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Northwest Africa 13519
Basic information Name: Northwest Africa 13519
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13519
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 234 g
Recommended:  L3-5    [explanation]

This is 1 of 21 approved meteorites (plus 1 unapproved name) classified as L3-5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 11 Nov 2020
Writeup from MB 109:

Northwest Africa 13519 (NWA 13519)

(Northwest Africa)

Purchased: 2020

Classification: Ordinary chondrite (L3-5)

History: Purchased by Oz Backman in 2020 at the Tucson Gem and Mineral Show from Mohamed Ismali.

Physical characteristics: Single stone with dark-brown fusion crust.

Petrography: (D. Sheikh, FSU) Sample is an ordinary chondrite genomict breccia containing both equilibrated clasts (type 5) and unequilibrated clasts (type 3) set in a fine-grained matrix. Chondrules (Av. ~700±50 µm); accessory phases include troilite, chromite with Ti, iron oxides, and secondary recrystallized plagioclase (25±5 μm; only found in equilibrated clasts).

Geochemistry: Type 3 olivine (Fa16.9±6.8, range Fa10.0-34.3, n=33), Type 5 olivine (Fa24.5±0.6, range Fa23.5-25.9, n=32), Type 5 low-Ca pyroxene (Fs20.9±0.7 Wo1.7±0.3, range Fs19.4-22.5 Wo0.9-2.0, n=20).

Classification: Ordinary Chondrite (L3-5) Sample is a genomict breccia based on the observation of both type 3 clasts with unequilibrated olivine grains and type 5 clasts with equilibrated olivine and low-ca pyroxene grains.

Specimens: 20.5 grams at UCLA; main mass with Oz Backman.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, AZ
Date:P 2020
Mass (g):234
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):16.9±6.8, 24.5±0.6
Ferrosilite (mol%):20.9±0.7
Wollastonite (mol%):1.7±0.3
Classifier:D. Sheikh, FSU
Type spec mass (g):20.5
Type spec location:UCLA
Main mass:Oz Backman
Comments:Submitted by Daniel Sheikh
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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