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Northwest Africa 10291
Basic information Name: Northwest Africa 10291
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10291
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 10 g
Meteoritical Bulletin:  MB 104  (2015)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 3 Oct 2015
Writeup from MB 104:

Northwest Africa 10291 (NWA 10291)

(Northwest Africa)

Purchased: 2015 May

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Fabien Kuntz in May 2015 from a dealer in Erfoud, Morocco.

Physical characteristics: No fusion crust is present on these three small very similar stones. The interior of each one consists of sparse white to beige clasts in a dark gray matrix containing vesicles.

Petrography: (A. Irving and S. Kuehner, UWS) Mineral fragments of plagioclase, olivine, orthopyroxene, pigeonite (some exsolved), augite, fayalite, silica polymorph, ilmenite, Ti-chromite and troilite, plus rare intersertal basalt clasts, are set in a finer grained vesicular matrix.

Geochemistry: Olivine (Fa30.1-33.7, FeO/MnO = 87-90, N = 3), orthopyroxene (Fs29.2Wo3.6, FeO/MnO = 59), pigeonite (Fs26.4Wo10.3, FeO/MnO = 61), augite (Fs17.9-52.1Wo38.0-40.0, FeO/MnO = 43-75, N = 2), clinopyroxene host (Fs26.9Wo35.8, FeO/MnO = 49), low-Ca pyroxene exsolution lamellae (Fs44.0Wo6.5, FeO/MnO = 63), fayalite (Fa71.0, FeO/MnO = 100), plagioclase (An93.6Or0.1; An61.5Or2.0).

Classification: Lunar (feldspathic regolithic breccia).

Specimens: 2.52 g including a polished slice at PSF; remainder with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2015 May
Mass (g):10.01
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):30.1-33.7; 71.0
Ferrosilite (mol%):29.2; 26.4; 17.9-52.1
Wollastonite (mol%):3.6; 10.3; 38.0-40.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):2.52
Type spec location:PSF
Main mass:F. Kuntz
Comments:K253; 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)
Kuntz: Fabien Kuntz, France; 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
Find references in NASA ADS:
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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