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Northwest Africa 11453
Basic information Name: Northwest Africa 11453
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11453
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 73.1 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 341 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 13 Oct 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11453 (NWA 11453)

(Northwest Africa)

Purchased: 2017 Apr

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Fabien Kuntz in April 2017 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of gabbroic and diabasic eucrite clasts plus coarse related debris in a sparse finer grained matrix. Some diogenitic orthopyroxene (~2 vol.%) is also present. Other minerals are exsolved pigeonite, calcic plagioclase, unexsolved pigeonite, augite, silica polymorph, ilmenite, chromite, troilite, merrillite and stained Ni-free metal.

Geochemistry: Diogenitic orthopyroxene (Fs23.3-24.1Wo2.3-2.2, FeO/MnO = 28-32, N = 2), host orthopyroxene (Fs56.0-60.3Wo4.4-4.3, FeO/MnO = 24-30, N = 2), clinopyroxene exsolution lamella (Fs26.1Wo41.5, FeO/MnO = 29), augite (Fs9.8Wo44.3; Fs16.3Wo43.5; FeO/MnO = 23; N = 2), pigeonite (Fa36.5Wo21.3, FeO/MnO = 26), plagioclase (An77.5-79.0Or1.5, N = 2).

Classification: Eucrite (polymict breccia).

Specimens:15.31 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2017 Apr
Mass (g):73.1
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):23.3-24.1; 56.0-60.3; 26.1
Wollastonite (mol%):2.3-2.2; 4.4-4.3; 41.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):15.31
Type spec location:PSF
Main mass:F. Kuntz
Comments:Work name K334; 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)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Geography: 
Coordinates:Unknown.

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

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