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Northwest Africa 1281
Basic information Name: Northwest Africa 1281
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1281
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 468 g
Classification
  history:
Recommended:  Diogenite-pm    [explanation]

This is 1 of 44 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 5 Sep 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 1281 (NWA 1281)

(Northwest Africa)

Purchased: 2002

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Adam and Greg Hupe in 2002 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Very fresh breccia composed predominantly of angular mineral clasts of diogenitic orthopyroxene (of several different compositions with widely different Mg/Fe ratios), olivine, calcic plagioclase, chromite, silica polymorph, pigeonite and subcalcic augite, plus sparse lithic clasts of quench-textured eucrite, set in a fine grained matrix containing ilmenite and Ni-poor metal. Eucritic clasts consist of acicular skeletal grains of pigeonite and very fine grained, indeterminate opaque mesostasis.

Geochemistry: Diogenitic orthopyroxene (Fs15.2-18.4Wo1.2-1.4, N = 6; Fs22.1-23.4Wo2.4-3.0, N = 2; Fs28.0Wo3.4; FeO/MnO = 27-31), pigeonite (Fs48.9Wo7.7; Fs56.2Wo9.5; FeO/MnO = 27-29), subcalcic augite (Fs44.4-47.3Wo25.5-29.8, N = 2; Fs61.8Wo25.9; FeO/MnO = 29-34), olivine (Fa32.8-40.4, FeO/MnO = 54-64, N = 4), plagioclase (An80.8-94.1Or0.4-0.1, N = 6).

Classification: Diogenite (polymict breccia).

Specimens: 22.8 g at UCLA; 0.95 g including one polished thin section at PSF; remainder with A. and G. Hupe.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2002
Mass (g):468
Pieces:2
Class:Diogenite-pm
Shock stage:low
Weathering grade:low
Fayalite (mol%):32.8-40.4
Ferrosilite (mol%):15.2-28.0; 48.9-56.2; 44.4-47.3; 61.8
Wollastonite (mol%):1.2-3.4; 7.7-9.5; 25.5-29.8; 25.9
Classifier:A. Irving, UWA and J. Boesenberg, BrownU
Type spec mass (g):23.8
Type spec location:22.8 g UCLA/0.95 g PSF
Main mass:A. and G. Hupe
Comments:Work name H117; 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)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 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)
UWA: University of Western Australia, 35 Hackett Drive, Crawley, Western Australia 6009, Australia (institutional address; updated 29 May 2012)
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)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Meteorites Australia   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Grünemeyer   
Gerald Armstrong   
jean bernard Delbauve   
Jörg-Florian Jensch   
METEORITES AUSTRALIA   
Geography: 
Coordinates:Unknown.

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

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