Meteoritical Bulletin: Entry for Northwest Africa 4839

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Northwest Africa 4839

Basic information

Name: Northwest Africa 4839
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4839
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 28 g

Classification
history:

Recommended:

CV3 [explanation]

This is 1 of 610 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 4 Jul 2020

Writeup

Writeup from MB 109:

Northwest Africa 4839 (NWA 4839)

(Northwest Africa)

Purchased: 2006

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Marcin Cimała in 2006 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU; T. Bunch and J. Wittke, NAU) Well-formed chondrules (apparent diameter 980±450 µm, N = 24) and very fine grained CAI are set in a fine grained opaque matrix (~35 vol.%, black in thin section).

Geochemistry: Olivine (Fa_18.7±17.3, range Fa_0.5-45.7, N = 9), low-Ca pyroxene (Fs_1.5±0.5Wo_0.7±0.2, range Fs_1.1-2.1Wo_0.5-0.9, N = 3), diopside (Fs_1.0±0.1Wo_44.7±2.0, range Fs_0.9-1.1Wo_43.2-46.1, N = 2).

Classification: Carbonaceous chondrite (CV3).

Specimens: 6.0 g including one polished thin section at PSF; remainder with Mr. M. Cimała.

Data from:
  MB109
  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%):	18.7±17.3
Ferrosilite (mol%):	1.5±0.5
Wollastonite (mol%):	0.7±0.2
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	6.0
Type spec location:	PSF
Main mass:	M. Cimala
Comments:	Work name MC031; submitted by A. Irving

Institutions
and collections

NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Polandmet

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9092 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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