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Northwest Africa 13203
Basic information Name: Northwest Africa 13203
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13203
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 6.98 kg
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1651 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13203 (NWA 13203)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Ordinary chondrite (L4)

History: Purchased by Darryl Pitt in January 2020 from a Moroccan dealer living in Spain.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed chondrules are set in a relatively coarse-grained, recrystallized matrix containing altered kamacite, taenite, troilite, Ti-chromite, merrillite and chlorapatite.

Geochemistry: Olivine (Fa24.6±0.2, range Fa24.4-24.8, N = 5), low-Ca pyroxene (Fs20.6±0.2Wo1.7±0.3, range Fs20.3-20.9Wo1.5-1.8, N = 5), augite (Fs7.5±0.6Wo45.2±1.0, range Fs6.9-8.0Wo46.3-44.5, N = 3), plagioclase (Ab83.6An10.3Or6.1).

Classification: Ordinary chondrite (L4).

Specimens: 26.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Spain
Date:P 2020 Jan
Mass (g):6976
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):24.6±0.2
Ferrosilite (mol%):20.6±0.2
Wollastonite (mol%):1.7±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):26.4
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 497; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 7377 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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