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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 288 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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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 1236 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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