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Northwest Africa 2996
Basic information Name: Northwest Africa 2996
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2996
Observed fall: No
Year found: 2006
Country: Algeria
Mass:help 968 g
Meteoritical Bulletin:  MB 95  (2009)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 101 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 8 Sep 2008
Writeup from MB 95:

Northwest Africa 2996


Find: 2006

Achondrite (lunar, feldspathic breccia)

History and physical characteristics: A 968 g, partially crusted stone, was purchased in Morocco in November 2006 by Adam Aaronson and sold to a private collector in 2007. The weathered crust shows a color range of vermillion to dark brown to black. Several anorthositic clasts exposed on broken surfaces are as large as 3 cm.

Petrography (T. Bunch and J. Wittke, NAU): This feldspathic breccia has an extensive melt matrix with prominent entrainments of tiny bubbles. Lithologies include anorthosite, medium-grained gabbros, anorthositic norites and troctolites, in addition to mineral fragments, shocked clasts, and devitrified glassy clasts.

Mineral compositions: A medium-grained gabbroic clast contains plagioclase (An92.1), olivine (Fa32.4, FeO/MnO = 110), Ca pyroxene (Fs22.4Wo19.1), chromite (cr# = 61) and ilmenite (MgO = 5.3 wt%). Anorthositic norite low-Ca pyroxene is Fs28.6Wo3.1 (FeO/MnO = 64), troctolitic olivine is Fa31.9, FeO/MnO = 104 and plagioclase clasts range from An91.8 to An97.4. Bulk chemistry (R. Korotev, WUSL): TiO2 = 0.68 wt%, Al2O3 = 20.7 wt%, FeO = 9.7 wt%, MgO = 8.0 wt%, Ni = 184 ppm, Sm = 4.6 ppm and Th = 1.6 ppm.

Classification: Lunar (feldspathic breccia).

Type specimen: A total of 20.3 g is on deposit at NAU. The main mass holder is anonymous.
Data from:
  Table 2
  Line 39:
Place of purchase:Algeria
Mass (g):968
Fayalite (mol%):32.4
Ferrosilite (mol%):22.4
Wollastonite (mol%):19.1
Classifier:T. Bunch and J. Wittke, NAU
Type spec mass (g):20.3
Type spec location:NAU
Main mass:anonymous
Comments:Feldspathic breccia
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 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. 95, MAPS 44, 429-462 (2009)
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     This is 1 of 1246 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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