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Northwest Africa 7274
Basic information Name: Northwest Africa 7274
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7274
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 373 g
Meteoritical Bulletin:  MB 101  (2012)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 315 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Oct 2012
Writeup from MB 101:

Northwest Africa 7274 (NWA 7274)

(Northwest Africa)

Purchased: 2012 Feb

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by by Darryl Pitt and David Gheesling from a dealer in Zagora, Morocco, in 2012 February.

Physical characteristics: A single stone (372.6 g) lacking fusion crust, exhibiting small feldspathic clasts in a darker matrix. One broadly curved side of the stone is fairly fresh (but with beige weathering products in fractures), whereas the other broken sides are coated with desert varnish.

Petrography: (A. Irving, S. Kuehner & N. Castle, UWS; R. Mills, JSC). Fine fragmental breccia composed of anorthite, olivine, augite, pigeonite and orthopyroxene with accessory kamacite, ilmenite and troilite.

Geochemistry: Olivine (Fa8.6; 25.7; FeO/MnO = 81-101), orthopyroxene (Fs23.3Wo4.6, FeO/MnO = 69), pigeonite (Fs44.9Wo9.9, FeO/MnO = 54), ferropigeonite (Fs82.2Wo15.8, FeO/MnO = 81), subcalcic augite (Fs18.0-32.1Wo34.6-37.8, FeO/MnO = 47-58), plagioclase (An95.7-97.0Or0.1). Bulk composition (R. Korotev, WUSL): mean values from INAA of subsamples are 6.2 wt.% FeO, 11.8 ppm Sc, 310 ppm Ni, 10.5 ppm La, 4.8 ppm Sm, 0.94 ppm Eu, 3.5 ppm Yb, 1.9 ppm Th.

Classification: Lunar (feldspathic breccia).

Specimens: 20 g of material is on deposit at UWB. The main mass is owned jointly by D. Pitt and D. Gheesling.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2012 Feb
Mass (g):372.6
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):1.2-5.2
Ferrosilite (mol%):1.3-1.8
Wollastonite (mol%):0.6-4.6
Classifier:A. Irving, S. Kuehner, and N. Castle, UWS, and R. Mills, JSC
Type spec mass (g):20.1
Type spec location:UWB
Main mass:D. Pitt/D. Gheesling
Comments:Submitted by A. Irving
   and collections
JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022)
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)
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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