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Northwest Africa 8454
Basic information Name: Northwest Africa 8454
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8454
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 234 g
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 259 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Mar 2016
Writeup from MB 105:

Northwest Africa 8454 (NWA 8454)

(Northwest Africa)

Purchased: 2014 Jan

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Pierre-Marie Pele in January 2014 from a dealer in Tata, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental monomict breccia composed of fairly closely-packed angular to rounded basaltic eucrite clasts in a sparse matrix of related crystalline debris. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, fayalite and troilite.

Geochemistry: Olivine (Fa76.8-77.6; FeO/MnO = 44, N=3), host orthopyroxene (Fs59.6-60.1Wo4.3-2.3; FeO/MnO = 31, N=3), clinopyroxene exsolution lamellae (Fs29.2-30.4Wo40.3-40.4; FeO/MnO = 30-33, N=3).

Classification: Eucrite (basaltic, monomict breccia).

Specimens: Type specimen plus one polished thin section are at PSF; main mass with Mr. P. Pele.

Data from:
  Table 0
  Line 0:
Place of purchase:Tata
Date:P 2014 Jan
Mass (g):234.18
Shock stage:low
Weathering grade:low
Fayalite (mol%):76.8-77.6 (N=3)
Ferrosilite (mol%):59.6-60.1 (N=3); 29.2-30.4 (N=3)
Wollastonite (mol%):4.3-2.3; 40.3-40.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:PSF
Main mass:P. Pele
Comments:EUC4; submitted by P. Sipiera
   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)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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