest Africa 1817

Morocco

Purchased 2003 January

Mesosiderite

A complete stony-iron meteorite (728 g) was purchased in Rissani by a Moroccan dealer for N. Oakes (Oakes) in 2003 January.  Classification and mineralogy (A. Irving and S. Kuehner, UWS): Subequal amounts of metal and silicates in a coarse grained, unbrecciated, plutonic igneous texture.  Metal (about 40 vol%) is concentrated in spheroidal clusters interspersed with more silicate-rich material, and consists mainly of kamacite with included rounded taenite grains and rare schreibersite.  The remainder of the sample consists mainly of orthopyroxene (Fs31Wo2, FeO/MnO = 23.2-30.1) with lesser amounts of anorthitic plagioclase (An92), irregularly-distributed olivine (~Fa40, FeO/MnO = 42.3), a silica polymorph, troilite and chromite.  Oxygen isotopes (D. Rumble, CIW): replicate analyses of acid-washed pyroxene-rich fragments by laser fluorination, δ18O = 3.19, δ17O = 1.46, Δ17O = -0.22 ± 0.04 ‰.  This sample appears to be paired with NWA 1878.  Specimens: type specimen, 22.4 g, UWS; main mass, Oakes.

Data from:
  MB88
  Table 4
  Line 30:
Place of purchase:Rissani
Date:P Jan 2003
Mass (g):728
Pieces:1
Class:Mes
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.4
Main mass:Oakes
Plots: O isotopes:  
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards      
Nakhladog   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mirko Graul      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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