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Northwest Africa 8591
Basic information Name: Northwest Africa 8591
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8591
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 89.8 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 30 Oct 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8591 (NWA 8591)

(Northwest Africa)

Purchased: 2014 Jan

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by F. Kuntz in January 2014 from a dealer in Rissani, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fresh monomict breccia composed of basaltic eucrite clasts and related debris. Pyroxenes are compositionally zoned; other minerals include very calcic plagioclase, silica polymorph, fayalitic olivine, ilmenite, troilite and Ni-free metal.

Geochemistry: Pigeonite (core Fs33.0Wo6.6, FeO/MnO = 28; rim Fs54.1Wo5.0, FeO/MnO = 31), subcalcic augite (Fs38.5Wo31.2, FeO/MnO = 29), augite (Fs28.2Wo39.9, FeO/MnO = 28), olivine (Fa83.1-83.5, FeO/MnO = 38-40).

Classification: Eucrite (monomict breccia).

Specimens: 18.79 g including one polished thick section at PSF; main mass with Kuntz.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P 2014 Jan
Mass (g):89.8
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Fayalite (mol%):83.1-83.5
Ferrosilite (mol%):54.1; 33.0
Wollastonite (mol%):5.0; 6.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):18.79
Type spec location:PSF
Main mass:F. Kuntz
Comments:K214; submitted by P. Sipiera
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)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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