Meteoritical Bulletin: Entry for Northwest Africa 431

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Northwest Africa 431

Basic information

Name: Northwest Africa 431
This is an OFFICIAL meteorite name.
Abbreviation: NWA 431
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass: 492 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	H6
Recommended:			H6 [explanation]

This is 1 of 6825 approved meteorites (plus 6 unapproved names) classified as H6. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 20 Oct 2018

Writeup

Writeup from MB 107:

Northwest Africa 431 (NWA 431)

(Northwest Africa)

Purchased: 2003

Classification: Ordinary chondrite (H6)

Petrography: Chondrules are recrystallized and poorly defined. Olivine exhibits undulose extinction, but lacks planar fractures. Plagioclase grains are ~50 µm across. There are chromite-plagioclase assemblages and small chromite veinlets present.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2003
Mass (g):	492
Pieces:	1
Class:	H6
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	18.2
Classifier:	A. Rubin, UCLA
Type spec mass (g):	20.51
Type spec location:	UCLA
Main mass:	Nick Gessler
Comments:	Submitted by Simone de Leuw

Institutions
and collections

UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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