Meteoritical Bulletin: Entry for Northwest Africa 6959

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Northwest Africa 6959

Basic information

Name: Northwest Africa 6959
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6959
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 88.3 g

Classification
history:

Meteoritical Bulletin:	MB 101	(2012)	R5
Recommended:			R5 [explanation]

This is 1 of 39 approved meteorites classified as R5. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)

Comments:

Approved 22 Aug 2012

Writeup

Writeup from MB 101:

Northwest Africa 6959 (NWA 6959)

(Northwest Africa)

Purchased: 2011 June

Classification: Rumuruti chondrite (R5)

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

Petrography: Sparse, small chondrules and mineral fragments set in a fine-grained matrix containing fresh sulfides (pentlandite and pyrrhotite) and chromite. Olivine and clinopyroxene are plentiful, but no orthopyroxene was found.

Geochemistry: Olivine (Fa_38.6-38.9), clinopyroxene (Fs_10.9-11.8Wo_45.4-45.2; Cr₂O₃ = 0.5-1.2 wt.%). Oxygen isotopes (R. Tanaka, OkaU): replicate analyses of acid-washed subsamples by laser fluorination gave, respectively δ¹⁷O = 5.363, 5.384; δ¹⁸O = 4.655, 4.566; Δ¹⁷O = 2.901, 2.968 per mil).

Classification: R5 chondrite. This is an exceptionally fresh, unweathered specimen.

Data from:
  MB101
  Table 0
  Line 0:

Place of purchase:	St. Marie
Date:	P 2011 June
Mass (g):	88.3
Pieces:	2
Class:	R5
Shock stage:	S1
Weathering grade:	very low
Fayalite (mol%):	38.6-38.9
Ferrosilite (mol%):	10.9-11.8
Wollastonite (mol%):	45.4-45.2
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	17.7
Type spec location:	UWB
Main mass:	GHupé
Comments:	GH-416; submitted by A. Irving

Plots:

O isotopes:

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)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Dominik Stoeckli
Gregor H.
Mirko Graul

Geography:

Coordinates:

Unknown.

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

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