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Northwest Africa 11324
Basic information Name: Northwest Africa 11324
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11324
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 80.5 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CO3
Recommended:  CO3    [explanation]

This is 1 of 554 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 14 Jul 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11324 (NWA 11324)

(Northwest Africa)

Purchased: 2016 Aug

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Ben Hoefnagels in August 2016 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Small, relatively closely packed chondrules (apparent diameter 350±200 μm, N = 12), angular mineral fragments and some very fine-grained, rimmed CAI occur in a sparse orange-brown matrix (~15 vol.%) containing kamacite, troilite and taenite.

Geochemistry: Olivine (Fa0.1-56.4, Cr2O3 in ferroan examples 0.02-0.11 wt.%, mean 0.06±0.03 wt.%, N = 7), orthopyroxene (Fs0.6-7.8Wo0.9-3.4, N = 3), pigeonite (Fs9.1Wo6.1), diopside (Fs0.3-0.6Wo43.5-45.0, N = 2).

Classification: Carbonaceous chondrite (CO3). Chondrules are much more closely packed and the proportion of matrix is lower than in typical CO chondrites. The relatively low chromium contents in ferroan olivine signify a subtype >3.5.

Specimens: 16.8 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2016 Aug
Mass (g):80.5
Pieces:2
Class:CO3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):0.1-56.4
Ferrosilite (mol%):0.6-7.8
Wollastonite (mol%):0.9-3.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):16.8
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:Work name BH051; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 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.
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Photos:
CreditPhotos
Public domain photographs:
A. Irving   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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