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Northwest Africa 1877
Basic information Name: Northwest Africa 1877
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1877
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 312 g
Classification
  history:
Meteoritical Bulletin:  MB 88  (2004)  Diogenite-olivine
MetBase:  v. 7.1  (2006)  Diogenite-an
Recommended:  Diogenite-an    [explanation]

This is 1 of 4 approved meteorites classified as Diogenite-an.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeuphelp
Writeup from MB 88:

Northwest Africa 1877

Morocco

Purchased 2003 June

Achondrite (Olivine-rich diogenite)

A partly crusted stony meteorite (312 g) was purchased in Zagora by a Moroccan dealer for A. and G. Hupé (xHupé) in 2003 June and more of the same material (622 g) was purchased in Tagounite in 2003 December. Classification and mineralogy (A. Irving and S. Kuehner, UWS): Coarse grained, dense and somewhat friable, with an overall yellow-green color.  Harzburgitic peridotite composed of subequal amounts of orthopyroxene (Fs22.4-23.3Wo1.5; FeO/MnO = 25.2-29.7) and olivine (Fa27.8, FeO/MnO = 44-50) with minor Al-poor chromite [Cr/(Cr+Al) = 84.8-88.0, Mg/(Mg+Fe) = 11.7-19.8], troilite (as abundant blebs within silicates and as inclusions in chromite), and sparse Ni-free metal (partly altered to limonite).  The modal amount of olivine estimated from three serial thin sections is approximately 45%, which is consistent with the moderately high density of this meteorite. The relatively magnesian silicate compositions are similar to those in Antarctic olivine diogenite GRA 98108, and quite different from those in another Moroccan olivine diogenite NWA 1459 (Irving et al., 2003).  Unlike both of these examples, however, NWA 1877 does not contain plagioclase.  Specimens: type specimen, 24 g and three polished thin sections, UWS; main mass, xHupé.

Data from:
  MB88
  Table 4
  Line 44:
Date:Jun 2003
Mass (g):312
Pieces:1
Class:Achon
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)
xHupé: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Matteo Chinellato   
Shinishi Kato   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
abibou   
Achim Sven Faforke      
Aeroliths Collection Theodossiou         
Alessandro Takeda   
Anthony James   
Argus Rocks   
Auricular   
Christophe PICQ   
Dave Johnson   
Edward Krikorian   
Gerald Armstrong                     
Matteo Chinellato   
Michael S. Scherman   
Rene Schmit   
Robert Zdancewicz   
stephen dunklee   
The Wilcox Collection of Meteorites         
Woreczko Jan & Wadi            
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6709 approved meteorites from (Northwest Africa) (plus 2022 unapproved names)

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