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Northwest Africa 15353
Basic information Name: Northwest Africa 15353
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15353
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 674 g
Meteoritical Bulletin:  MB 111  (2023)  CO3.1
Recommended:  CO3.1    [explanation]

This is 1 of 16 approved meteorites classified as CO3.1.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 12 Nov 2022
Writeup from MB 111:

Northwest Africa 15353 (NWA 15353)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CO3.1)

History: Stone acquired by Cascadia in 2021 from a meteorite dealer in northwest Africa. 149 g of the stone later acquired from Cascadia by Daniel Sheikh in a trade.

Physical characteristics: Single stone with dark-brown fusion crust sliced into two pieces.

Petrography: (D. Sheikh, Cascadia) Sample is comprised of small chondrules (Av. diameter ~130 μm, ~60 vol. %), isolated mineral fragments, and CAIs set in a primarily opaque matrix (~40 vol. %).

Geochemistry: Olivine (Fa19.3±17.6, range Fa0.9-48.9, Fe/Mn=56±32, n=35), Cr2O3 in ferroan olivine (Cr2O3 wt. %=0.24±0.12, n=30), Low-Ca Pyroxene (Fs3.0±2.0Wo1.8±1.2, range Fs1.4-7.9Wo0.2-4.8, n=20).

Classification: Carbonaceous chondrite (CO3.1). Cr2O3 content of ferroan olivines suggest a low petrologic subtype that is approximately midway between Rainbow (CO3.2) and Colony (CO3.0) as reported in Grossman and Brearley (2005).

Specimens: 523 g at Cascadia, 149 g with Daniel Sheikh, main mass with Cascadia.

  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2021
Mass (g):674
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):19.3±17.6
Ferrosilite (mol%):3.0±2.0
Wollastonite (mol%):1.8±1.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):523
Type spec location:Cascadia
Main mass:Cascadia
Comments:CML 1398; submitted by Daniel Sheikh
   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)
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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     This is 1 of 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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