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Northwest Africa 13676
Basic information Name: Northwest Africa 13676
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13676
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 698 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 236 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 8 Apr 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13676 (NWA 13676)

Algeria

Purchased: 2020 Dec

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Didi Baideri in September 2020 from an Algerian dealer and subsequently sold to Ziyao Wang in December 2020.

Physical characteristics: A single dark, very fine grained stone (698 g) coated by a shiny patina.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fine grained breccia composed of mineral clasts of anorthite, olivine, pigeonite and augite, plus feldspathic lithic clasts (including quench-textured melt clasts), set within a very fine grained, partly vesicular matrix containing kamacitic metal (with variable Fe:Ni) and chromite (with variable Ti content).

Geochemistry: Olivine (Fa26.6-42.8, FeO/MnO = 87-105, N = 6), pigeonite (Fs23.4-35.1Wo6.6-10.2, FeO/MnO = 52-64, N = 5; Fs39.7-47.2Wo14.9-16.7,FeO/MnO = 54-58, N = 2), augite (Fs20.8Wo37.4, FeO/MnO = 56), anorthite (An94.8-95.5Or0.3-0.5, N = 3).

Classification: Lunar (feldspathic breccia).

Specimens: 21.8 g including one polished endcut at UWB; remainder with WangZ.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Laayoune
Date:P 2020 Dec
Mass (g):698
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:low
Fayalite (mol%):26.6-42.8
Ferrosilite (mol%):23.4-35.1; 39.7-47.2; 20.8
Wollastonite (mol%):6.6-10.2; 14.9-16.7; 37.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.8
Type spec location:UWB
Main mass:WangZ
Comments:Work name DB-13; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang               
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1118 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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