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Northwest Africa 14582
Basic information Name: Northwest Africa 14582
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14582
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1338 g
Classification
  history:
Recommended:  Aubrite    [explanation]

This is 1 of 76 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 29 Jan 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14582 (NWA 14582)

(Northwest Africa)

Purchased: 2021

Classification: Enstatite achondrite (Aubrite)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Eight beige to light grayish fragments with abundant black patchy coatings and veinlets. Some rusty, orange colored spots are exposed at the surfaces.

Petrography: The meteorite is a coarse-grained breccia predominantly composed of up to 1 cm sized enstatite grains with minor diopside inclusions. Opaque phases include Ti-bearing troilite, daubréelite, brezinaite, and rare Ni-Si-poor kamacite. Enstatite shows several sets of planar fractures and strong undulatory extinction. Neither forsterite nor plagioclase have been found in the section studied.

Geochemistry: enstatite: Fs0.05±0.02Wo0.9±0.1 (Fs0.00-0.08Wo0.6-1.0, n=10); diopside: Fs0.2±0.1Wo44.9±0.6 (Fs0.1-0.3Wo44.0-45.7, n=10); troilite (Ti = 1.54±0.11 wt.%, Cr = 0.25±0.02 wt%, N=3); kamacite (Ni = 2.47±0.08 wt%, Si = 0.04±0.02 wt%, N=5)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):1338
Pieces:8
Class:Aubrite
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):0.05; 0.2
Wollastonite (mol%):0.9; 44.9
Classifier:A. Greshake, MNB
Type spec mass (g):22.7
Type spec location:MNB
Main mass:Tomasz Jakubowski and Jarkko Kettunen
Comments:Aubrite; submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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