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Northwest Africa 14758
Basic information Name: Northwest Africa 14758
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14758
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 125.5 g
Classification
  history:
Recommended:  Angrite    [explanation]

This is 1 of 37 approved meteorites classified as Angrite.   [show all]
Search for other: Achondrites, Angrites
Comments: Approved 16 May 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14758 (NWA 14758)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Angrite

History: Purchased by Ziyao Wang in November 2019 from a dealer in Guelmim, Morocoo.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Igneous protogranular aggregate (mean grainsize ~0.7 mm) composed of equant grains of Ca-bearing olivine, Al-rich augite, anorthite, pleonaste and kamacite (some partly altered to Fe hydroxides). The estimated area % mode from pixel counting of elemental X-ray maps is olivine 54.7, augite 27.3, anorthite 11.2, pleonaste 3.8, metal 3.0.

Geochemistry: Olivine (Fa40.3-40.9, FeO/MnO = 82-83, CaO 1.1-1.4 wt.%, N = 4), Al-augite (Fs10.4-10.8Wo54.5-52.1, FeO/MnO = 71-92, Al2O3 5.7-7.9 wt.%, TiO2 0.9-1.6 wt.%, N = 4), anorthite (An99.5-99.7Or0.1-0.0, N = 3).

Classification: Angrite (protogranular).

Specimens: 22.6 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2019 Nov
Mass (g):125.5
Pieces:1
Class:Angrite
Shock stage:low
Weathering grade:low
Fayalite (mol%):40.3-40.9
Ferrosilite (mol%):10.4-10.8
Wollastonite (mol%):54.5-52.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.6
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-77; 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. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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