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Northwest Africa 8748
Basic information Name: Northwest Africa 8748
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8748
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 32.4 g
Meteoritical Bulletin:  MB 104  (2015)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 432 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 10 Feb 2015
Writeup from MB 104:

Northwest Africa 8748 (NWA 8748)

(Northwest Africa)

Purchased: 2014 Jul

Classification: HED achondrite (Howardite)

History: Purchased by Darryl Pitt in July 2014 from a dealer in Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental breccia composed predominantly of eucritic crystalline debris (calcic plagioclase, exsolved pigeonite, silica polymorph, ilmenite, troilite, Ni-free metal), some basaltic eucrite clasts and ~15 vol.% diogenitic orthopyroxene grains (containing inclusions of chromite and troilite).

Geochemistry: Diogenitic orthopyroxene (Fs24.6-26.5Wo1.8-3.1, FeO/MnO = 28-33, N = 3), orthopyroxene host (Fs62.9-64.3Wo1.8-1.9, FeO/MnO = 33-35, N = 3), clinopyroxene exsolution lamellae (Fs27.1-28.4Wo43.2-43.3, FeO/MnO = 28-31, N = 3).

Classification: Howardite.

Specimens: 6.6 g including one polished thin section at UWB; the remainder is held by DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2014 Jul
Mass (g):32.4
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):24.6-26.5; 62.9-64.3; 27.1-28.4
Wollastonite (mol%):1.8-3.1; 1.8-1.9; 43.2-43.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):6.6
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC 60; 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)
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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