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Northwest Africa 6570
Basic information Name: Northwest Africa 6570
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6570
Observed fall: No
Year found: 2010
Country: Morocco
Mass:help 415 g
Meteoritical Bulletin:  MB 99  (2011)  Lunar (feld. brec.)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 315 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 6570 (NWA 6570)


Found: 2010

Classification: Lunar meteorite (feldspathic breccia)

History: Found in southern Morocco in 2010 and purchased from the finder by Adam Aaronson in December 2010.

Physical characteristics: A single fine grained, brittle stone (415 g) lacking fusion crust. The interior is dark gray with dispersed small white clasts.

Petrography: (A. Irving and S. Kuehner, UWS) Sparse felsic lithic clasts and mineral debris are enclosed within a dark, partly glassy and vesicular matrix. Mineral clasts include pigeonite, subcalcic augite, anorthitic plagioclase, olivine, ilmenite, kamacite and troilite.

Geochemistry: Olivine (Fa29.5-29.6; FeO/MnO = 92-120), pigeonite (Fs26.9-28.5Wo10.0-12.7, Fs43.7Wo5.6; FeO/MnO = 58-70), subcalcic augite (Fs31.6Wo29.6; FeO/MnO = 61), plagioclase (An91.5-95.4Or0.4-0.3).

Classification: Achondrite (lunar, feldspathic breccia). This specimen is texturally and mineralogically identical to NWA 4936, NWA 5406, NWA 6221, NWA 6355 and NWA 6470 found in the same area, and evidently is paired with those stones.

Specimens: A total of 20.0 g of sample is on deposit at UWS. The main mass is held by Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Mass (g):415
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):29.5-29.6
Ferrosilite (mol%):26.9-28.5; 31.6
Wollastonite (mol%):10.0-12.7; 29.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWS
Main mass:Aaronson
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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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