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Northwest Africa 8054
Basic information Name: Northwest Africa 8054
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8054
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 118 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Achondrite-ung
Recommended:  Achondrite-ung    [explanation]

This is 1 of 88 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 30 Nov 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 8054 (NWA 8054)

(Northwest Africa)

Purchased: 2013 Sep

Classification: Ungrouped achondrite

History: Four similar looking stones were found together between Smara and Tan Tan in southern Morocco. Adam Aaronson purchased the stones in Agadir in September 2013.

Physical characteristics: Four black stones lacking fusion crust (totaling 118 g).

Petrography: (A. Irving and S. Kuehner, UWS) Protogranular texture. Composed predominantly of magnesian orthopyroxene (with more ferroan rims), clinopyroxene, some magnesian olivine, minor intermediate plagioclase and Cr-troilite. Blebs of kamacite occur on grain boundaries and within mafic silicate grains.

Geochemistry: Olivine (cores Fa4.0-4.2, rims Fa2.2-2.9, Cr2O3 = 0.3 wt.%), orthopyroxene (Fs1.1Wo2.5), clinopyroxene (Fs2.3-2.4Wo35.6-36.1). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed silicate material by laser fluorination gave, respectively: δ17O = -1.599, -1.551; δ18O = 0.341, 0.372; Δ17O = -1.778, -1.747 (all per mil).

Classification: Achondrite (ungrouped).

Specimens: 20.1 g and one polished thin section are at UWB. The remainder is held by Aaronson.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2013 Sep
Mass (g):118
Pieces:4
Class:Achondrite-ung
Shock stage:low
Weathering grade:low
Fayalite (mol%):4.0-4.2
Ferrosilite (mol%):1.1; 2.3-2.4
Wollastonite (mol%):2.5; 35.6-36.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1576; submitted by A. Irving
Plots: O isotopes:  
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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