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Northwest Africa 3151
Basic information Name: Northwest Africa 3151
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3151
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 1500 g
Meteoritical Bulletin:  MB 90  (2006)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 60 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Approved 25 Jun 2005
Writeup from MB 90:

Northwest Africa 3151

Morocco or Algeria

Find: April 2005

Achondrite (brachinite)

History: A 1500 g complete stone with a thin, translucent crust was purchased by G. Hupé in Tagounite, Morocco, in April 2005.

Petrography and Geochemistry: (A. Irving and S. Kuehner, UWS) Coarse-grained dunitic rock (grain size 0.7–1.6 mm) with protogranular texture, composed predominantly of olivine (Fa35.7; FeO/MnO = 81; 95 vol%) with minor clinopyroxene (Fs10.5–10.6Wo44.7–45.2; FeO/MnO = 44; Cr2O3 = 0.65 Al2O3 = 0.95 [both wt%]), altered metal (with some relict taenite), troilite, chromite (Cr/(Cr+Al) = 0.727–0.731) with very rare K-poor, sodic plagioclase (An36.2–39.9Or0.2), and orthopyroxene. Although the silicate minerals are fresh, terrestrial weathering has altered some of the primary metal to hydroxides, which also form thin coatings along grain boundaries. Oxygen isotopes: (D. Rumble, CIW) Replicate analyses of acid-washed whole rock samples by laser fluorination gave δ18O = +4.86 ± 0.03, δ17O = +2.42 ± 0.02, ∆17O = −0.15 ± 0.02 (all ‰).

Classification: Achondrite (brachinite).

Specimens: A 20 g type specimen and one polished thin section are on deposit at UWS. GHupé holds the main mass.

Data from:
  Table 2
  Line 192:
Place of purchase:Tagounite, Morocco
Date:Apr 2005
Mass (g):1500
Type spec mass (g):20
Plots: O isotopes:  
   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)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Photos from the Encyclopedia of Meteorites:
Don Edwards         
The Hupe Collection   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Anthony James   
Don Cuarzo   
John Lutzon   
Solar Anamnesis      
Woreczko Jan & Wadi   

     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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