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Northwest Africa 10491
Basic information Name: Northwest Africa 10491
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10491
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 30 g
Meteoritical Bulletin:  MB 105  (2016)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 485 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 3 Feb 2016
Writeup from MB 105:

Northwest Africa 10491 (NWA 10491)

(Northwest Africa)

Purchased: 2015 Aug

Classification: HED achondrite (Diogenite)

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

Physical characteristics: A single broken crusted fragment (30 g).

Petrography: (A. Irving, UWS) Matrix-poor breccia consisting of some larger lithic clasts plus closely-packed interstitial, related mineral debris. Orthopyroxene is the predominant phase accompanied by calcic plagioclase (~5 vol.%), chromite and minor stained metal.

Geochemistry: (P. Carpenter, WUSL) Orthopyroxene (Fs23.6-24.6Wo4.3-3.0, FeO/MnO = 28, N = 2), plagioclase (An85.2-85.5Or0.3-0.4, N = 2)

Classification: Diogenite (breccia, plagioclase-bearing).

Specimens: 6.28 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 Aug
Mass (g):30
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):23.6-24.6
Wollastonite (mol%):4.3-3.0
Classifier:A. Irving and P. Carpenter, UWS
Type spec mass (g):6.28
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ15-10; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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