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Northwest Africa 8682
Basic information Name: Northwest Africa 8682
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8682
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 82 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 183 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 12 Dec 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8682 (NWA 8682)

(Northwest Africa)

Purchased: 2014 Aug

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Steve Arnold in August 2014 from a dealer in Zagora, Morocco.

Physical characteristics: A batch of identical stones (total weight 82 g), each of which is partly coated by pale tan, clayey soil. Interiors consist of small white to beige clasts in gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of a variety of mineral clasts and sparse, small mare basalt clasts in a finer grained, vesicular matrix. Minerals are olivine (including unusually forsteritic grains associated with Cr-pleonaste), orthopyroxene, pigeonite, augite, anorthite, intermediate plagioclase, silica polymorph, fayalite, ilmenite, baddeleyite, troilite, kamacite, merrillite, zirconolite, and minor secondary barite and calcite. One unusual clast consists of K-feldspar + silica polymorph with accessory zirconolite and an unknown Th-Zr-Ti mineral.

Geochemistry: Olivine (Fa6.8, FeO/MnO = 60; Fa27.4-50.3, FeO/MnO = 91-103, N = 4), orthopyroxene (Fs24.5-39.8Wo4.2-4.1, FeO/MnO = 57-69, N = 2), subcalcic augite (Fs16.0-34.4Wo36.4-36.0, FeO/MnO = 45-55, N = 3), fayalite (Fa93.2, FeO/MnO = 79), anorthite (An95.1-96.6Or0.3, N = 2), plagioclase (An49.1Or1.1; An70.7Or1.8).

Classification: Lunar (feldspathic regolithic breccia).

Specimens: 16.4 g including one polished endcut at UWB. The remaining material is held by Mr. S. Arnold.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2014 Aug
Mass (g):82
Pieces:several
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):27.4-50.3; 6.8; 93.2
Ferrosilite (mol%):24.5-39.8; 16.0-34.4
Wollastonite (mol%):4.2-4.1; 36.4-36.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):16.4
Type spec location:UWB
Main mass:S. Arnold
Comments:YAE(14)5; submitted by A. Irving
Institutions
   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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Denis gourgues   
Russ Opdahl               
Wang Ziyao   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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