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Northwest Africa 3190
Basic information Name: Northwest Africa 3190
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 3190
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass:help 40.7 g
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 102 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Jan 2008
Revised 4 Aug 2008: final writeup
Writeup from MB 93:

Northwest Africa 3190

Northwest Africa

Find: 2006

Achondrite (lunar, mingled breccia)

History and Physical characteristics: A. Aaronson purchased a 40.7 g partially crusted, complete stone in Rissani, Morocco, in December 2006. The hand specimen exhibits an abundance of large (between 0.6 and 2.1 mm in diameter) anorthositic clasts. The weathered portion of the crust is pale vermillion to light brown; the fresher crust is dark gray to black.

Petrography: (T. Bunch and J. Wittke, NAU; A. Irving, UWS) This mingled breccia contains anorthositic lithologies that include anorthosite, anorthositic norites, gabbros, and troctolites, in addition to variolitic and subophitic basalt clasts, breccia-within-breccia clasts, and an abundance of olivine and plagioclase fragments. Melt and fragmental matrices are heterogeneously distributed. The interior shows very low weathering effects.

Mineral compositions: Anorthositic norite orthopyroxene (Fs28.5Wo3.8; FeO/MnO = 65). Olivine gabbro contains olivine (Fa26.2; FeO/MnO = 96), plagioclase (An92.3), subcalcic pyroxene (Fs21.6Wo14.4; FeO/MnO = 48), and ilmenite with MgO = 6.5 wt%. Variolitic basalt has olivine (Fa35.7; FeO/MnO = 103), pigeonite (Fs24.6Wo8.7) and plagioclase (An95.5). Bulk composition: (R. Korotev, WUSL) FeO = 9.6 wt%, Sm = 3.9 ppm, Th = 1.4 ppm, Ir = 6.5 ppb.

Classification: Achondrite (lunar, mingled breccia). Probably paired with NWA 2995, based on essentially identical bulk compositions.

Type specimens: A total of 8.8 g is on deposit at NAU. The main mass holder is anonymous.

Submitted by: T. Bunch, NAU.

Data from:
  Table 2
  Line 12:
Place of purchase:Rissani, Morocco
   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. 93, MAPS 43, 571-632 (2008)
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     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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