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Northwest Africa 13390
Basic information Name: Northwest Africa 13390
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13390
Observed fall: No
Year found: 2017
Country: Mauritania
Mass:help 113 g
Classification
  history:
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 4 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Oct 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13390 (NWA 13390)

Mauritania

Purchased: 2017 Apr 13

Classification: Lunar meteorite (frag. breccia)

History: Purchased April 13, 2017, by Dustin Dickens from a nomad in Mauritania.

Physical characteristics: A single stone with no fusion crust. Cut surface reveals a fragmental breccia set in a dark-gray ground mass.

Petrography: (D. Dickens) This meteorite is a clast-rich polymict breccia with lithic fragments embedded in a fine-grained moderately vesiculated groundmass. Fragmental clasts sizes range from <0.1-6 mm and are primarily basaltic. Kamacite and ilmenite are present. This meteorite is shocked with some impact melt textures present.

Geochemistry: (C. Agee, UNM; D. Dickens) Olivine Fa28.5±5.68, Fe/Mn=98±6, n=14; pigeonite Fs35.8±11.6Wo8.0±5.1, Fe/Mn=60±6, n=10; high-Ca pyroxene Fs25.0±3.3Wo30.9±8.6, Fe/Mn=57±8 n=3; plagioclase An96.3±3.0Ab4.7±2.6Or0.3±0.4, n=7; shock melt (20 µm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.8±1.0, Al2O3=26.0±2.9, CaO=15.3±1.2, MgO=5.6±1.2, FeO=4.5±0.3, TiO2=0.39±0.09, Cr2O3=0.11±0.02, MnO=0.07±0.02, Na2O=0.42±0.04, K2O=0.17±0.14 (all wt%), Fe/Mn=61±2, n=4, Mg#=55.4.

Classification: Lunar Fragmental Breccia

Specimens: 20 g including a probe mount on deposit at UNM, Oliver Dickens holds the main mass.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Nouakchott, Mauritania
Date:P 2017 Apr 13
Mass (g):113
Pieces:1
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):28.5±5.7
Ferrosilite (mol%):33.3±10.8,25.0±3.3
Wollastonite (mol%):13.3±11.5,30.9±8.6
Classifier:D. Dickens
Type spec mass (g):20
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Submitted by Dustin Dickens
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Dustin Dickens      
Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 127 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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