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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
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  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
Writeuphelp
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:
  MB112
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P 2021
Mass (g):1615
Pieces:many
Class:R4-5
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
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 Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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