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Northwest Africa 13452
Basic information Name: Northwest Africa 13452
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13452
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 440 g
Classification
  history:
Recommended:  R4-6    [explanation]

This is 1 of 2 approved meteorites classified as R4-6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 1 Nov 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13452 (NWA 13452)

(Northwest Africa)

Purchased: 2019

Classification: Rumuruti chondrite (R4-6)

History: A batch of 26 identical-appearing stones was purchased by Nicholas Gessler in 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fresh specimen composed predominantly of separated, well-formed equilibrated chondrules plus sparse Type 6 lithic clasts set in a fine grained matrix (~40%, black in thin section) containing Ti chromite and pentlandite. A few chondrules in the studied thin section contain olivine with more magnesian cores and more ferroan rims. Metal is absent.

Geochemistry: Olivine in chondrules (Fa39.0-39.4, range Fa39.3±0.2, N = 3), olivine core in chondrule (Fa12.9), olivine rim in chondrule (Fa42.9), olivine in Type 6 clast (Fa39.3), low-Ca pyroxene (Fs30.8±0.3Wo1.4±0.3, rangeFs30.5-31.0Wo1.2-1.7, N = 3), augite (Fs11.5±0.1Wo45.7±0.1, range Fs11.4-11.5Wo45.6-45.7, N = 2), plagioclase (An81.2An12.3Or6.4).

Classification: R4-6 chondrite breccia.

Specimens: 21.8 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):440
Pieces:26
Class:R4-6
Shock stage:S2
Weathering grade:low
Fayalite (mol%):39.3±0.2
Ferrosilite (mol%):30.8±0.3
Wollastonite (mol%):1.4±0.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.8
Type spec location:UWB
Main mass:N. Gessler
Comments:Work name K; 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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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