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Northwest Africa 13283
Basic information Name: Northwest Africa 13283
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13283
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 201 g
Recommended:  Lunar    [explanation]

This is 1 of 103 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 1 Nov 2020
Writeup from MB 109:

Northwest Africa 13283 (NWA 13283)

(Northwest Africa)

Purchased: 2019

Classification: Lunar meteorite

History: In July 2019, Marc Jost purchased 8 fragments totaling 200.6 g from Aziz Mouadine in Rissani, Morocco.

Physical characteristics: Samples are angular in shape and are coated with a yellowish orange layer of caliche that covers the exterior. The samples have a dark-colored exterior with white-grey, angular clasts. The interior shows light colored brecciated clasts in a dark-colored, micro-vesicular matrix.

Petrography: Sample is a clast-supported breccia composed of: mm-cm-sized, angular micro-gabbroic and rare basaltic lithic fragments; mineral clasts of olivine, exsolved pigeonite, orthopyroxene and anorthite; impact melt breccias; quenched glassy fragments; and schlieren-textured, micro-vesicular glassy breccias (agglutinates) set within a fine-grained matrix. Additional minerals include: ilmenite, chromite, FeNi fragments and troilite.

Geochemistry: (A. Love, App) Olivine (Fa9.5-53.6, Fe/Mn=72.4-89.2, n=12), low-Ca pyroxene (Fs26.4-54.2Wo2.0-4.7, Fe/Mn=53.0-60.3 n=8), pigeonite (Fs30.5-39.7Wo7.6-18.0), high-Ca pyroxene exsolution lamellae (Fs12.9-27.9Wo36.9-41.4, n=9), plagioclase (An96.4-98.3Or0.0, n=10).

Classification: Lunar (anorthosite regolith breccia). Fe/Mn ratios in and pyroxene and anorthite compositions suggest this is a lunar sample. Textures and mineralogy suggest sample is an anorthositic regolith breccia.

Specimens: Marc Jost (SJS) holds the main masses. A polished thin section and mount and fragment weighing 20.1 g are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Rissani, Morocco
Date:P 2019
Mass (g):200.6
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):9.5-53.6
Ferrosilite (mol%):26.4-54.2; 30.5-39.7; 12.9-27.9
Wollastonite (mol%):2.0-4.7; 7.6-18.0; 36.9-41.4
Magnetic suscept.:2.86
Classifier:Anthony Love
Type spec mass (g):20.1
Type spec location:App
Main mass:Marc Jost (SJS)
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)
SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:

     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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