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Northwest Africa 2696
Basic information Name: Northwest Africa 2696
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2696
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 15 kg
Classification
  history:
Recommended:  Eucrite-br    [explanation]

This is 1 of 180 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Sep 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 2696 (NWA 2696)

Northwest Africa

Purchased: 2004

Classification: HED achondrite (Eucrite, brecciated)

History: Purchased by Greg Hupé in 2004 from several Moroccan dealers.

Petrography: (A. Irving, UWS and J. Boesenberg, Brown U) Breccia containing some fine- to medium-grained eucrite clasts plus abundant related angular crystalline debris. Minerals are exsolved pigeonite, calcic plagioclase, unexsolved pigeonite, subcalcic augite, ilmenite, silica, chromite, altered Ni-free metal and troilite. No olivine or diogenitic orthopyroxene was found in the studied thin section.

Geochemistry: Low-Ca pyroxene host (Fs55.9-57.8Wo2.6-4.6, FeO/MnO = 27-29, N = 7), augite exsolution lamellae (Fs26.5-29.2Wo38.2-41.2, FeO/MnO = 26-28, N = 2), pigeonite (Fs44.6-48.8Wo19.5-14.7; Fs54.0Wo7.6; FeO/MnO = 25-29, N = 6), subcalcic augite (Fs39.7-42.0Wo27.0-24.0, FeO/MnO = 25-29, N = 2), plagioclase (An76.8-93.1Or1.9-0.5, N = 5).

Classification: Eucrite (breccia).

Specimens: 28 g including one polished thin section at PSF; remainder with Mr. G. Hupé.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2004
Mass (g):~15000
Pieces:many
Class:Eucrite-br
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):55.9-57.8; 26.5-29.2; 44.6-48.8
Wollastonite (mol%):2.6-4.6; 38.2-41.2; 19.5-14.7
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):28.0
Type spec location:PSF
Main mass:G. Hupe
Comments:Submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Michael Cottingham      
Peter Marmet   
The Hupe Collection   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
abibou   
Alessandro Takeda   
André Knöfel   
bphd   
Carlos Di Pietro Bella      
David L. Ribeca   
Denis gourgues   
Edward Krikorian   
Gerald Armstrong   
harlan trammell   
Jean-Michel Masson                        
Krzysztof Nowak   
METEORITICON      
Michael S. Scherman   
Mike Smith   
Piotr gural100   
Robert Zdancewicz   
Stefano Prosperi   
stephen dunklee   
Suzanne De Paula   
The Wilcox Collection of Meteorites      
Volker Heinrich   
Woreczko Jan & Wadi   
xeqtr   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7472 approved meteorites from (Northwest Africa) (plus 1988 unapproved names)

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