Meteoritical Bulletin: Entry for Northwest Africa 11338

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Northwest Africa 11338

Basic information

Name: Northwest Africa 11338
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11338
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 382 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	CK4
Recommended:			CK4 [explanation]

This is 1 of 128 approved meteorites classified as CK4. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 14 Jul 2017

Writeup

Writeup from MB 106:

Northwest Africa 11338 (NWA 11338)

(Northwest Africa)

Purchased: 2017 Mar

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Aras Jonikas in March 2017 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Separated, well-formed chondrules (apparent diameter 500±200 μm, N = 10) containing Cr-magnetite occur in a finer grained matrix containing stained magnetite, intermediate plagioclase and minor barite.

Geochemistry: Olivine (Fa_24.6-25.0, FeO/MnO = 88-102, N = 3), orthopyroxene (Fs_3.5-20.0Wo_1.4-1.1, N = 3), low-Ca pyroxene (Fs_21.5Wo_5.0), augite (Fs_21.9Wo_49.2).

Classification: Carbonaceous chondrite (CK4). Olivine is unusually Fe-poor for an equilibrated CK chondrite.

Specimens: 24.42 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2017 Mar
Mass (g):	381.8
Pieces:	1
Class:	CK4
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	24.6-25.0
Ferrosilite (mol%):	3.5-20.0
Wollastonite (mol%):	1.4-1.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	24.42
Type spec location:	PSF
Main mass:	A. Jonikas
Comments:	Work name AJ17-5; 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)

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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

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