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Northwest Africa 8306
Basic information Name: Northwest Africa 8306
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8306
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 1389 g
Meteoritical Bulletin:  MB 103  (2014)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 288 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Nov 2014
Writeup from MB 103:

Northwest Africa 8306 (NWA 8306)

(Northwest Africa)

Purchased: 2014 Feb

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Darryl Pitt in February 2014 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: Single stone (1389 g) lacking fusion crust and composed of pale gray, pale yellow and white clasts in a very dark gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular clasts in a partly glassy matrix containing trapped microbubbles. Minerals are olivine, pigeonite, fayalite, anorthite, silica (as separate clasts), hedenbergite, Ti-poor chromite, Ti-rich chromite, ilmenite, and minor exsolved pigeonite, baddeleyite, kamacite and barite. One fine grained, quenched-textured basaltic clast was found.

Geochemistry: Olivine (Fa26.5-36.0; FeO/MnO = 102-116, N = 3), pigeonite (Fs19.8-24.0Wo19.9-17.0; FeO/MnO = 47-56; Fs28.8Wo6.5; FeO/MnO = 55), fayalite (Fa72.6; FeO/MnO = 104). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 8.9, Na2O 0.41; (in ppm) Sc 17.1, Ni 230, La 7.3, Sm 3.30, Eu 0.93, Yb 2.30, Lu 0.317, Hf 2.4, Th 1.0.

Classification: Lunar (feldspathic regolithic breccia).

Specimens: A 20.2 g specimen with one polished surface is at UWB. The main mass is held by DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2014 Feb
Mass (g):1389
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):26.5-36.0; 72.6
Ferrosilite (mol%):19.8-24.0
Wollastonite (mol%):19.9-17.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:D. Pitt
Comments:Y01; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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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     This is 1 of 8746 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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