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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:
Recommended:  Lunar (frag. breccia)    [explanation]

This is 1 of 26 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, CUB) 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, CUB) 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 CUB, 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, CUB
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)
CUB: Daniel Ozdín, Mineralogical Museum of Comenius University, Faculty of Natural Sciences, Ilkovicova 6, 842 15 Bratislava, Slovakia (institutional address; updated 2 Dec 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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