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Northwest Africa 8181
Basic information Name: Northwest Africa 8181
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8181
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 18.2 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 15 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8181 (NWA 8181)

Morocco

Purchased: 2013 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Fabien Kuntz in June 2013 from a Moroccan dealer at the Ensisheim Show.

Petrography: (A. Irving and S. Kuehner, UWS) Very fine grained breccia composed of small mineral fragments and some very small metal grains irregularly distributed in a partly glassy and vesicular matrix. Minerals are olivine, orthopyroxene, pigeonite, subcalcic augite, anorthite, rutile, kamacite and minor barite.

Geochemistry: Olivine (Fa26.8-27.6; FeO/MnO = 94-99), orthopyroxene (Fs24.0-27.3Wo4.4-2.5; FeO/MnO = 53-60), subcalcic augite (Fs13.4Wo36.0; FeO/MnO = 47), ferropigeonite (Fs58.5Wo7.8; FeO/MnO = 64). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 6.4, Na2O 0.53; (in ppm) Sc10.0, Ni 530, La 16.5, Sm 7.35, Eu 1.54, Yb 4.82, Lu 0.671, Hf 5.6, Th 2.3.

Classification: Lunar (feldspathic vitric fragmental breccia). The distinctive texture and bulk composition of this specimen indicates that it is paired with NWA 4936, NWA 5406 and other stones from the Siksou Mountain area in southern Morocco.

Specimens: A 3.7 g specimen with one polished surface is at UWB. The main mass is held by Kuntz.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P 2013 Jun
Mass (g):18.2
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):26.8-27.6
Ferrosilite (mol%):24.0-27.3
Wollastonite (mol%):4.4-2.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):3.7
Type spec location:UWB
Main mass:F. Kuntz
Comments:K201; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Kuntz: Fabien Kuntz, France; Website (private address)
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)
JGarciaMCM   
steve sutton   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)
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