Meteoritical Bulletin: Entry for Northwest Africa 4704

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Northwest Africa 4704

Basic information

Name: Northwest Africa 4704
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4704
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass: 277 g

Classification
history:

Meteoritical Bulletin:	MB 99	(2011)	Iron, IIIE
Recommended:			Iron, IIIE [explanation]

This is 1 of 15 approved meteorites (plus 1 unapproved name) classified as Iron, IIIE. [show all]
Search for other: IIIE irons, Iron meteorites, and Metal-rich meteorites

Comments:

Approved 21 Sep 2010
Revised 12 Dec 2010: Reclassified from IIIAB by Wasson

Writeup

Writeup from MB 99:

Northwest Africa 4704 (NWA 4704)

(Northwest Africa)

Purchased: 2007

Classification: Iron meteorite (IIIE)

Petrography: Bands are short, swollen, but no inclusions visible in the centers. No FeS or schreibersite identified. Sample crossed by small cracks showing oxidation (very minor) at edges. Plessite, mainly dark gray or finely banded, is abundant, ~33% of area. No heat altered zone. Kamacite bandwidth ~0.7 mm.

Geochemistry: Co (mg/g) 4.89, Ni (mg/g) 89.0, Ga (µg/g) 17.5, Ge (µg/g) <60, As (µg/g) 4.73, Ir (µg/g) 0.149, Au (µg/g) 0.86.

Submitter: J. T. Wasson, UCLA.

Data from:
  MB99
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2007
Mass (g):	277
Pieces:	1
Class:	Iron, IIIE
Classifier:	Wasson
Type spec mass (g):	21
Type spec location:	UCLA
Main mass:	Birdsell
Comments:	Submitted by Wasson

Institutions
and collections

UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
Birdsell: Arizona Skies Meteorites, P.O. Box 2412, Flagstaff, AZ 86003, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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