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Northwest Africa 2977
Basic information Name: Northwest Africa 2977
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2977
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 233 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Lunar (gabbro)
Recommended:  Lunar (gabbro)    [explanation]

This is 1 of 8 approved meteorites classified as Lunar (gabbro).   [show all]
Search for other: Lunar meteorites
Comments: Approved 16 Jan 2006
Revised 3 Feb 2006: Revised writeup
Writeuphelp
Writeup from MB 90:

Northwest Africa 2977

Morocco or Algeria

Find: 2005 November

Achondrite (lunar, gabbro)

History: A single minimally weathered fusion-encrusted stone of 233 g was purchased from a Moroccan dealer in Tagounite, Morocco, by MFarmer in November 2005.

Petrography and Geochemistry: (J. Wittke and T. Bunch, NAU; A. Irving, UWS) The specimen consists of a single yellow-green, relatively coarse-grained rock traversed by thin, black glass-rich veins. It is an olivine-rich, two-pyroxene cumulate gabbro composed of olivine (Fa31.7; FeO/ MnO = 96; 52 vol%), (Fs26.6Wo6.7; 23 vol%), augite (Fs16.2Wo29; 9 vol%), and plagioclase (An56; 14 vol%) with minor amounts of Ba-K feldspar, chromite, ilmenite, and merrillite. Larger pigeonite grains commonly enclose equant olivine grains, which contain abundant melt inclusions (0.025–0.125 mm). Plagioclase is partially converted to maskelynite, and pyroxenes and olivine exhibit shock lamellae and undulatory extinction. Note: This specimen is identical in texture and mineral composition to the gabbro clasts in NWA 773 and NWA 2700 and thus appears to be paired with those breccia specimens.

Classification: Achondrite (lunar, gabbro); minimal weathering.

Specimens: A 20.1 g type specimen and one polished thin section are on deposit at NAU. A 0.5 g specimen is on deposit at WUSL. An anonymous owner holds the main mass.

Data from:
  MB90
  Table 2
  Line 189:
Place of purchase:Tagounite, Morocco
Date:Nov 2005
Mass (g):233
Pieces:1
Class:Lunar
Weathering grade:minimal
Type spec mass (g):20.1
Comments:Paired with NWA 773 and NWA 2700
Institutions
   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)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Jim Strope      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ale bartolommei-giulio M.   
David L. Ribeca   
Gerald Armstrong   
Jim Strope   
MeteoriteCollector.org - FCOM - Russ Finney      
Robert Zdancewicz   
Solar Anamnesis   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5792 approved meteorites from (Northwest Africa) (plus 2067 unapproved names)

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