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Northwest Africa 10304
Basic information Name: Northwest Africa 10304
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10304
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 40 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 22 Oct 2015
Writeup from MB 104:

Northwest Africa 10304 (NWA 10304)

(Northwest Africa)

Purchased: 2013 Apr

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Darryl Pitt in April 2013 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Composed mainly of debris derived from a gabbroic eucrite lithology (present as sparse lithic clasts) plus minor diogenitic orthopyroxene (associated with olivine). Major minerals are calcic plagioclase (polycrystalline), exsolved pigeonite (some exhibiting red-brown altered cores in thin section), silica polymorph, ilmenite and troilite.

Geochemistry: Diogenitic orthopyroxene (Fs29.6Wo2.3, FeO/MnO = 27), olivine (Fa28.4-34.9, FeO/MnO = 50-51, N = 2), orthopyroxene host (Fs59.3-59.5Wo1.5-1.4, FeO/MnO = 29-30, N = 2), clinopyroxene exsolution lamellae (Fs28.6-28.7Wo41.3-41.5, FeO/MnO = 30-32, N = 2).

Classification: Eucrite (polymict breccia).

Specimens: 8.1 g including one polished thin section at UWB; main mass with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Apr
Mass (g):40
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):28.4-34.9
Ferrosilite (mol%):29.6; 59.3; 28.6; 51.3; 20.1
Wollastonite (mol%):2.3; 1.5; 41.3; 1.7; 44.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):8.1
Type spec location:UWB
Main mass:DPitt
Comments:DP 737; 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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