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Northwest Africa 10403
Basic information Name: Northwest Africa 10403
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10403
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 96.2 g
Meteoritical Bulletin:  MB 104  (2015)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 49 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 18 Dec 2015
Writeup from MB 104:

Northwest Africa 10403 (NWA 10403)

(Northwest Africa)

Purchased: 2015 Jun

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Aras Jonikas in June 2015 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed mostly of diogenitic clasts and debris, plus <10 vol.% eucritic debris and lithic clasts (with intersertal to recrystallized tetxtures). Minerals are orthopyroxene (with several different compositions), calcic plagioclase, exsolved pigeonite, silica polymorph, chromite and troilite.

Geochemistry: Diogenitic orthopyroxene (Fs22.4Wo2.1; Fs34.2Wo2.2; FeO/MnO = 34, N = 2), orthopyroxene host (Fs58.3Wo3.8, FeO/MnO = 29), clinopyroxene exsolution lamella (Fs29.2Wo41.5, FeO/MnO = 30), orthopyroxene host (Fs48.5Wo2.2, FeO/MnO = 20), clinopyroxene exsolution lamella (Fs21.8Wo39.6, FeO/MnO = 19).

Classification: Diogenite (polymict breccia)

Specimens: 20.85 g including one polished thin section at PSF; main mass with Mr. A. Jonikas.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 Jun
Mass (g):96.24
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):22.4; 34.2; 58.3; 29.2
Wollastonite (mol%):2.1; 2.2; 3.8; 41.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.85
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ15-8; submitted by A. Irving
   and collections
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)
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 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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