Meteoritical Bulletin: Entry for Northwest Africa 6437

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Northwest Africa 6437

Basic information

Name: Northwest Africa 6437
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6437
Observed fall: No
Year found: 2009
Country: Morocco
Mass: 305 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	CO3
Recommended:			CO3 [explanation]

This is 1 of 653 approved meteorites (plus 2 unapproved names) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 19 Jul 2013

Writeup

Writeup from MB 102:

Northwest Africa 6437 (NWA 6437)

Morocco

Found: 2009

Classification: Carbonaceous chondrite (CO3)

Petrography: Desert ablated stone with little fusion crust. Limonitic staining present. Typical CO chondrule size with small AOAs and CAIs. Olivine Fa mean, 21.4±18 (n=23), Fe/Mn=128 to 144, Cr₂O₃, mean = 31.4±15.4 wt % (n=23). Analyses limited to chondrule olivine only. Metal Ni = 5.6 wt %. Subtype of 3.1 likely based on Cr₂O₃ content in olivine (Grossman and Brearley, 2005).

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	2009
Mass (g):	305
Pieces:	2
Class:	CO3
Shock stage:	S2
Weathering grade:	W3
Fayalite (mol%):	21.4±18, n=23
Ferrosilite (mol%):	12.6±9.8, n=23
Wollastonite (mol%):	0.4-1.8
Classifier:	T. Bunch and J. Wittke, NAU
Type spec mass (g):	25.65
Type spec location:	PSF
Main mass:	F. Kuntz
Comments:	Submitted by Wittke

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States (institutional address; updated 12 Apr 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

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Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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