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Northwest Africa 15354
Basic information Name: Northwest Africa 15354
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15354
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1615 g
Meteoritical Bulletin:  MB 112  (2024)  R4-5
Recommended:  R4-5    [explanation]

This is 1 of 6 approved meteorites classified as R4-5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 19 Mar 2023
Writeup from MB 112:

Northwest Africa 15354 (NWA 15354)

(Northwest Africa)

Purchased: 2021

Classification: Rumuruti chondrite (R4-5)

History: Purchased in 2021 by Chris Monk from Yunes Chaoui.

Physical characteristics: Many small stones with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a brecciated chondrite composed of chondrules and sub-rounded to sub-angular mm and cm-sized clasts (primarily olivine-rich) set within a fine-grained matrix containing accessory pentlandite. Some clasts contain feldspar ~30 µm and are of petrographic type 5. The groundmass contain devitrified glass and has a petrographic type 4.

Geochemistry: Olivine (Fa39.5±1.2, range Fa37.8-42.4, NiO=0.38±0.19 wt. %, n=38), High-Ca Pyroxene (Fs12.5±0.8Wo43.5±0.3, range Fs12.1-13.9Wo43.1-43.8, n=5). Sodic Plagioclase (An7.2±1.4, range An6.2-8.8, n=3).

Classification: Rumuruti Chondrite (R4-5) genomict breccia.

Specimens: 23.05 g at Cascadia, main mass with Chris Monk.

Data from:
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2021
Mass (g):1615
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):39.5±1.2
Ferrosilite (mol%):12.5±0.8
Wollastonite (mol%):43.5±0.3
Classifier:D. Sheikh, Cascadia
Type spec mass (g):23.05
Type spec location:Cascadia
Main mass:Chris Monk
Comments:CML 1578; 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., 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. ?
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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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