Meteoritical Bulletin: Entry for Northwest Africa 8357

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Northwest Africa 8357

Basic information

Name: Northwest Africa 8357
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8357
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 304 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	L3
Recommended:			L3 [explanation]

This is 1 of 718 approved meteorites (plus 1 unapproved name) classified as L3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 29 Jan 2015

Writeup

Writeup from MB 104:

Northwest Africa 8357 (NWA 8357)

(Northwest Africa)

Purchased: 2014 Feb

Classification: Ordinary chondrite (L3)

History: Purchased by Matthew Martin in February 2014 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, spheroidal chondrules (1.5±0.8 mm) together with some angular, recrystallized clasts are set in a finer grained matrix.

Geochemistry: Olivine, Fa_3.2-34.1; Cr₂O₃ in ferroan olivine = 0.03-0.08 wt.%, mean 0.05±0.02 wt.%, N = 7; orthopyroxene, Fs_1.6-20.8Wo_0.6-2.0, N = 3; subcalcic augite, Fs_4.1Wo_16.4; augite,Fs_8.0-8.2Wo_45.9-46.3.

Classification: Ordinary chondrite (L3).

Specimens: 21 g including one polished thin section at UWB. The remainder is held by Mr. M. Martin.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2014 Feb
Mass (g):	304
Pieces:	1
Class:	L3
Shock stage:	S2
Weathering grade:	W1/2
Fayalite (mol%):	3.2-34.1
Ferrosilite (mol%):	1.6-20.8
Wollastonite (mol%):	0.6-2.0
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21
Type spec location:	UWB
Main mass:	M. Martin
Comments:	MM14-2; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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