Meteoritical Bulletin: Entry for Northwest Africa 13328

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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: 650 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	LL4-5 melt breccia
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

Writeup

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 (Fa_29.2±0.8, range Fa_28.4-30.6, N = 6), low-Ca pyroxene (Fs_23.8±0.8Wo_1.6±0.4, range Fs_23.0-25.2Wo_1.2-2.1, N = 5), augite (Fs_10.5Wo_40.7).

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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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