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Northwest Africa 12627
Basic information Name: Northwest Africa 12627
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12627
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 701 g
Meteoritical Bulletin:  MB 108  (2020)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 383 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 21 Nov 2019
Writeup from MB 108:

Northwest Africa 12627 (NWA 12627)

(Northwest Africa)

Purchased: 2019 Feb

Classification: HED achondrite (Eucrite, polymict)

History: Purchased in February 2019 by Darryl Pitt from a Mauritanian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia containing some lithic eucrite clasts (with diabasic, fine-intersertal and granulitic textures) but mostly composed of related crystalline debris together with rare diogenitic orthopyroxene set in a finer grained matrix containing rare kamacite. Eucritic material consists of exsolved pigeonite, calcic plagioclase, ferroan pigeonite, silica polymorph, fayalite, ilimenite, troilite and baddeleyite.

Geochemistry: Augite host (Fs36.3Wo36.4 and Fs40.4Wo36.1, FeO/MnO = 33 and 35; N = 2), ferroan pigeonite (Fs57.3Wo8.1 and Fs58.9Wo10.7, FeO/MnO = 35 and 37, N =2), orthopyroxene host (Fs62.8Wo4.6, FeO/MnO = 37), diogenitic orthopyroxene (Fs25.1Wo2.7, FeO/MnO = 31), fayalite (Fa82.6, FeO/MnO = 45), plagioclase (An89.8-90.8Or0.3, N = 2).

Classification: Eucrite (polymict breccia).

Specimens: 24.5 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2019 Feb
Mass (g):701
Shock stage:low
Weathering grade:low
Fayalite (mol%):82.6
Ferrosilite (mol%):25.1
Wollastonite (mol%):2.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):24.5
Type spec location:UWB
Main mass:DPitt
Comments:Work name MVCH 457; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
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 Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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