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Northwest Africa 13754
Basic information Name: Northwest Africa 13754
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13754
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1096 g
Classification
  history:
Recommended:  Lodranite    [explanation]

This is 1 of 86 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 13 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13754 (NWA 13754)

(Northwest Africa)

Purchased: 2020 Dec

Classification: Primitive achondrite (Lodranite)

History: Purchased by Ziyao Wang in December 2020 from a dealer in Zagora, Morocco

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of coarse grained polymineralic clasts (grainsize up to 3 mm, protogranular texture) plus related discrete mineral grains (up to 5 mm) in a finer grained, heavily stained matrix (dark brown in thin section) composed of the same mineral phases. The major minerals are olivine and orthopyroxene (containing blebs and some exsolution lamellae of clinopyroxene); accessory minerals are Ti-free chromite, kamacite (partially altered to iron hydroxides) and troilite. Plagioclase is absent.

Geochemistry: Olivine (Fa10.4-10.8, FeO/MnO = 23-24, N = 4), orthopyroxene (Fs9.2-9.6Wo1.1-1.2, FeO/MnO = 13-14, N = 4), clinopyroxene (Fs3.7-3.9Wo46.3-44.7, N = 3). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave, respectively, δ17O -0.089, 0.084, 0.127; δ18O 2.357, 2.519, 2.392; Δ17O -1.334, -1.246, -1.136 per mil (all data linearized).

Classification: Lodranite (breccia).

Specimens: 54.4 g including one polished thin section at UWB; remainder with Mr. Z. Wang.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2020 Dec
Mass (g):1096
Pieces:1
Class:Lodranite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):10.4-10.8
Ferrosilite (mol%):9.2-9.6; 3.7-3.9
Wollastonite (mol%):1.1-1.2; 46.3-44.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):54.4
Type spec location:UWB
Main mass:Z. Wang
Finder:anonymous
Comments:Work name RC142.1; submitted by A. Irving
Plots: O isotopes:  
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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)
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)
Wang Ziyao                  
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7688 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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