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Northwest Africa 16369
Basic information Name: Northwest Africa 16369
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16369
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 412 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  L5
Recommended:  L5    [explanation]

This is 1 of 8963 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 3 Jan 2024
Writeuphelp
Writeup from MB 112:

Northwest Africa 16369 (NWA 16369)

(Northwest Africa)

Purchased: 2023

Classification: Ordinary chondrite (L5)

History: Acquired by Daniel Sheikh in 2022 from a meteorite dealer in Morocco; later purchased in 2023 by Michael Kelly.

Physical characteristics: Single stone, approximately 90% covered with black fusion crust with thin contraction cracks. Remaining areas are naturally broken corners and small windows, some of which have secondary fusion crust. Freshly broken corners expose numerous dark gray chondrules in a light gray matrix. No visible shock veins observed on the exterior surface nor cut face.

Petrography: (M. Kelly, Palladium Astromaterials; D. Sheikh, Cascadia) Sample represents an equilibrated ordinary chondrite displaying a texture consistent with type 5 as it contains secondary recrystallized feldspar (~25 μm). It shows a moderate amount of shock with observable planar fractures in olivine. Accessory phases identified include Fe-Ni metal, chromite, and troilite. Variable chondrule textural types were identified, including PO, PP, POP, and BO (some chondrules display observable coarse igneous rims).

Geochemistry: (D. Sheikh, Cascadia) Olivine (Fa25.6±0.2, range Fa25.1-26.3, n=24); Low-Ca Pyroxene (Fs21.5±0.2Wo2.0±0.2, range Fs21.3-21.9Wo1.6-2.3, n=19).

Classification: Ordinary chondrite (L5).

Specimens: 21 g type specimen at Cascadia, 374.8 g main mass with Michael Kelly.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:online
Date:P 2023
Mass (g):412
Pieces:1
Class:L5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):25.6±0.2
Ferrosilite (mol%):21.5±0.2
Wollastonite (mol%):2.0±0.2
Classifier:D. Sheikh, Cascadia; M. Kelly, Palladium Astromaterials
Type spec mass (g):21
Type spec location:Cascadia
Main mass:Michael Kelly
Comments:CML 1541; submitted by Daniel Sheikh
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)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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