Meteoritical Bulletin: Entry for Northwest Africa 6446

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Northwest Africa 6446

Basic information

Name: Northwest Africa 6446
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6446
Observed fall: No
Year found: 2010
Country: Morocco
Mass: 156 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	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 10 Apr 2017
Revised 28 Sep 2020: corrected purchase date

Writeup

Writeup from MB 106:

Northwest Africa 6446 (NWA 6446)

Morocco

Find: 2010

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Fabien Kuntz in October 2012 from a dealer in Zagora, Morocco.

Petrography: (T. Bunch and J. Wittke, NAU; A. Irving, UWS) Small chondrules (average apparent diameter ~200 μm) and CAIs in a dark brown matrix.

Geochemistry: Olivine (Fa_0.5-71.0, N = 3), orthopyroxene (Fs_1.3-8.0Wo_1.0-4.8, N = 3), subcalcic ferroaugite (Fs_50.1-52.0Wo_37.6-33.1, N = 2).

Classification: Carbonaceous chondrite (CO3).

Specimens: Type specimen plus one polished thin section at PSF; main mass with Kuntz.

Writeup from MB 109:

NWA 6446: correction

The description in MetBull 106 contained an error. The meteorite was purchased by Fabien Kuntz in 2010.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	2010
Mass (g):	156
Pieces:	1
Class:	CO3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	0.5-71.0
Ferrosilite (mol%):	1.3-8.0
Wollastonite (mol%):	1.0-4.8
Classifier:	T. Bunch, J. Wittke, NAU; A. Irving, S. Kuehner, UWS
Type spec mass (g):	20.3
Type spec location:	PSF
Main mass:	FKuntz
Comments:	work name K152; submitted by A. Irving

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)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Published in Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.

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Photos:

Credit	Photos
Public domain photographs:
Ted Bunch

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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