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Northwest Africa 13454
Basic information Name: Northwest Africa 13454
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13454
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 510 g
Classification
  history:
Recommended:  R3    [explanation]

This is 1 of 39 approved meteorites classified as R3.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 1 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13454 (NWA 13454)

(Northwest Africa)

Purchased: 2019

Classification: Rumuruti chondrite (R3)

History: Two identical stones (302 g, 208 g) were purchased by Nicholas Gessler in 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Separated, well-formed chondrules (some glass-bearing; apparent diameter 550 ± 380 µm, N = 22) plus sparse R3 lithic clasts and rare very small CAI are set in a fine grained matrix containing albitic plagioclase, pentlandite and rare sperrylite. Metal is absent.

Geochemistry: Olivine (Fa33.8±15.1, range Fa2.0-50.3, N = 10), low-Ca pyroxene (Fs21.6±14.9Wo2.3±2.2, range Fs2.3-37.0Wo0.6-5.5, N = 4), pigeonite (Fs30.6Wo9.5), subcalcic augite (Fs10.3Wo33.9).

Classification: R3 chondrite.

Specimens: 21.3 g plus one polished thin section at UWB; remainder with Mr. N. Gessler.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):510
Pieces:2
Class:R3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):33.8±15.1
Ferrosilite (mol%):21.6±14.9
Wollastonite (mol%):2.3±2.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.3
Type spec location:UWB
Main mass:N. Gessler
Comments:Work name Q; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7547 approved meteorites from (Northwest Africa) (plus 1970 unapproved names)

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