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Northwest Africa 14485
Basic information Name: Northwest Africa 14485
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14485
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 282 g
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 284 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 15 Dec 2021
Writeup from MB 110:

Northwest Africa 14485 (NWA 14485)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Martian meteorite (Shergottite)

History: Purchased by Eric Twelker in March 2021 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Microgabbroic texture. Composed predominantly of zoned clinopyroxene and maskelynite with accessory ulvöspinel, ilmenite, pyrrhotite, merrillite, Ti-poor magnetite, silica polymorph and K-Na-bearing glass. Small pockets of multicolored vesicular shock glass (ranging in color within individual pockets from opaque to red-brown to pale tan with fluidal texture) are present.

Geochemistry: Pigeonite (Fs31.9-61.2Wo12.4-15.8, FeO/MnO = 29-36, N = 5), subcalcic augite (Fs21.2-23.5Wo34.9031.0, FeO/MnO = 26-30, N = 4), ferroan subcalcic augite (Fs51.1Wo23.8), maskelynite (An44.3-54.6Or2.0-1.2, N = 4).

Classification: Shergottite (microgabbroic).

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

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2021 Mar
Mass (g):282
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):31.9-61.2; 21.2-23.5
Wollastonite (mol%):12.4-14.4; 31.0-34.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.4
Type spec location:UWB
Main mass:E. Twelker
Comments:Work name ET21-4; submitted by A. Irving
   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)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8636 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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