Meteoritical Bulletin: Entry for Northwest Africa 8221

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Northwest Africa 8221

Basic information

Name: Northwest Africa 8221
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8221
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 485 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	CK5
Recommended:			CK5 [explanation]

This is 1 of 217 approved meteorites classified as CK5. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 9 Mar 2015

Writeup

Writeup from MB 104:

Northwest Africa 8221 (NWA 8221)

(Northwest Africa)

Purchased: 2013 Nov

Classification: Carbonaceous chondrite (CK5)

History: Purchased by Marcin Cimała and Lukasz Smula in November 2013 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen composed of sparse, separated, medium-sized, granular chondrules (containing abundant magnetite) in a pale brown matrix. Minerals are olivine, clinopyroxene, intermediate plagioclase, Cr-bearing magnetite and pentlandite.

Geochemistry: Olivine (Fa_33.5-34.6; FeO/MnO = 123-142, N = 3), clinopyroxene (Fs_11.1-12.9Wo_43.9-47.4; FeO/MnO = 53-120, N = 3).

Classification: Carbonaceous chondrite (CK5).

Specimens: 22 g including one polished thin section at UWB. The remaining material is held jointly by Mr. M. Cimała, Mr. L. Smula and Ms. M. Skirzewska.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2013 Nov
Mass (g):	485
Pieces:	4
Class:	CK5
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	33.5-34.6
Ferrosilite (mol%):	11.1-12.9
Wollastonite (mol%):	43.9-47.4
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	22
Type spec location:	UWB
Main mass:	M. Cimala, L. Smula and M. Skirzewska
Comments:	51.1; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

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 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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