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Northwest Africa 10402
Basic information Name: Northwest Africa 10402
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10402
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 48.7 g
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Dec 2015
Writeup from MB 104:

Northwest Africa 10402 (NWA 10402)

(Northwest Africa)

Purchased: 2015 Jun

Classification: HED achondrite (Eucrite, brecciated)

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

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed mostly of crystal debris plus some intact eucrite clasts (with intersertal and fine-grained, quench textures). Exsolved pigeonite in all components has the same optical properties; other minerals are calcic plagioclase, fayalite, silica polymorph, ilmenite and troilite, plus rare ferroan orthopyroxene, ferropigeonite and Ni-free metal.

Geochemistry: Olivine (Fa77.2; Fa89.0; FeO/MnO = 43-44, N = 2), low-Ca pyroxene host (Fs57.8Wo6.7, FeO/MnO = 30), clinopyroxene exsolution lamella (Fs30.5Wo39.5, FeO/MnO = 31), discrete orthopyroxene (Fs39.0Wo3.1, FeO/MnO = 31), ferropigeonite (Fs77.1Wo15.8, FeO/MnO = 30).

Classification: Eucrite (genomict breccia).

Specimens: 9.9 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):48.66
Shock stage:low
Weathering grade:low
Fayalite (mol%):77.2; 89.0
Ferrosilite (mol%):57.8; 30.5; 39.0; 77.1
Wollastonite (mol%):6.7; 39.5; 3.1; 15.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):9.9
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ15-7; 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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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