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Northwest Africa 14578
Basic information Name: Northwest Africa 14578
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14578
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 8 g
Classification
  history:
Recommended:  Achondrite-ung    [explanation]

This is 1 of 119 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 12 Feb 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14578 (NWA 14578)

(Northwest Africa)

Purchased: 2021

Classification: Ungrouped achondrite

History: Purchased by Mark Lyon from a meteorite dealer and now owned by Frank Thompson and Kasper Dahl Finderup.

Physical characteristics: Saw-cut slice surface reveals a polycrystalline aggregate of light green, dark gray and white grains up to 1 mm in size.

Petrography: (A. Ross and C. Agee, UNM) Microprobe analysis and reflected light microscopy of a polished mount shows a texturally and compositionally equilibrated mosaic of major mineral phases diopside, forsterite, and plagioclase. Minor phases, Cr-troilite and Fe-metal (low-Ni) were also detected. Both forsterite and diopside are chromium-bearing.

Geochemistry: (A. Ross, UNM) Forsterite Fa2.3±0.0, Cr2O3=0.37±0.01, Fe/Mn=26±2, n=2; diopside Fs0.9±0.0Wo45.8±0.1, Cr2O3=0.97±0.01, Fe/Mn=18±8, n=6; plagioclase An88.6±1.1Ab11.2±1.1, n=4.

Classification: Achondrite-ung, very likely paired with NWA 7325.

Specimens: 1.6 g on deposit at UNM. Frank Thompson and Kasper Dahl Finderup hold the main mass

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2021
Mass (g):8
Pieces:1
Class:Achondrite-ung
Shock stage:low
Weathering grade:low
Fayalite (mol%):2.3±0.0
Ferrosilite (mol%):0.9±0.0
Wollastonite (mol%):45.8±0.1
Classifier:C. Agee, UNM
Type spec mass (g):1.6
Type spec location:UNM
Main mass:Frank Thompson and Kasper Dahl Finderup
Comments:Fieldname ML-12; submitted by C. Agee
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)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
FRANK THOMPSON   
Geography: 
Coordinates:Unknown.

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

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