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Northwest Africa 2995
Basic information Name: Northwest Africa 2995
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2995
Observed fall: No
Year found: 2005
Country: Algeria
Mass:help 538 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Lunar (feldspathic breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia).   [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 2995

Algeria

Find: 2005

Achondrite (lunar feldspathic breccia)

History: A 538 g fully crusted and minimally weathered stone was purchased in Morocco by A. Aaronson in November 2005.

Petrography and Geochemistry: (T. Bunch and J. Wittke, NAU) The feldspathic fragmental breccia contains many highlands fine-grained lithologies. Norite: Orthopyroxene (Fs26.4Wo4; FeO/MnO = 66). Olivine basalt: Olivine (Fa87.2; FeO/MnO = 95), plagioclase (An84.7). Subophitic basalt: Ca pyroxene (Fs25–48Wo37.1–25.9), pigeonite (Fs27.8–31.7Wo15.4–9.3; FeO/MnO = 53), olivine (Fa36.3; FeO/MnO = 90), plagioclase (An97). Gabbro: Olivine (Fa34.7; FeO/MnO = 95), pigeonite (Fs28.2Wo8.9; FeO/MnO = 67), plagioclase (An94). KREEPy-like basalt: Plagioclase (Ab50Or17.4), K feldspar (Ab14.3Or83) in addition to silica, phosphate, and Fe-rich pyroxenes. Troctolite: olivine (Fa30.8; FeO/MnO = 94), plagioclase (An94.7). Granulitic impact melts: Olivine (Fa31), orthopyroxene (Fs25.2Wo3.4), plagioclase (An95). Anorthosite: (An92.7–96.8), glassy impact melts, coarse-grained mineral fragments, and a 0.350 mm-size grain of meteoritic Ni, Fe-metal (Ni = 6.3, Co = 1.0 [both wt%]). In addition, the assemblage appears to be characterized by large amounts of breccias within breccias with at least four generations of brecciation observed in one centimeter-size breccia clast. Numerous shock-induced melt veins are present along large breccia clast margins as well as isolated melt pockets within clasts. Interior weathering grade is very low, all glasses are fresh, and no apparent terrestrial alteration veins were noted.

Classification: Achondrite (lunar, feldspathic breccia).

Specimens: A 21.2 g type specimen is on deposit at NAU. Aaronson holds the main mass.

Data from:
  MB90
  Table 2
  Line 190:
Place of purchase:Algeria
Date:2005
Mass (g):538
Pieces:1
Class:Lunar
Type spec mass (g):21.2
Institutions
   and collections		 NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Mike Farmer         
The Hupe Collection   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Michael S. Scherman   
trangmoe   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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Revision
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