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Northwest Africa 10177
Basic information Name: Northwest Africa 10177
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10177
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 46.6 g
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 391 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 30 Jun 2015
Writeup from MB 104:

Northwest Africa 10177 (NWA 10177)

(Northwest Africa)

Purchased: 2013 Sep

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by John Curchin in September 2013 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental breccia composed mainly of clasts of basaltic to partially granoblastic eucrites plus related debris, and minor amounts of diogenitic orthopyroxene. Other minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, chromite, troilite and Ni-free metal.

Geochemistry: Host orthopyroxene (Fs51.7-52.6Wo3.0-1.5, FeO/MnO = 30-31, N = 2), clinopyroxene exsolution lamellae (Fs24.2-21.1Wo40.2-42.7, FeO/MnO = 30-32, N = 2), diogenitic orthopyroxene (Fs18.1Wo1.2; Fs25.0Wo2.7; FeO/MnO = 25-35), olivine (Fa74.6, FeO/MnO = 43).

Classification: Eucrite (polymict breccia).

Specimens: 9.7 g including one polished thin section at UWB. The remainder is held by Mr. J. Curchin.

Data from:
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2013 Sep
Mass (g):46.6
Shock stage:low
Weathering grade:low
Fayalite (mol%):74.6
Ferrosilite (mol%):18.1; 25.0; 51.7; 24.2; 52.6; 21.1
Wollastonite (mol%):1.2; 2.7; 3.0; 40.2; 1.5; 42.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):9.7
Type spec location:UWB
Main mass:J. Curchin
Comments:JC15-1; 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)
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 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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