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Northwest Africa 11321
Basic information Name: Northwest Africa 11321
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11321
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 247 g
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 123 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Jul 2017
Writeup from MB 106:

Northwest Africa 11321 (NWA 11321)

(Northwest Africa)

Purchased: 2017 Mar

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by Darryl Pitt in March 2017 from a Mauritanian dealer.

Petrography: (A. Irving and S. Kuehner, UWS) The specimen has an overall subophitic igneous texture, but domains of different grainsize are juxtaposed as a result of cross-cutting microfaults. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, Ti-chromite, ilmenite and troilite.

Geochemistry: Orthopyroxene host (Fs60.6-63.0Wo3.7-2.3, FeO/MnO = 31-32, N = 2), clinopyroxene exsolution lamellae (Fs27.6-27.7Wo42.7-42.9, FeO/MnO = 33-34, N = 2), plagioclase (An84.5-87.8Or0.7-0.6, N = 2).

Classification: Eucrite (unbrecciated, subophitic).

Specimens: 20.1 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2017 Mar
Mass (g):247.1
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):60.6-63.0; 27.6-27.7
Wollastonite (mol%):3.7-2.3; 42.7-40.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 262; submitted by A. Irving
   and collections
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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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.
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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