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Northwest Africa 13328
Basic information Name: Northwest Africa 13328
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13328
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 650 g
Classification
  history:
Recommended:  LL4-5 melt breccia    [explanation]

This is the only approved meteorite classified as LL4-5 melt breccia.
Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 4 Jul 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13328 (NWA 13328)

(Northwest Africa)

Purchased: 2020 Jan

Classification: LL4-5 melt breccia

History: Purchased by Mark Lyon in January 2020 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of equilibrated lithic clasts (type 4 and type 5) containing relatively sparse but well-formed chondrules set within an opaque matrix containing indistinct chondrule remnants, chromite, chlorapatite and dispersed very fine grained, blebby metal (kamacite+taenite) and troilite.

Geochemistry: Olivine (Fa29.2±0.8, range Fa28.4-30.6, N = 6), low-Ca pyroxene (Fs23.8±0.8Wo1.6±0.4, range Fs23.0-25.2Wo1.2-2.1, N = 5), augite (Fs10.5Wo40.7).

Classification: Ordinary chondrite (LL4-5-melt breccia).

Specimens: 34.1 g including one polished thin section at UWB; remainder with Mr. M. Lyon.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020 Jan
Mass (g):650
Pieces:1
Class:LL4-5 melt breccia
Shock stage:S2 clast
Weathering grade:W1
Fayalite (mol%):29.2±0.8
Ferrosilite (mol%):23.8±0.8
Wollastonite (mol%):1.6±0.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):34.1
Type spec location:UWB
Main mass:M. Lyon
Comments:Work name Lyon20-2; 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)
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 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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