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Northwest Africa 10459
Basic information Name: Northwest Africa 10459
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10459
Observed fall: No
Year found: 2012
Country: Mauritania
Mass:help 47.4 g
Meteoritical Bulletin:  MB 105  (2016)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 446 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 19 Jan 2016
Writeup from MB 105:

Northwest Africa 10459 (NWA 10459)


Find: 2012 Sep 22

Classification: HED achondrite (Howardite)

History: Three stones with a combined weight of 47.4 g were found in Mauritania in 2012. Larry Taylor acquired the samples from a meteorite prospector in Morocco the same year.

Physical characteristics: The stones are tabular shaped and covered in a desert patina. The brecciated nature is clear in the thin sections of the stones, with white anorthite-rich basaltic clasts and orthopyroxene phenocrysts, set within a matrix of comminuted diogenitic and eucritic mineral fragments.

Petrography: The samples show eucritic and diogenitic clasts in a matix of crushed pyroxene, plagioclase, and glass. Eucritic clasts have diameters as large as 1.5 cm. Troilite and FeNi metal are present in the matrix, and in the eucritic clasts.

Geochemistry: No olivine present. Eucritic clasts: Low-Ca pyx = Fs60.4±2.3Wo3.5±2.7, N=19; High-Ca pyx = Fs28.0±1.8Wo42.1±2.1, N=12. The Fe/Mn value for pyroxenes in the eucritic clasts is 32.5±1.0; plagioclase in the eucritic clasts is An89.0±2.7. Diogenetic clasts: Low-Ca pyx = Fs28.5±6.8Wo3.6±2.0, N=35; High-Ca pyx = Fs28.6±4.2Wo42.0±3.2, N=32.

Classification: Howardite

Specimens: 9.6 g on deposit at SI, the rest of the mass is on deposit at UTenn.

Data from:
  Table 0
  Line 0:
Date:2012 Sep 22
Mass (g):47.4
Shock stage:low
Weathering grade:low
Classifier:L. Taylor, M. Phillips, A. Martin, and C. McCarty, UTenn
Type spec mass (g):9.5
Type spec location:SI
Main mass:UTenn
Finder:Abdellah Alfinis
Comments:Submitted by Michael Phillips
   and collections
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
UTenn: Planetary Geosciences Institute, Department of Earth and Planetary Sciences, University of Tennessee, 1412 Circle Drive, Knoxville, TN 37996-1410, United States (institutional address; updated 1 Nov 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 200 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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