Meteoritical Bulletin: Entry for Northwest Africa 6290

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Northwest Africa 6290

Basic information

Name: Northwest Africa 6290
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6290
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 1050 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 545 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 19 Sep 2011

Writeup

Writeup from MB 100:

Northwest Africa 6290 (NWA 6290)

(Northwest Africa)

Purchased: 2010 Jun

Classification: HED achondrite (Diogenite)

Petrography: (A. Irving and S. Kuehner, UWS): Fresh polymict breccia composed predominantly of distinctly "milky" orthopyroxene fragments and some polycrystalline clasts, with sparse pigeonite, olivine (bimodal in composition), calcic plagioclase, chromite, troilite and Ni-poor metal. Most of the orthopyroxene is charged with microscopic inclusions of chromite and troilite, which render it pale tan-colored in thin section.

Geochemistry: Orthopyroxene (Fs_22.9-24.9Wo_1.0; FeO/MnO = 30.8-31.0), pigeonite (Fs_28.1-29.1Wo_13.4-7.0; FeO/MnO = 22/6-26.0), magnesian olivine (Fa_12.9-13.1; FeO/MnO = 40.9-48.5), ferroan olivine (Fa_31.0; FeO/MnO = 44.2).

Data from:
  MB100
  Table 1
  Line 1330:

Origin or pseudonym:	Northwest Africa
Place of purchase:	Agadir
Date:	P 2010 Jun
Mass (g):	1050
Pieces:	10
Class:	Diogenite
Weathering grade:	low
Fayalite (mol%):	12.9-13.1; 31.0
Ferrosilite (mol%):	22.9-24.9
Wollastonite (mol%):	1.0
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21
Type spec location:	UWS
Main mass:	J. Higgins
Comments:	JH10-17; 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
METEORITICON

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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