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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
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 Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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