Meteoritical Bulletin: Entry for Northwest Africa 6958

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Northwest Africa 6958

Basic information

Name: Northwest Africa 6958
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6958
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 65.9 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	LL7
Recommended:			LL7 [explanation]

This is 1 of 59 approved meteorites classified as LL7. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 30 Sep 2013

Writeup

Writeup from MB 102:

Northwest Africa 6958 (NWA 6958)

(Northwest Africa)

Purchased: 2011 Jun

Classification: Ordinary chondrite (LL7)

History: Purchased in 2011 June by GHupé from a Moroccan dealer at the St. Marie-aux-Mines Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Poikiloblastic texture. Tiny pyroxene, sodic plagioclase and troilite grains are enclosed within larger olivine poikiloblasts, and grains of metal (both kamacite and taenite) and chromite have "holly-leaf" shapes. No chondrules can be discerned,

Geochemistry: Olivine (Fa_29.1-29.9), orthopyroxene (Fs_23.4-23.5Wo_3.5-4.1), clinopyroxene (Fs_10.0-12.0Wo_43.5-38.4).

Classification: Ordinary chondrite LL7. This specimen has a poikiloblastic texture with no chondrules.

Specimens: 13.3 g of type material and one polished thin section are on deposit at UWB. The remaining material is held by GHupé.

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	St. Marie
Date:	P 2011 Jun
Mass (g):	65.9
Pieces:	25
Class:	LL7
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	29.1-29.9
Ferrosilite (mol%):	23.4-23.5
Wollastonite (mol%):	3.5-4.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	13.3
Type spec location:	UWB
Main mass:	GHupé
Comments:	GH-415; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 6752 approved meteorites from (Northwest Africa) (plus 2052 unapproved names)

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