MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 2 Oct 2023
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
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 300 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 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
Find references in NASA ADS:
Find references in Google Scholar:

     This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

Direct link to this page