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Northwest Africa 6470
Basic information Name: Northwest Africa 6470
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6470
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 96 g
Meteoritical Bulletin:  MB 99  (2011)  Lunar (feld. brec.)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 290 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 15 Apr 2011
Writeup from MB 99:

Northwest Africa 6470 (NWA 6470)


Found: 2009

Classification: Lunar meteorite (feldspathic breccia)

History: Found in southern Morocco in 2009 and purchased by Jason Utas in April 2010 from a dealer in Ouarzazate, Morocco.

Physical characteristics: A fine-grained, dark gray, 96 g stone containing dispersed small white clasts.

Petrography: The specimen consists of small mineral clasts and sparse lithic clasts (some with ophitic textures) in a very fine-grained, heterogeneous, partly glassy and in places vesicular matrix. Mineral clasts include anorthitic plagioclase, subcalcic augite, pigeonite, olivine, Mg-bearing ilmenite, kamacite, baddeleyite and troilite.

Geochemistry: Pigeonite (Fs23.6-26.9Wo16.2-7.0, FeO/MnO = 51-59), subcalcic augite (Fs21.0Wo36.1, FeO/MnO = 58), olivine (Fa21.9-29.3, FeO/MnO = 84-107), plagioclase (An91.6-95.2Or0.5-0.2). Bulk composition (R. Korotev, WUSL): FeO 5.6 wt%, La 11.1 ppm, Sm 5.0 ppm, Yb 3.24 ppm, Th 1.63 ppm.

Classification: Achondrite (lunar, feldspathic breccia). This stone is very similar in texture, mineral compositions and bulk composition to NWA 4936, NWA 5406, NWA 6221 and NWA 6355. It apparently is paired with those stones and is reportedly from the same find location.

Specimens: A total of 19.2 g of sample are on deposit at UWS. The main mass is held by Utas.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Mass (g):96
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):21.9-29.3
Ferrosilite (mol%):23.6-26.9; 21.0
Wollastonite (mol%):16.2-7.0; 36.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):19.2
Type spec location:UWS
Main mass:Utas
Comments:Submitted by A. Irving
   and collections
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)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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     This is 1 of 1929 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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