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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 409 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 1836 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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