Meteoritical Bulletin: Entry for Northwest Africa 7967

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Northwest Africa 7967

Basic information

Name: Northwest Africa 7967
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7967
Observed fall: No
Year found: 2006
Country: (Northwest Africa)
Mass: 73.9 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Eucrite-br
Recommended:			Eucrite-br [explanation]

This is 1 of 187 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 10 Dec 2015

Writeup

Writeup from MB 104:

Northwest Africa 7967 (NWA 7967)

(Northwest Africa)

Purchased: 2006 Feb

Classification: HED achondrite (Eucrite, brecciated)

History: Purchased by Mike Silver in February 2006 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Matrix-poor breccia containing angular eucrite clasts with variable textures (subophitic, intersertal, variolitic). Minerals are calcic plagioclase, finely-exsolved pigeonite, silica polymorph, ilmenite, Ti-chromite, troilite and stained Ni-free metal.

Geochemistry: Orthopyroxene (Fs_63.3-64.0Wo_4.1-4.7, FeO/MnO = 28-30, N = 3), clinopyroxene (Fs_31.8-32.2Wo_41.0-39.8, FeO/MnO = 30-33, N = 3).

Classification: Eucrite (breccia).

Specimens: 17.9 g including one polished thin section at ROM; remainder with Mr. M. Silver.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2006 Feb
Mass (g):	73.87
Pieces:	5
Class:	Eucrite-br
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	63.3-64.0; 31.8-32.2
Wollastonite (mol%):	4.1-4.7; 41.0-39.8
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	17.9
Type spec location:	ROM
Main mass:	M. Silver
Comments:	MS2; 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7810 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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