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Northwest Africa 5744
Basic information Name: Northwest Africa 5744
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5744
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 170 g
Meteoritical Bulletin:  MB 96  (2009)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 102 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 16 Apr 2009
Writeup from MB 96:

Northwest Africa 5744


Find: February 2009

Achondrite (lunar, granulitic troctolitic breccia)

History: Found near Gawa, Mali, in February 2009 and purchased from a dealer by Adam Aaronson.

Physical characteristics: A single, buff-colored, rounded stone (170 g) lacking fusion crust (Fig. 2). Small white clasts are visible in a pale, finer grained matrix.

Petrography (A. Irving and S. Kuehner, UWS; T. Bunch, NAU): Recrystallized breccia composed mainly of plagioclase (up to 100 μm) with fine-grained (<50 μm) olivine, pigeonite, orthopyroxene, and accessory Ti-chromite and Ni-bearing troilite.

Geochemistry: Plagioclase (An97.9Or0.1), olivine (Fa20.7, FeO/MnO = 76.9–94.5), pigeonite (Fs16.6Wo9.7, FeO/MnO = 50).

Bulk composition (R. Korotev, WUSL): INAA on a 185 mg fragment gave FeO 5.7 wt%, Na2O 0.25 wt%; Sc 8.3, Cr 1050, La 1.1, Sm 0.47, Eu 0.58, Yb 0.42, Th 0.15, all in ppm.

Classification: Achondrite (lunar, granulitic troctolitic breccia).

Specimens: A total of 13.1 g and two polished thin sections are on deposit at UWS; a 7.1 g of sample is at NAU. The main mass is held by an anonymous collector.

Data from:
  Table 2
  Line 73:
Mass (g):170
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):20.7
Ferrosilite (mol%):16.6
Wollastonite (mol%):9.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWS
Main mass:Anon
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 96, MAPS 44, 1355-1397 (2009)
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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