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Northwest Africa 5147
Basic information Name: Northwest Africa 5147
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5147
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 968 g
Recommended:  Howardite    [explanation]

This is 1 of 400 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 4 Jul 2020
Writeup from MB 109:

Northwest Africa 5147 (NWA 5147)

(Northwest Africa)

Purchased: 2007

Classification: HED achondrite (Howardite)

History: Purchased by Terry Boswell in 2007 from a Moroccan dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU; T. Bunch and J. Wittke, NAU) Breccia composed of sparse lithic diogenite and eucrite clasts plus related angular mineral fragments in a finer grained matrix. The proportion of diogenitic material is 30-40 vol.%. Minerals include diogenitic orthopyroxene, exsolved pigeonite, unexsolved pigeonite, calcic plagioclase, ferropigeonite, silica polymorph, fayalite, chromite, troilite, ilmenite and Ni-free metal. Lithic eucrite clasts have intersertal, diabasic and microgabbroic textures.

Geochemistry: Diogenitic orthopyroxene (Fs23.6-32.1Wo1.9-3.6, FeO/MnO = 25-31, N = 5), pigeonite (Fs39.3-50.5Wo11.3-21.8, FeO/MnO = 23-31, N = 6), orthopyroxene host (Fs54.8-60.1Wo1.5-4.1, FeO/MnO = 29-31, N = 8), clinopyroxene exsolution lamellae (Fs24.6-24.9Wo42.0-43.8, FeO/MnO = 29-30, N = 2), ferroan orthopyroxene (Fs37.5Wo2.1, FeO/MnO = 30), ferropigeonite (Fs76.3Wo17.5, FeO/MnO = 33), fayalite (Fa75.8, FeO/MnO = 39), plagioclase (An87.7-94.4Or0.4-0.1, N = 8).

Classification: Howardite.

Specimens: 20.9 g including one polished thin section at PSF; remainder with Mr. T. Boswell.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2007
Mass (g):968
Shock stage:low
Weathering grade:low
Fayalite (mol%):75.8
Ferrosilite (mol%):23.6-32.1; 54.8-60.1; 24.6-24.9; 39.3-50.5
Wollastonite (mol%):1.9-3.6; 1.5-4.1; 42.0-43.8; 11.3-21.8
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):20.9
Type spec location:PSF
Main mass:T. Boswell
Comments:Submitted by A. Irving
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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