Meteoritical Bulletin: Entry for Northwest Africa 13103

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Northwest Africa 13103

Basic information

Name: Northwest Africa 13103
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13103
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 30 kg

Classification
history:

Recommended:

L6-melt breccia [explanation]

This is 1 of 70 approved meteorites classified as L6-melt breccia. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 9 Feb 2020

Writeup

Writeup from MB 109:

Northwest Africa 13103 (NWA 13103)

(Northwest Africa)

Purchased: 2018 Mar

Classification: Ordinary chondrite (L6, melt breccia)

History: Purchased in Agadir, Morocco by Aziz Habibi in March 2018.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Sparse Type 6 clasts containing rare chondrule remnants occur within a dominant very fine grained lithology composed of melt-textured material containing clusters of rounded opaque minerals. The specimen is crosscut by subparallel veinlets of iron hydroxides from terrestrial weathering of primary metal.

Geochemistry: Type 6 clast: Olivine (Fa_24.7), low-Ca pyroxene (Fs_20.6Wo_1.4). Melt matrix: Olivine (Fa_24.3±0.2(range Fa_24.1-24.5, N = 3), low-Ca pyroxene (Fs_20.6±0.2Wo_1.4±0.3(range Fs_20.3-20.8Wo_1.1-1.7, N = 4).

Classification: Ordinary chondrite (L6-melt breccia).

Specimens: 221 g including one polished thin section at UWB; remainder with Mr. A. Habibi.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Agadir
Date:	P 2018 Mar
Mass (g):	30000
Pieces:	many
Class:	L6-melt breccia
Shock stage:	S2 (clas
Weathering grade:	W2
Fayalite (mol%):	24.4±0.3
Ferrosilite (mol%):	20.6±0.2
Wollastonite (mol%):	1.4±0.2
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	221
Type spec location:	UWB
Main mass:	A. Habibi
Comments:	Work name AH 724; 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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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