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Northwest Africa 14369
Basic information Name: Northwest Africa 14369
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14369
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 247 g
Classification
  history:
Recommended:  Martian (nakhlite)    [explanation]

This is 1 of 29 approved meteorites classified as Martian (nakhlite).   [show all]
Search for other: Martian meteorites
Comments: Approved 20 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14369 (NWA 14369)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Martian meteorite (Nakhlite)

History: Purchased by Darryl Pitt in March 2021 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Cumulate texture. Composed predominantly of euhedral to subhedral prismatic grains of zoned augite (up to 3 mm long) and large (up to 4.5 mm) anhedral grains of zoned olivine together with smaller grains of titanomagnetite (containing pervasive fine ilmenite exsolution lamellae). Augite grains exhibit both simple growth twins and polysynthetic shock twinning; olivine grains contain inclusions of augite and are crosscut by veinlets of orange-brown "iddingsitic" material. Intercumulus phases are sodic plagioclase (birefringent oligoclase), silica polymorph, K-feldspar, ilmenite, chlorapatite and rare baddeleyite and pyrrhotite, plus orange-brown "iddingsitic" material.

Geochemistry: Olivine (cores Fa61.2-64.3, N = 3; rims Fa81.5-84.9, N = 3; FeO/MnO = 42-48), augite (cores Fs23.1-24.5Wo40.6-39.6, N = 3; rims Fs42.9-45.1Wo38.7-40.6, N = 3; FeO/MnO = 32-38), augite inclusions in olivine (Fs23.8-27.1Wo40.0-42.9, FeO/MnO = 32-34, N = 2), sodic plagioclase (An20.7-25.2Or3.9-4.3, N = 2), K-feldspar (Or64.0Ab34.9An1.1).

Classification: Nakhlite.

Specimens: 20.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Mar
Mass (g):247
Pieces:1
Class:Martian (nakhlite)
Shock stage:low
Weathering grade:low
Fayalite (mol%):61.2-84.9
Ferrosilite (mol%):23.1-45.1
Wollastonite (mol%):38.7-42.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.4
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 619; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8636 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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