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Northwest Africa 13298
Basic information Name: Northwest Africa 13298
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13298
Observed fall: No
Year found: 2020
Country: Morocco
Mass:help 730 g
Meteoritical Bulletin:  MB 109  (2020)  LL3
Recommended:  LL3    [explanation]

This is 1 of 487 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 2 May 2020
Writeup from MB 109:

Northwest Africa 13298 (NWA 13298)


Purchased: 2020

Classification: Ordinary chondrite (LL3)

History: Fabien Kuntz purchased the 730 g sample in Errachidia, Morocco, from a meteorite prospector in 2020.

Physical characteristics: Sample is brownish-yellow in color, has a rounded, irregular shape and displays a heavily sand-blasted interior which shows chondrules up to cm in size. Abundant chondrules and clasts are visible on the cut face showing the interior of the sample.

Petrography: Description and classification (A. Love, App) Sample is a breccia composed of unequilibrated type 3 clasts in a host type 3 material. Host is composed of distinct, close-packed 805µm (avg. dia.) chondrules in opaque matrix. Chondrules with isotropic glass are present, but devitrified mesostasis is dominant. Clasts contain unequilibrated chondrules set in a transparent and brecciated matrix.

Geochemistry: (A. Love, App) Host: Olivine (Fa16.8±11.9 (Fa0.7-38.7), Fe/Mn=50.3±22.2, n=11. Mean Cr2O3 in type II 0.08 Wt% and sigma of 0.05, n=9); low Ca-pyroxene (Fs16.2±13.6Wo1.0±0.6 (Fs2.1-28.9Wo0.3-2.0), n=10). Clast A: olivine (Fa14.5±5.2, n=4); low Ca pyroxene (Fs15.2Wo1.3, n=1). Clast B: Olivine (Fa10.8±4.9, n=2); low Ca pyroxene (Fs17.9±0.7Wo0.5+/-0.1, n=2).

Classification: Ordinary chondrite (LL3, C-S3, W2) Based on texture, chondrule size and magnetic susceptibility this sample is an LL chondrite breccia. Estimated subtype for this sample is 3.5 based on unequilibrated compositions, presence of isotropic glass mesostasis (3.4-3.5), lack of yellow CL in chondrule mesostasis (>3.4) and presence of red luminescence in chondrule olivine >3.5). Clasts A & B are type 3 (>3.5) based on unequilibrated olivine compositions and CL signatures.

Specimens: Fabien Kuntz holds the main mass. A thick slice and several smaller slices and fragments comprise the 36.43g type specimen. A polished thin section and mount are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Errachidia, Morocco
Date:P 2020
Mass (g):730
Shock stage:C-S3
Weathering grade:W2
Fayalite (mol%):16.8±11.9; 14.5±5.2; 10.8±4.9
Ferrosilite (mol%):16.2±13.6; 15.2; 17.9±0.7
Wollastonite (mol%):1.0±0.6; 1.3; 0.5±0.1
Magnetic suscept.:3.46
Classifier:A. Love, App
Type spec mass (g):36.43
Type spec location:App
Main mass:Fabien Kuntz
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)
Kuntz: Fabien Kuntz, France; Website (private address)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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