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Northwest Africa 14547
Basic information Name: Northwest Africa 14547
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14547
Observed fall: No
Year found: 2021
Country: Morocco
Mass:help 84.5 g
Recommended:  LL3    [explanation]

This is 1 of 431 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 22 Dec 2021
Writeup from MB 110:

Northwest Africa 14547 (NWA 14547)


Purchased: 2021

Classification: Ordinary chondrite (LL3)

History: An 84.5 g sample was found prior to 2021 in northwest Africa, and was purchased and donated to App by Steve Arnold in 2020.

Physical characteristics: The stone is irregularly shaped, brown, and displays no fusion crust. Chondrules are visible without a hand lens. Mineralized deposits of calcite are present on the exterior.

Petrography: (G. Margulies, App): The sample has a chondritic texture composed of a host of poorly equilibrated chondrules and a single equilibrated clast. The host contains well-defined chondrules within a partially recrystallized matrix. Poikilitic, porphyritic and barred olivine chondrules have an average diameter of 651 µm (n=119). Rare FeNi and FeS are present throughout the sample. Additional minerals observed include apatite, chromite, calcite, and troilite.

Geochemistry: (G. Margulies, App): Olivine (Fa25.3±3.3, Fe/Mn=48.4±3.8, n=20); low ca pyroxene (Fs 14.5±6.5Wo0.9±1.1, Fe/Mn=26.2±7.4, n=13); pigeonite (Fs14.0-21.6Wo12.6-18.5, Fe/Mn=25.1-25.8, n=2).

Classification: Ordinary chondrite (LL3, C-S2, W5). Poorly equilibrated Fa and Fs and low magnetic susceptibility suggest LL3

Specimens: App holds the 81.95 main mass and a polished thin section.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):84.5
Shock stage:C-S2
Weathering grade:W5
Fayalite (mol%):25.3±3.3
Ferrosilite (mol%):14.5±6.5; 14.0-21.6
Wollastonite (mol%):0.9±1.1; 12.6-18.5
Magnetic suscept.:3.51
Classifier:G. Margulies, App
Type spec mass (g):81.95
Type spec location:App
Main mass:App
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
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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     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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