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Northwest Africa 3156
Basic information Name: Northwest Africa 3156
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3156
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 138 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 570 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 1 Sep 2006
Writeuphelp
Writeup from MB 91:

Northwest Africa 3156

Morocco

Find: 2004

Achondrite (ureilite)

History: Purchased in August 2004 by Greg Hupé from a Moroccan dealer in Tagounite.

Physical characteristics: A complete stone with thin fusion crust weighing 138 g.

Petrography: (A. Irving and S. Kuehner, UWS) Larger grains of pigeonite and olivine with reduced rims in a dominant matrix pigeonite, augite, orthopyroxene, sparse olivine, troilite, and kamacite. Geochemistry: pigeonite (Fs18.4– 18.6Wo5.9–6.0; FeO/MnO = 27.8–33.3; Cr2O3 = 1.08–1.11 wt%), olivine (Fa6.7–7.1; FeO/MnO = 13.2–14.0, Cr2O3 = 0.55, CaO = 0.25 [all as wt%]). Oxygen isotopes: (D. Rumble, CIW) Analyses of two acid-washed whole rock fragments by laser fluorination gave, respectively, δ18O = 7.69, 7.76; δ17O = 3.24, 3.32; Δ17O = −0.798, −0.763 (all ‰).

Classification: Achondrite (ureilite).

Type specimen: A total of 20 g of sample and one polished thin section are on deposit at UWS. G. Hupé holds the main mass.

Data from:
  MB91
  Table 2
  Line 151:
Place of purchase:Tagounite, Morocco
Date:2004 Aug
Mass (g):138
Pieces:1
Class:Ure
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWS
Main mass:G. Hupé
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
The Hupe Collection   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7675 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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