Meteoritical Bulletin: Entry for Northwest Africa 4838

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Northwest Africa 4838

Basic information

Name: Northwest Africa 4838
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4838
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 28 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	CV3
Recommended:			CV3 [explanation]

This is 1 of 605 approved meteorites (plus 1 unapproved name) classified as CV3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites

Comments:

Approved 7 Jun 2018

Writeup

Writeup from MB 107:

Northwest Africa 4838 (NWA 4838)

(Northwest Africa)

Purchased: 2006

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Marcin Cimała in 2006 from a dealer in Erfoud, Morocco, and subsequently acquired by ROM.

Petrography: (A. Irving and S. Kuehner, UWS) Granular chondrules (apparent diameter 500±300 µm, N = 15) and fine-grained CAI are set in a very fine-grained matrix (~40 vol.%, black in thin section).

Geochemistry: Olivine (Fa_0.1-37.9, N = 3), orthopyroxene (Fs_0.4-0.5Wo_1.0-0.9, N = 3), clinopyroxene (Fs_1.0Wo_28.0), Al-Ti-diopside (Fs_0.8Wo_59.0, Al₂O₃ = 19.9 wt.%, TiO₂ = 2.0 wt.%).

Classification: Carbonaceous chondrite (CV3).

Specimens: All material from this stone including one polished thin section is at ROM.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2006
Mass (g):	28
Pieces:	1
Class:	CV3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	0.1-37.9
Ferrosilite (mol%):	0.4-0.5; 1.0; 0.8
Wollastonite (mol%):	1.0-0.9; 28.0; 59.0
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	28
Type spec location:	ROM
Main mass:	ROM
Comments:	Work name MC030; submitted by A. Irving

Institutions
and collections

ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 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 Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Polandmet
Public domain photographs:
A. Irving

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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