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Northwest Africa 15368
Basic information Name: Northwest Africa 15368
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15368
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 17.84 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Lunar (frag. breccia)
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 35 approved meteorites classified as Lunar (frag. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15368 (NWA 15368)

(Northwest Africa)

Purchased: January 2021

Classification: Lunar meteorite (frag. breccia)

History: Found in Mali by camel shepherds in January 2021 and subsequently purchased by Ahmed Salek and sold to an anonymous collector in the US.

Physical characteristics: A single stone with a dark exterior, one side partially covered in caliche. Cut surface reveals a fragmental breccia with many lithic clasts set in a glassy dark-gray ground mass.

Petrography: (D. Dickens, NMMS and A. S. Bell, UColo) This meteorite is a clast-rich polymict breccia with subhedral lithic fragments embedded in a fine-grained groundmass. Fragmental clasts sizes range from <0.1 mm to >6 mm and are primarily comprised of plagioclase, low-Ca pyroxene, pigeonite, augite, and olivine. Minor phases include kamacite and ilmenite. This meteorite is shocked with impact melt textures present.

Geochemistry: (D. Dickens, NMMS and A. S. Bell, UColo) olivine Fa38.0±2.6, Fe/Mn=100±11.4, n=8; lo-Ca pyroxene Fs20.7±0.1,Wo4.0±0.1, Fe/Mn=54±2, n=2; pigeonite Fs30.1±5.2,Wo9.5±3.7, Fe/Mn=54±1, n=3; augite Fs16.9±1.1Wo36.5±2.8, Fe/Mn=45±1 n=2; plagioclase An95.9±3.1 Ab2.9±0.7 Or1.2±3.3, n=15;

Classification: Lunar fragmental breccia

Specimens: 40 g with probe mount on deposit at Cascadia, 40 g with probe mount on deposit at UColo, anonymous collector holds the main mass.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Mali
Date:P January 2021
Mass (g):17840
Pieces:1
Class:Lunar (frag. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):38.0±2.6
Ferrosilite (mol%):20.7±0.1, 30.1±5.2, 16.9±1.1
Wollastonite (mol%):4.0±0.1, 9.5±3.7, 36.5±2.8
Classifier:Dustin Dickens, NMMS and Aaron S. Bell, UColo
Type spec mass (g):40
Type spec location:Cascadia
Main mass:Anonymous collector
Comments:Submitted by Dustin Dickens
Institutions
   and collections		 Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
UColo: Geological Sciences University of Colorado Boulder UCB 399 Boulder, CO 80309-0399, United States (institutional address; updated 2 Jul 2024)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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