Meteoritical Bulletin: Entry for Northwest Africa 11322

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Northwest Africa 11322

Basic information

Name: Northwest Africa 11322
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11322
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 130.6 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	CM1/2
Recommended:			CM1/2 [explanation]

This is 1 of 25 approved meteorites classified as CM1/2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 1), CM chondrites, and CM-CO clan chondrites

Comments:

Approved 14 Jul 2017

Writeup

Writeup from MB 106:

Northwest Africa 11322 (NWA 11322)

(Northwest Africa)

Purchased: 2017 Mar

Classification: Carbonaceous chondrite (CM1/2)

History: Purchased by Ben Hoefnagels in March 2017 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Very small serpentinized chondrules (apparent diameter 300±200 μm, N = 12), sparse olivine-bearing chondrules, angular olivine fragments and some fine grained CAI occur in an indeterminate, extremely fine grained matrix (black in thin section). No pyroxene was found despite a careful search, but rare grains of pentlandite and calcite were identified.

Geochemistry: Olivine (Fa_0.5-4.3, N = 3).

Classification: Carbonaceous chondrite (CM1/2).

Specimens: 20.3 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2017 Mar
Mass (g):	130.6
Pieces:	many
Class:	CM1/2
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	0.5-4.3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.3
Type spec location:	UWB
Main mass:	B. Hoefnagels
Comments:	Work name BH047; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Photos:

Credit	Photos
Public domain photographs:
A. Irving

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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