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Northwest Africa 15342
Basic information Name: Northwest Africa 15342
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15342
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 4.39 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  L5
Recommended:  L5    [explanation]

This is 1 of 8890 approved meteorites (plus 5 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 1 Oct 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15342 (NWA 15342)

(Northwest Africa)

Purchased: 2022 Jan

Classification: Ordinary chondrite (L5)

History: Purchased by Kenneth Alvarez Castillo in January 2022 from a dealer in New Jersey, who had obtained the specimen in 2010 from a Moroccan source.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Sparse glass-free chondrules are set in a recrystallized matrix containing altered kamacite, taenite, augite, plagioclase, troilite, chromite and chlorapatite. Some small pockets and veinlets of opaque shock melt are present, as well as some veinlets of secondary Fe oxides.

Geochemistry: Olivine (Fa25.3±0.8, range Fa24.7-26.8, N = 6), low-Ca pyroxene (Fs21.1±0.4Wo1.4±0.2, range Fs20.8-21.7Wo1.2-1.7, N = 4), augite (Fs8.4±0.1Wo44.1±0.3, range Fs8.3-8.4Wo43.8-44.3, N = 2).

Classification: Ordinary chondrite (L5).

Specimens: 42 g including one polished thin section at UWB; remainder with Mr. K. Castillo

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:New Jersey
Date:P 2022 Jan
Mass (g):4388
Pieces:1
Class:L5
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.3±0.8
Ferrosilite (mol%):21.1±0.4
Wollastonite (mol%):1.4±0.2
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):42
Type spec location:UWB
Main mass:K. Castillo
Comments:Work name JH22-5; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Kenneth Alvarez Castillo   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
  This lists important revisions made to data for this record.

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