Meteoritical Bulletin: Entry for Northwest Africa 8774

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Northwest Africa 8774

Basic information

Name: Northwest Africa 8774
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8774
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 42 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	CO3
Recommended:			CO3 [explanation]

This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 14 Mar 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 8774 (NWA 8774)

(Northwest Africa)

Purchased: 2014 Oct

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Stefan Ralew in October 2014 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively small (average apparent diameter ~200 μm), round chondrules occur within a metal-bearing matrix (~15 vol.%). Main minerals are olivine and orthopyroxene, subordinate subcalcic augite and augite, plus accessory altered kamacite, taenite, troilite, merrillite and calcic plagioclase. Rare grains of Al-Ti-rich clinopyroxene are present in the matrix, and are associated with gehlenite, spinel and calcite.

Geochemistry: Olivine (Fa_0.9-59.7, N = 3), orthopyroxene (Fs_1.0-6.2Wo_0.9-0.8, N = 3), subcalcic augite (Fs_1.2Wo_32.8), augite (Fs_0.8Wo_44.1).

Classification: Carbonaceous chondrite (CO3). This specimen is unusually metal-rich among CO chondrites.

Specimens: 8.5 g including one polished thin section at UWB; main mass with Ralew.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2014 Oct
Mass (g):	42
Pieces:	2
Class:	CO3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	0.9-59.7
Ferrosilite (mol%):	1.0-6.2
Wollastonite (mol%):	0.9-0.8
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	8.5
Type spec location:	UWB
Main mass:	S. Ralew
Comments:	RA10-3; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

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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Geography:

Coordinates:

Unknown.

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

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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