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Northwest Africa 14403
Basic information Name: Northwest Africa 14403
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14403
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 3 kg
Classification
  history:
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 31 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14403 (NWA 14403)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Matthew Stream from Ali Hnini and Mostafa Hnini in June 2021.

Physical characteristics: Thirty similar appearing fusion crusted individuals. Brecciated texture is visible on the exterior with dark and light colored clasts.

Petrography: (C. Agee and A. Ross, UNM) Reflected light microscopy and electron microprobe imaging shows that this meteorite is a fragmental breccia of basaltic eucrite with subophitic texture with ~60% pyroxene and ~35% plagioclase. Pyroxenes show exsolution lamellae and have a compositional continuum between low-Ca pyroxene and augite. Accessory phases are silica, ilmenite, troilite, chromite, and zircon.

Geochemistry: (A. Ross, UNM) Pyroxene Fs50.9±14.2Wo19.2±16.0, Fe/Mn=32±1, n=12; plagioclase An87.3±1.9, n=6.

Classification: Achondrite (monomict eucrite)

Specimens: 26.11 g on deposit at UNM, Matthew Stream holds the main mass.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):3000
Pieces:30
Class:Eucrite-mmict
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):50.9±14.2
Wollastonite (mol%):19.2±16.0
Classifier:C. Agee, UNM
Type spec mass (g):26.11
Type spec location:UNM
Main mass:Matthew Stream
Comments:Field name MST-8; submitted by C. Agee, UNM
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
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
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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