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Northwest Africa 13281
Basic information Name: Northwest Africa 13281
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13281
Observed fall: No
Year found: 2019
Country: Niger
Mass:help 50 kg
Classification
  history:
Recommended:  L5    [explanation]

This is 1 of 6726 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 21 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13281 (NWA 13281)

Niger

Find: 2019

Classification: Ordinary chondrite (L5)

History: Found by nomads in Niger in 2019. Later purchased by Jesper Gronne from a Moroccan dealer in October 2019.

Physical characteristics: Sample contains a dark-brown fusion crust.

Petrography: (D. Sheikh, FSU) Sample is an equilibrated ordinary chondrite with blurred chondrule boundaries (Av. 750±50µm, n=7) and contains olivine, orthopyroxene, kamacite, taenite, troilite, chromite, merrillite, chlorapatite, iron oxides, and secondary recrystallized plagioclase (20±10µm).

Geochemistry: Olivine (Fa22.8±0.3, range Fa22.2-23.2, n=30), Orthopyroxene (Fs19.5±0.3Wo1.3±0.2, range Fs19.1-20.1Wo1.0-1.6, n=30).

Classification: Ordinary Chondrite (L5) based on Fa and Fs homogeneity, secondary recrystallized plagioclase grain size, and magnetic susceptibility.

Specimens: 55.73 grams at UCLA; main mass with Jesper Gronne.

Data from:
  MB109
  Table 0
  Line 0:
Date:2019
Mass (g):50000
Pieces:200
Class:L5
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):22.8±0.3 (N=30)
Ferrosilite (mol%):19.5±0.3 (N=30)
Wollastonite (mol%):1.3±0.2 (N=30)
Magnetic suscept.:4.91
Classifier:D. Sheikh, FSU
Type spec mass (g):55.73
Type spec location:UCLA
Main mass:Jesper Gronne
Comments:Submitted by Daniel Sheikh
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography:

Niger
Coordinates:Unknown.

Statistics:
     This is 1 of 69 approved meteorites from Niger (plus 4 unapproved names)

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