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Northwest Africa 12248
Basic information Name: Northwest Africa 12248
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12248
Observed fall: No
Year found: 2018
Country: Mauritania
Mass:help 37.3 g
Meteoritical Bulletin:  MB 107  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 323 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 24 Nov 2018
Writeup from MB 107:

Northwest Africa 12248 (NWA 12248)


Purchased: 2018 May

Classification: Lunar meteorite (feldspathic breccia)

History: Found in Mauritania and purchased by Darryl Pitt in May 2018 from a Mauritanian dealer.

Physical characteristics: A small (37.3 g) dark stone lacking fusion crust but coated by a shiny desert patina. The fresh interior conatins small white and beige clasts set in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of mineral clasts of anorthite, olivine, low-Ca pyroxenes, augite, ilmenite and troilite in a fine grained matrix containing Ni-poor metal and minor barite.

Geochemistry: Olivine (Fa44.5, FeO/MnO = 105; Fa13.1, FeO/MnO = 54; N = 2), low-Ca pyroxene (Fs38.2Wo4.5, FeO/MnO = 59), pigeonite (Fs32.0-32.5Wo14.6-9.7, FeO/MnO = 55-62, N = 2), augite (Fs22.4Wo43.1, FeO/MnO = 51), anorthite (An94.3-95.9Or0.2, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 9.5 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2018 May
Mass (g):37.3
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):13.1; 44.5
Ferrosilite (mol%):32.0-38.2
Wollastonite (mol%):14.6-4.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):9.5
Type spec location:UWB
Main mass:DPitt
Comments:Work name MVCH 371; 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 Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 201 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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