Meteoritical Bulletin: Entry for Northwest Africa 468

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Northwest Africa 468

Basic information

Name: Northwest Africa 468
This is an OFFICIAL meteorite name.
Abbreviation: NWA 468
Observed fall: No
Year found: 2000
Country: (Northwest Africa)
Mass: 6.1 kg

Classification
history:

NHM Catalogue:	5th Edition	(2000)	Iron-ung
Meteoritical Bulletin:	MB 85	(2001)	Iron-ung
MetBase:	v. 7.1	(2006)	IAB-ung
Recommended:			Iron, IAB-ung [explanation]

This is 1 of 68 approved meteorites classified as Iron, IAB-ung. [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites

Writeup

help

Writeup from MB 85:

Northwest Africa 468

Northwest Africa

Year of find unknown

Iron meteorite with silicate inclusions (ungrouped)

A 6100 g meteorite was purchased in Tucson, Arizona, in 2000 January by David Gregory from a Moroccan dealer who had bought it originally in Alnif, Morocco. Classification and mineralogy (J. Wasson and A. Rubin, UCLA): an ungrouped iron with chemical affinities to IAB irons and possibly related to the Antarctic iron Grove Mountains 98003; bulk metal composition, Cr = 2300 ppm, Co = 0.719 wt%, Ni = 11.85 wt%, Cu = 263 ppm, Ga = 31.0 ppm, As =

22.8 ppm, Sb = 0.431 ppm, W = 0.65 ppm, Ir = 2.75 , Pt = 4.0 ppm,Au = 2.21 ppm; contains massive silicate inclusions, with average mineral compositions of olivine, Fa_4–7, low-Ca pyroxene, Fs_8.6–9.4, high-Ca pyroxene, Fs_3.7Wo_45.4, plagioclase, An_78.7Or_2.6. Oxygen isotopes (R. N. Clayton and T. Mayeda, UChi): silicate inclusions, δ₁₇O = +0.18·, δ₁₈O = +3.01·, ∆₁₇O = –1.39·. Specimens: main mass with DGregory, 230 First Avenue, Suite 108, St. Thomas, Ontario, Canada; type specimen, 61.6 g, UCLA; 185 g, ROM.

Data from:
  MB85
  Table 4
  Line 122:

Mass (g):	6100
Pieces:	1
Class:	Iron Ung.

Plots:

O isotopes:

Institutions
and collections

ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UChi: University of Chicago, Chicago, IL 60637, United States (institutional address; updated 28 Feb 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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