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Northwest Africa 10756
Basic information Name: Northwest Africa 10756
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10756
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 125 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 123 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 13 Aug 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10756 (NWA 10756)

(Northwest Africa)

Purchased: 2015 Sep

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Eric Twelker in September 2015 from a Moroccan dealer at the Denver Show.

Physical characteristics: A single stone (125 g) lacking fusion crust and consisting of beige, white and red-brown stained clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of shocked gabbroic clasts and related crystalline debris, plus sparse devitrified glass clasts in a finer matrix containing vesicular glass. Minerals are olivine, pigeonite, exsolved pigeonite, augite, anorthite, Ti-poor chromite, Ti-rich chromite and ilmenite. Minor secondary calcite veinlets and barite are present.

Geochemistry: Olivine (Fa19.1-41.9, FeO/MnO = 69-78, N = 4), pigeonite (Fs41.0Wo5.2, FeO/MnO = 51), augite (Fs9.8Wo42.8, FeO/MnO = 36), low-Ca pyroxene host (Fs56.7Wo5.6, FeO/MnO = 56), clinopyroxene exsolution lamella (Fs30.2Wo39.1, FeO/MnO = 52), anorthite (An96.8Or0.2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.5 g including one polished thin section at UWB; remainder with Twelker.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2015 Sep
Mass (g):125
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):19.1-41.9
Ferrosilite (mol%):56.7; 30.2; 41.0; 9.8
Wollastonite (mol%):5.6; 39.1; 5.2; 42.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.5
Type spec location:UWB
Main mass:E. Twelker
Comments:ET16-2; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, in preparation (2016)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5851 approved meteorites from (Northwest Africa) (plus 2066 unapproved names)

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